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Bibliography on: Invasive Species

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ESP: PubMed Auto Bibliography 30 Nov 2025 at 01:50 Created: 

Invasive Species

Standard Definition: Invasive species are plants, animals, or pathogens that are non-native (or alien) to the ecosystem under consideration and whose introduction causes or is likely to cause harm. Although that definition allows a logical possibility that some species might be non-native and harmless, most of time it seems that invasive species and really bad critter (or weed) that should be eradicated are seen as equivalent phrases. But, there is a big conceptual problem with that notion: every species in every ecosystem started out in that ecosystem as an invader. If there were no invasive species, all of Hawaii would be nothing but bare volcanic rock. Without an invasion of species onto land, there would be no terrestrial ecosystems at all. For the entire history of life on Earth, the biosphere has responded to perturbation and to opportunity with evolutionary innovation and with physical movement. While one may raise economic or aesthetic arguments against invasive species, it is impossible to make such an argument on scientific grounds. Species movement — the occurrence of invasive species — is the way the biosphere responds to perturbation. One might even argue that species movement is the primary, short-term "healing" mechanism employed by the biosphere to respond to perturbation — to "damage." As with any healing process, the short-term effect may be aesthetically unappealing (who thinks scabs are appealing?), but the long-term effects can be glorious.

Created with PubMed® Query: ("invasive species" OR "invasion biology" OR "alien species" OR "introduced species" ) NOT pmcbook NOT ispreviousversion

Citations The Papers (from PubMed®)

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RevDate: 2025-11-29

de Alcântara BM, Santana PHC, Santos FRD, et al (2025)

Allelopathy as a Strategy for Biological Invasion: Calotropis procera and Its Impact on Plant Succession.

Chemistry & biodiversity [Epub ahead of print].

This article reports on the allelopathic potential of Calotropis procera (Aiton) W.T. Aiton foliage on Handroanthus impetiginosus (Mart. ex DC.) Mattos. Predominant species in semiarid environments, especially in the Caatinga of the Northeast, where it acts as an invasive species. The leaves of C. procera were mixed with soil from the Caatinga and left to decompose for 90 days. The control group consisted only of soil from the Caatinga, Northeast, Brazil. The germination test was conducted in quadruplicate (30 seeds/treatment). For growth, 30 replicates per treatment were used, each with one seedling of the recipient species. The identification of the chemical constituents of C. procera was assessed by GC-MS. The data was submitted to the one-way ANOVA test. Residues from the decomposition of C. procera litter negatively affected seedling germination, with a reduction of up to 80% in the treatments evaluated. The phytochemical analysis showed the presence of 18 compounds, grouped into six main classes. Among the main compounds identified were: α-amyrin (C30H50O) with 2.69% and O-acetyl-β-amyrin (C32H52O2) with 6.19% concentration. Significant variation was observed in the thickness of the tissues and regions of the radicle, hypocotyl and leaves of H. impetiginosus. C. procera litter has a negative allelopathic potential on the recipient species, which could lead to their reduction in the natural environment.

RevDate: 2025-11-29
CmpDate: 2025-11-29

Abbasi M, Yousefi S, Khayatzadeh S, et al (2025)

Detection of invasive Aedes mosquitoes (Diptera: Culicidae): a crucial alert for public health in Northwest of Iran.

Archives of public health = Archives belges de sante publique, 83(1):288.

BACKGROUND: This study investigates the efficiency of entomological surveillance programs in East Azerbaijan Province, focusing on Points of Entry (PoEs) along the Aras River, for the early detection of invasive Aedes. Given the increasing risk of dengue fever due to the presence of Aedes albopictus and Aedes aegypti in neighboring regions, the research aims to assess the distribution of these mosquitoes and other potential vectors.

METHODS: A longitudinal study was conducted from April 2021 to August 2024 in high-risk regions of East Azerbaijan, northwestern Iran. Data collection involved biweekly surveillance at PoEs using ovitraps, larval surveys, and human-baited traps, with evaluations were expanded in July and August 2024 to address increased transportation activity at strategic locations outside the established surveillance program. Data were analyzed to identify population patterns and enhance understanding of mosquito dynamics in the region.

RESULTS: During a four-year entomological surveillance study, 22,553 mosquito specimens (Family: Culicidae) were collected, with 79% (N = 17,803) from PoEs and the remaining (N = 4,750) belonged to other areas. In PoEs, five species were identified and Culex pipiens was the predominant species (89%). Mosquito populations showed significant variation in abundance, peaking in July and August. In non-PoE locations, 14 species were collected during the study period, including the first detection of Ae. albopictus in East Azerbaijan Province.

DISCUSSION AND CONCLUSION: This study highlights the critical role of mosquito surveillance in detecting and managing invasive species. The dominance of Cx. pipiens and the presence of Ae. albopictus raise concerns about the transmission of arboviruses in the region. Therefore, effective measures for monitoring and controlling mosquito populations are crucial for preventing disease outbreaks in the region.

RevDate: 2025-11-29
CmpDate: 2025-11-29

Demetriou J, Martinou AF, Bowler D, et al (2025)

The Cyprus Database of Alien Species (CyDAS).

Scientific data, 12(1):1881.

Invasive alien species (IAS) are a direct driver of global biodiversity loss, and can also affect societies, economies and human health. Maintaining up-to-date alien species inventories is important for informing policy and management decisions. Here we present the Cyprus Database of Alien Species (CyDAS), an openly accessible, online dataset providing informational resources on alien species on the island of Cyprus. The dataset (up to end of December 2023) includes information on 1,293 terrestrial, freshwater and marine introduced taxa, with species profiles being constantly updated to keep track of new arrivals. The CyDAS aims to catalogue and supplement our knowledge on the alien species of Cyprus; to help develop and enhance early warning and rapid response systems; to raise public awareness of the risks posed by the IAS subset; to strengthen and enhance engagement and public participation in surveys in the field of biological invasions; and to inform IAS policy. CyDAS is a free, online database and we would like to encourage other researchers and decision-makers to provide information on IAS.

RevDate: 2025-11-28

Mallett MC, Thiem JD, Butler GL, et al (2025)

Evaluating bioelectrical impedance analysis (BIA) as a tool for assessing freshwater fish condition.

Comparative biochemistry and physiology. Part A, Molecular & integrative physiology pii:S1095-6433(25)00157-6 [Epub ahead of print].

The nutritional status, or condition, of fish is a key health proxy influencing vital life history processes including migration, reproduction, and recruitment. Numerous morphological, biochemical, and electronic metrics are used to assess fish condition, yet it remains unclear if these metrics are congruent with each other and across species. This study evaluates bioelectrical impedance analysis (BIA) as a tool for assessing fish condition by comparing it with morphological (e.g. condition index, hepatosomatic index) and biochemical (e.g. percentage and total-body mass compositions of lipid, mineral, protein and water content and bulk C:N ratios in muscle tissue) condition metrics in three native Australian fish species (Macquaria ambigua, Nematalosa erebi, and Percalates novemaculeata) and one invasive species (Cyprinus carpio). Using simple least-squares linear regressions and Principal Component Analysis (PCA), we uncovered that BIA parameters correlated strongly with total-body masses of biochemical components that covary with body size, but showed weaker correlations with percentage compositions of the same components. However, phase angle, a common BIA measure, showed some significant correlations with morphological condition and lipid content, although these relationships were generally weak and species dependent. These findings suggest that BIA can effectively estimate certain physiological parameters, but caution should be applied when interpreting BIA metrics, as their relationship with established indicators of condition may vary. The current study underscores the importance of combining multiple methods to provide a comprehensive understanding of fish condition in freshwater ecosystems, which can be used to provide mechanistic linkages with anthropogenic impacts.

RevDate: 2025-11-28

Nguyen JA, Tolley-Jordan L, Slayton AP, et al (2025)

First report of a trematode infection in an invasive population of Pomacea maculata: Evidence of a phaneropsolid (Trematoda: Microphalloidea) and recommended methods for surveillance.

Parasitology international pii:S1383-5769(25)00176-X [Epub ahead of print].

Giant apple snails, Pomacea maculata (Caenogastropoda: Ampullariidae), are native to South America but are now invasively established in subtropical freshwater habitats worldwide. In May 2017, P. maculata from an urban pond in Mobile, Alabama, USA were found infected with a larval trematode, prompting further collections to determine prevalence and investigate effects of infection by snail sex and size. In total, 284 snails (n = 184 female, n = 100 male) were collected in May, August, and October of 2017 and 2018. Of these, 60 females and 23 males were infected with prevalence per sampling event ranging from 4 to 67 % in females and 0-47 % in males. Across all collections, average prevalence was 29.1 %, exceeding values previously reported for Pomacea spp. in their native or invasive ranges. Infection prevalence was positively associated with snail mass, especially in males, suggesting larger individuals are more likely to serve as hosts. Phylogenetic analyses of partial 28S ribosomal DNA sequences identified the trematode as a member of Phaneropsolidae (Microphalloidea), a family that infects ampullariid snails in their native range and includes Phaneropsolus spp., some of which are zoonotic. Comparisons of cercarial morphology against published descriptions complement the molecular results. This is the first report of a trematode infecting an invasive population of P. maculata. These methods and findings demonstrate the utility of simple tissue screening and 28S rDNA sequence data in the rapid detection and molecular identification of larval trematodes collected from invasive populations of snails, facilitated by a newly designed broad-range digenean primer.

RevDate: 2025-11-28
CmpDate: 2025-11-28

Cooke SJ, Baker CL, Hinderer JLM, et al (2025)

Ten lessons for controlling invasive species: Wisdom from the long-standing sea lamprey control program on the Laurentian Great Lakes.

Bioscience, 75(11):985-996.

Sea lamprey (Petromyzon marinus) control in the Laurentian Great Lakes of North America is among the largest and most successful control programs of an invasive species anywhere on the planet. The effort began more than 75 years ago; it unites multiple nations, states, and provinces with the common goal of controlling this invasive species and protecting a valuable fishery. The science-based control program is administered by the Great Lakes Fishery Commission (GLFC), a body arising from a treaty signed by the United States and Canada. In the present article, we share 10 lessons learned from decades of successful sea lamprey control with the hopes of informing ongoing and future control programs targeting biological invasions. The 10 lessons we identified are to act boldly in times of crisis, to maintain the social license, to invest in capacity building, to break down the silos, to support fundamental science, to diversify your portfolio of control measures, to strive for continuous improvement, to confront the trade-off between information and action, to keep your foot on the gas, and to keep your eyes on the prize. The GLFC has long fostered a framework that uses some military strategy and verbiage that extends across the lessons (e.g., know your enemy). Other lessons are more nascent as the GLFC reenvisions its relationship with Indigenous peoples and governments in a path to reconciliation where two-eyed seeing is being embraced. Through adaptive management, horizon scanning methods, and embracing implementation science, the lessons learned about sea lamprey control will continue to evolve, which is itself a lesson. We submit that the lessons shared in the present article will help guide invasive species control programs spanning taxa, ecosystems, and regions.

RevDate: 2025-11-28

Chen L, Liu Y, Fan X, et al (2025)

Ethnomedicinal value of karst paddy weeds: insights from Zhuang communities in Jingxi, China.

Journal of ethnobiology and ethnomedicine pii:10.1186/s13002-025-00838-5 [Epub ahead of print].

BACKGROUND: In rice paddy ecosystems, weeds have long been regarded as harmful organisms that restrict crop yields. Traditional management models rely heavily on chemical herbicides, which have triggered issues such as soil pollution, biodiversity decline, and disruption of ecological chains, becoming prominent challenges to the sustainable development of modern agriculture. This study is conducted in the Zhuang ethnic settlement area of Jingxi, Guangxi, China. As a typical distribution area of karst landforms and a biodiversity hotspot, this region is rich in ethnic traditional knowledge. It aims to break through the cognitive dichotomy between weeds and resources. The research focuses on the traditional utilization practices of paddy field weeds by local Zhuang people, with an emphasis on exploring their ethnic medicinal value. The aim of this study is to supplement the deficiencies of existing pharmacopoeias in the inclusion of ethnic medicinal plants, while providing a scientific basis and practical reference for exploring resource utilization-based sustainable management strategies for paddy field weeds.

METHODS: Ethnobotanical survey methods (snowball sampling, semi-structured interviews, and participatory rural appraisal) were adopted to interview 160 local herbalists and villagers who provided informed consent. Simultaneously, plant specimens from field ridges were collected and identified, and the reliability of Traditional Ecological Knowledge (TEK) was ensured through cross-validation. Quantitative ethnobotanical indices, including Relative Importance (RI), Informant Consensus Factor (FIC), Fidelity Level (FL), and Economic Value Index (EV), were applied to validate TEK.

RESULTS: A total of 154 weed species with ethnic medicinal value in Jingxi's paddy field ecosystem were recorded, belonging to 60 families, with Asteraceae and Poaceae as the dominant families. One hundred and twenty-eight species (83.1%) were not included in the Chinese Pharmacopoeia, and 19 already included species showed significant differences in traditional efficacy compared with pharmacopoeia records. High-consensus uses (FIC ≥ 0.94) included tonsillitis, pancreatitis, and hair darkening. The significant medicinal properties presented by invasive species such as Bidens pilosa and Ageratum houstonianum provide pivotal empirical evidence for the resource-oriented management of invasive species. TEK was highly concentrated in the elderly group (43.13% aged 61-70), while cognitive gaps among the younger generation and excessive herbicide use posed dual threats to knowledge inheritance.

CONCLUSION: This study is the first to systematically reveal that paddy field weeds in Jingxi are an underdeveloped treasure trove of ethnic medicinal resources. The strategy of "utilization-based prevention, control, and conservation" not only provides a scientific basis for the sustainable management of weeds but also offers crucial support for supplementing medicinal resources, protecting biocultural diversity, and preserving traditional ecological knowledge.

RevDate: 2025-11-27

Martínez-González C, Mateus L, Sobral-Souza T, et al (2025)

Climate change may increase the suitable habitats for invasive freshwater cichlids in a Neotropical basin.

Scientific reports pii:10.1038/s41598-025-30425-3 [Epub ahead of print].

Although climate change may facilitate the spread of invasive alien species (IAS), research assessing this link remains limited. Recognizing suitable habitats where IAS have been introduced is crucial for biodiversity conservation and ecosystem management. Here, we integrated online, museum, and laboratory occurrence databases with local ecological knowledge (LEK) on IAS fishes from semi-structured interviews and georeferenced social network posts from traditional and recreational fishers to model the habitat-suitability of three voracious IAS Cichlids introduced in the Brazilian part of the Upper Paraguay River Basin (the Pantanal wetland and its tributaries). Our goal was to locate areas (regions, sub-basins, and reservoirs) most at risk from the spread of these IAS fishes in the basin. The findings reveal extensive suitable habitats for these IAS fishes throughout the study basin, currently covering half of the Pantanal wetland and up to 90% of the upstream sub-basins. Under future climate scenarios, these suitable habitats are projected to expand further, encompassing almost the entire Pantanal floodplain. These results highlight a potential IAS Cichlid range expansion in the Pantanal floodplains in the upcoming decades, correlating with common climate change forecasts. We also emphasize the value of integrating ecological niche models (ENMs) along with Citizen Science data to identify high-risk areas during early invasion stages, inform preventive strategies, and support conservation efforts to mitigate the impacts of IAS on native biodiversity.

RevDate: 2025-11-27
CmpDate: 2025-11-27

Snow NP, Koriakin KJ, Lavelle MJ, et al (2025)

Visually estimating body mass of wild pigs.

Scientific reports, 15(1):42292.

Body mass of wild pigs (Sus scrofa) can provide useful information regarding reproductive capacity of a population, and population health and resilience for this highly-destructive invasive species. Body mass of females is an indicator of whether they reproduce before 1 year of age, which could have substantial impacts on reproductive capacity of a population. Measuring body mass can be difficult because large wild pigs may require > 1 person to weigh, are often located in remote areas making equipment difficult to transport, or are often culled without access to the carcass (e.g., shooting from aircraft). We evaluated our ability to accurately estimate the body mass of wild pigs by visual inspection, and identified which factors (i.e., morphometrics and demographics) influenced the accuracy of our estimates. We visually estimated the body mass of wild pigs and then collected actual weights of 1,210 wild pigs across 5 regions (Alabama, Texas, Hawaii, Guam, Queensland). We also collected morphometric measurements and age to evaluate how these factors impacted our estimates. On average we found our estimates were accurate, averaging only -0.14 kg underestimated weights across all wild pigs weighed. However, our estimates were most severely underestimated (e.g., up to -20 kg) for younger wild pigs (i.e., < 1-3 years) that were heavier (i.e., > 30 kg). We also confirmed that although growth rates slowed after 1 year of age, wild pigs continued to grow in body length, head length, height, and girth as they aged, which explained why the age of an animal influenced our ability to generate accurate estimates. We surmised that young-yet-heavy wild pigs were disproportionally stouter than older animals, thus were underestimated due to their shortened appearance. Underestimating the body mass for young-yet-heavy females could misinform management plans, because these animals may have substantial influence on the reproductive capacity of a population. For visually estimating body mass of wild pigs, we recommend considering indicators of age (e.g., morphological proportions) to avoid underestimating young-yet-heavy animals with stout appearances. We also recommend calibrating observers regularly using known weights and morphometrics.

RevDate: 2025-11-27
CmpDate: 2025-11-27

Cao Y, Feng X, Lin LH, et al (2025)

Revisiting competitive outcomes through a trait lens: a global meta-analysis across species provenance.

Nature communications, 16(1):10639.

Biological invasions change the landscape of competition within communities and can have major consequences for biodiversity by driving competitive exclusion. However, the effects of competition on trait distributions are less understood, especially in how it depends on the native or nonnative provenance of the species involved. Here, we synthesize global data across plants and animals to investigate how competition alters trait distributions within species. We find that competition consistently reduces trait means and increases trait variation, following a directional-disruptive pattern. These effects depend on species provenance. Native competitors have limited influence on trait distributions within nonnatives, while nonnatives exert stronger impacts on natives. Morphological and life-history traits are especially responsive, whereas chemical and physiological traits show weak overall effects. However, nonnatives disproportionately affect the distribution of chemical and physiological traits. Intraspecific competition exerts a greater influence on trait distribution than interspecific competition, particularly in nonnatives. We discuss how these patterns align with key hypotheses on the evolution and ecology of species invasions. Our work provides insight into how competition shapes trait distributions and provides a trait-based null model for future tests of species interactions in the Anthropocene.

RevDate: 2025-11-27

Wright CJ, Wahlberg N, Vila R, et al (2025)

Project Psyche: reference genomes for all Lepidoptera in Europe.

Trends in ecology & evolution pii:S0169-5347(25)00292-7 [Epub ahead of print].

Project Psyche is a transnational initiative to generate and study chromosome-level reference genomes of all ~11 000 species of Lepidoptera (butterflies and moths) found in Europe. Here, we describe the decentralised network of collection and sequencing hubs that has enabled rapid progress, the standardised protocols for sampling and sequencing, and the collaborative framework for data analysis. With over 1000 species already sequenced, Lepidoptera are at the forefront of biodiversity genomics with the most reference genomes of any eukaryotic order. The completed pan-European catalogue of openly accessible lepidopteran genomes will transform our understanding of evolution and ecology, inform conservation, and foster advances in management of pests and invasive species. We highlight research areas that will benefit from this large-scale genome dataset.

RevDate: 2025-11-27
CmpDate: 2025-11-27

Ming Q, Hetherington M, Kessler-Mathieu M, et al (2025)

Odor Preference, Feeding, Survival, and Reproductive Fitness of the Invasive Larger Grain Borer Prostephanus Truncatus on Acorns of Three Native North America Oak Species.

Journal of chemical ecology, 51(6):114.

The larger grain borer, Prostephanus truncatus (Horn) (Coleoptera: Bostrichidae), is a major invasive pest of stored grains with the potential to expand its range across North America. While primarily associated with stored grains, this species could exploit non-grain hosts that facilitate survival and dispersal across broader geographic ranges. Previous research has shown that acorns can be a suitable food for a related stored product bostrichid. Here, we assessed the odor preference of P. truncatus for acorns from black oak (Quercus velutina), red oak (Quercus rubra), and bur oak (Quercus macrocarpa) compared to maize and wheat, and analyzed their volatile organic compound (VOC) profiles. Further, we measured P. truncatus feeding and reproduction on these acorns. Results demonstrated that P. truncatus responded to volatiles of each acorn species but responded most positively to bur oak acorns. Interestingly, bur oak acorns were also more attractive than maize, its main host grain. VOC profiles showed that 3-hepten-2-one and 2-(5-methyl-furan-2-yl)-propionaldehyde were detected only in bur oak acorns, which may contribute to odor preference. Prostephanus truncatus also preferred to feed on bur oak acorns over other oak species. Among the oak species tested, F1 progeny were detected only in bur oak acorns. These results suggest that P. truncatus exhibits host-use flexibility that enables it to utilize acorns in the absence of grains, highlighting the potential risk of landscape-level invasion by this pest in North America.

RevDate: 2025-11-27
CmpDate: 2025-11-27

Lantschner V, J Villacide (2025)

Invasion Potential of the Recently Established Woodwasp Sirex obesus (Hymenoptera: Siricidae) Across South American Pine Plantations.

Neotropical entomology, 54(1):117.

Invasive forest pests are among the greatest threats to global forestry, causing substantial economic losses and disrupting ecosystem dynamics worldwide. The recent detection of the North American woodwasp Sirex obesus (Hymenoptera: Siricidae) in Brazilian pine plantations poses a serious risk to South America's 4.6 million hectares of commercial pine forests. Here, we present the first comprehensive assessment of its invasion potential across the continent, combining species distribution modeling with a multi-factor invasion risk index. Using occurrence records from the species' native range, we modeled climatic suitability across South America and addressed invasion risk by integrating bioclimatic suitability, host distribution, proximity to invaded areas, and wood trade volumes with Brazil. Our model predicts suitable climatic conditions in 48% of South American pine plantation areas, particularly in montane and high-altitude regions along the Andean corridor and central-eastern Brazil. The mean temperature of the driest quarter was the most influential predictor of suitability. The invasion risk index identified southern Brazil, northeastern Argentina, Argentine Patagonia, and central Chile as the regions most vulnerable to the establishment, due to the convergence of extensive pine plantations, favorable climate, and either proximity to infested areas or intense trade connections with Brazil. These findings provide a foundation for targeted surveillance and phytosanitary measures aimed at preventing further spread. Early monitoring in high-risk regions, combined with stricter inspections of wood products, will be critical to avoiding widespread establishment and severe economic impacts across South American forestry.

RevDate: 2025-11-27
CmpDate: 2025-11-27

Niemiec P, Niczyporuk JS, Kozdruń W, et al (2025)

West Nile Virus Pilot Screening in Field-Collected Aedes japonicus (Theobald, 1901): An Update of Species Distribution in Poland, 2025.

Viruses, 17(11): pii:v17111515.

(1) Background: The Asian bush mosquito Aedes japonicus is an invasive species in Europe, including Poland. Given its laboratory-confirmed competence for West Nile virus (WNV) transmission and its detection as a WNV vector in field-collected mosquitoes, this study investigated whether Polish Aedes japonicus harbor WNV and aimed to update knowledge on its distribution in Poland. (2) Methods: In September 2024, 137 adult Aedes japonicus were collected from three suburban sites in Poland (Kielce, Mikołów, Kraków). Specimens were screened for WNV using RT-PCR and rRT-PCR. Additionally, unpublished records of Aedes japonicus were compiled to update the species' distribution. (3) Results: No WNV genetic material was detected in field-collected mosquitoes in Poland. By 2025, Aedes japonicus had been recorded in half of Polish voivodeships, with most observations in Małopolskie, Śląskie, and Łódzkie. The largest adult populations occurred in Kielce. Ecological traits in Poland matched European and US data, including larval development in artificial containers, preference for suburban and forested habitats, and peak adult activity in late summer. (4) Conclusions: Although WNV was not detected, the rapid spread of Aedes japonicus in Poland underlines the need for continued monitoring of its distribution, population dynamics, and potential role in WNV transmission.

RevDate: 2025-11-27

Wu F, Zhang P, Qin Y, et al (2025)

Secure Multi-Directional Independent Transmission Based on Directional Modulated 2D Conformal Phased Array.

Sensors (Basel, Switzerland), 25(22): pii:s25226882.

Directional Antenna Modulation (DAM) utilizing 2D conformal phased arrays has been demonstrated to enable secure Multi-directional Independent Transmission (MIT) over a broad angular range. This paper proposes an unbalanced DAM technique that dynamically allocates power according to transmission distance, thereby significantly enhancing transmission efficiency in practical scenarios where receivers are located at varying distances. In particular, a high-efficiency Differential Evolution (DE) optimization algorithm integrated with an "alien species invasion" mechanism is developed to accelerate convergence and optimize the phase delays of each array element. Bit Error Rate (BER) analysis for MIT reveals superior directional security compared to traditional methods, with conformal arrays providing wider angular coverage and spherical sparse arrays overcoming the half-wavelength spacing limitation. The simulation results validate that the proposed system achieves simultaneous secure transmissions in multiple directions while maintaining a BER below -40 dB.

RevDate: 2025-11-27
CmpDate: 2025-11-27

Wei W, Qi T, Lu J, et al (2025)

Evaluation of Biocontrol Efficacy of Bacillus velezensis HAB-2 Combined with Pseudomonas hunanensis and Enterobacter soli Against Cowpea Fusarium Wilt.

Microorganisms, 13(11): pii:microorganisms13112578.

Cowpea Fusarium wilt (CFW) is a soilborne fungal disease caused by Fusarium oxysporum f. sp. tracheiphilum (Fot), leading to substantial yield losses globally. This study evaluates the biocontrol potential of Bacillus velezensis HAB-2 and develops a microbial combination for effective disease management. B. velezensis HAB-2 suppressed F. oxysporum f. sp. tracheiphilum AIQBFO93 growth by 69.8% in vitro and exhibited multiple plant growth-promoting traits. Pot experiments demonstrated that HAB-2 alone achieved a 47.62% control rate against CFW. Furthermore, two compatible plant growth-promoting rhizobacteria (PGPR), Pseudomonas hunanensis HD33 and Enterobacter soli HD42, were isolated from the rhizosphere soil of cowpea previously treated with HAB-2. These two strains were combined with HAB-2 at different concentrations in 15 microbial combinations. The combined application of the three strains provided more consistent disease control, with the optimal combination demonstrating a 15.15% higher control rate than HAB-2 alone. Compared to the untreated control, this combination significantly increased cowpea fresh weight, leaf area, and plant height by 10.60%, 8.04%, and 7.81%, respectively, and upregulated the expression of defense-related genes, indicating enhanced resistance. These results confirm that B. velezensis HAB-2 is an effective biocontrol agent against wilt disease, and its synergistic application with functionally complementary PGPR strains provides a viable strategy for sustainable crop disease management.

RevDate: 2025-11-27
CmpDate: 2025-11-27

Tang S, Li Z, Huang G, et al (2025)

Life History and the Relation Between Population Dynamics and Meteorological Factors of Hyphantria cunea (Lepidoptera: Erebidae: Arctiidae) in Shanghai, China.

Insects, 16(11): pii:insects16111136.

The fall webworm Hyphantria cunea (Lepidoptera: Erebidae) is a globally invasive species that causes serious damage to agriculture and forestry. Since the first invasion reported in Liaoning Province, China, it has spread extensively southward and was found in Shanghai in 2019. Owing to the climatic and environmental differences between these regions, the biology and population dynamics of H. cunea may have undergone changes in its newly invaded areas. In this study, we investigated the biology of H. cunea in Shanghai and monitored the population dynamics using sex-pheromone-baited traps. We analyzed the relationships between population dynamics and local meteorological factors, including temperature, precipitation, and sunshine duration. Our result indicates high temperatures and large diurnal temperature ranges have significant effects (R[2] = 0.723, p < 0.001) on the survival and development of H. cunea. Consequently, they play an important role in shaping its population dynamics. These findings enhance our understanding of how H. cunea responds to Shanghai's environmental conditions, provide a scientific basis for local pest management, and contribute to predicting its population trends.

RevDate: 2025-11-27
CmpDate: 2025-11-27

Chen Y, Zeng Z, La Q, et al (2025)

Invasion Mechanisms of the Alien Plant Datura stramonium in Xizang: Insights from Genetic Differentiation, Allelopathy, and Ecological Niche Analysis.

Biology, 14(11): pii:biology14111629.

Datura stramonium, which is originally native to Mexico, has been recognized as an invasive species following its introduction to China, where it has proliferated extensively. Despite its widespread impact, the mechanisms driving the invasion of D. stramonium remain insufficiently understood. Therefore, gaining insight into these mechanisms is essential for the development of effective strategies to prevent and control its further invasion. This study aims to elucidate the factors contributing to the successful invasion of D. stramonium in Tibet by examining genetic differentiation, allelopathic potential, and niche characteristics of its populations. Our findings reveal the following: (1) The genetic variation within 15 populations of D. stramonium is predominantly intra-populational, lacking distinct genealogical phylogeographic structure, and is indicative of recent population expansion. This suggests that human-mediated dispersal has played a significant role in the invasion of D. stramonium in Tibet. (2) Allelopathic assays demonstrate that extracts from various parts of D. stramonium exhibit significant inhibitory effects on the germination of Hordeum vulgare var. coeleste and Pisum sativum seeds. (3) D. stramonium exhibits the highest niche breadth within the plant community, coupled with a pronounced competitive ability for environmental resources. The invasion of D. stramonium poses a substantial threat to the diversity of local plant species. Consequently, the formulation of scientific management measures is of critical importance to prevent and control the invasion of D. stramonium and preserve biodiversity in the invaded area.

RevDate: 2025-11-27
CmpDate: 2025-11-27

Wang H, Liu Q, Shen J, et al (2025)

Modeling the Future Distribution of Trifolium repens L. in China: A MaxEnt Approach Under Climate Change Scenarios.

Biology, 14(11): pii:biology14111608.

Trifolium repens L. is a protein-rich, versatile Leguminous lawn plant that is widely distributed across global temperate and subtropical regions. As an invasive species originating in Europe, its distribution in China extends from Xinjiang in the West to Taiwan and the Yangtze River Delta in the East, and is widespread throughout Northeast and Central China. However, in recent years, the distribution pattern of T. repens has become increasingly patchy and irregular. Therefore, unraveling the potential distribution and key environmental drivers of T. repens is critical for understanding its ecological role. This study utilized current species distribution data of T. repens and employed the MaxEnt model to simulate its potentially suitable niches across present and future climate scenarios (SSP1-2.6, SSP2-4.5, SSP3-7.0, and SSP5-8.5) in China. This study identified Bio2 (mean diurnal temperature range) and Bio14 (precipitation of driest month) as the key drivers shaping the distribution of T. repens. Its current suitable habitats are primarily concentrated in the coastal, central, and Taiwan regions of China. Under future climates, these areas are projected to contract overall and shift toward lower latitudes and higher longitudes, with substantial suitable areas remaining only in the Eastern, Southern, and Taiwan regions. This study quantitatively assessed the ecological niche breadth of T. repens and its future spatial distribution under climate change, thereby laying a theoretical foundation for describing the ecological characteristics of this invasive species, conducting monitoring, and implementing further invasion risk management.

RevDate: 2025-11-27
CmpDate: 2025-11-27

Darrigran G, Agudo-Padrón I, Báez P, et al (2025)

Molluscs from South America to the World: Who and Where Are They?.

Biology, 14(11): pii:biology14111538.

Ecosystems and biodiversity around the globe face multiple threats, including climate change and invasive species. Non-native species are known for their resilience to disturbances and their ability to thrive more successfully than native species in urbanized or otherwise disturbed areas, and some of them can become invasive. It is a complex challenge to detect, manage, and control such species, which require coordinated efforts from society, government, and the academic community. In this study, the eMIAS (South American Invasive Mollusks Specialists) research group (27 experts from seven South American countries) aim to provide foundational knowledge for management of these species. We compiled and synthesized information on the mollusc species that are native to South America and that have been introduced to other regions of the world. A total of 29 species were detected, including 10 marine, 10 freshwater, and 9 terrestrial. For each species, the area of origin, date and place of introduction, and current distribution were determined. We could determine that (1) most of these introductions have occurred in connection with globalization processes, such as an increase in trade. (2) The potential source regions of those 29 species are also areas that received non-native species from elsewhere (e.g., Europe, Asia). (3) Regions where species introductions have taken place are subject to the impacts of climate change and/or urbanization.

RevDate: 2025-11-27
CmpDate: 2025-11-27

Da Re D, Deblauwe I, Kern EI, et al (2025)

A warming welcome? Belgium's increasing suitability for Aedes albopictus.

Parasites & vectors, 18(1):491.

Aedes albopictus, commonly known as the Asian tiger mosquito, is an invasive species of significant public health concern due to its ability to transmit dengue, chikungunya, and Zika viruses. Since arriving in Europe in the late 1970s, this mosquito species has progressively expanded its range, with Belgium marking an important step in its northward spread. The increasing frequency of its introduction raises the urgent question of whether Ae. albopictus could become permanently present in the country. This study investigates the potential for the establishment of Ae. albopictus populations in Belgium using a mechanistic model and assessing the likelihood of successful establishment based on simulated introduction events. Our results indicate that the probability of establishment is highest in Flanders, particularly under scenarios of early and multiple introductions during the summer months, even though the interannual climatic variability still plays a major role in establishment success. The establishment of Ae. albopictus in Belgium would introduce new epidemiological risks, as the species could facilitate the transmission of non-native viruses during particularly warm summers. While the transmission windows may remain limited compared to Mediterranean regions, continued introductions and climate change could expand these periods, increasing the likelihood of local outbreaks.

RevDate: 2025-11-26

Dubos N, Calesse S, Webster KC, et al (2025)

Diverging effects of global change on future invasion risks of Agama picticauda between invaded regions: Same problem, different solutions.

The Science of the total environment, 1008:180957 pii:S0048-9697(25)02597-5 [Epub ahead of print].

Predicting biological invasions is challenging because multiple factors can act in contrasting directions and exert heterogeneous effects across space. Nevertheless, modelling approaches provide valuable tools to anticipate the potential spread of invasive alien species and to support mitigation strategies. With an Ecological Niche Modelling approach, we predicted the invasion risks of Peters's Rock Agama Agama picticauda, a species that is spreading globally in non-forested areas through freight transport and un-/intentional releases from the pet trade. The potential establishment of the species in new areas is of concern for multiple endemic species throughout the world. We quantified the effects of climate, anthropogenic activity and forest cover on invasion risk. We used verified records from the native and non-native range and accounted for the latest methodological recommendations. We predicted how invasion risk will vary in the future (2070) using projections from two scenarios (SSP2 and SSP5). We predict that invasion risks will vary in diverging directions, depending on the region. The risk will increase in human-populated regions and on small islands but will decrease in Florida. We recommend increasing surveillance in vehicular transportation of material especially within the Comoros and the Mascarenes archipelagos. Since many introductions are related to the pet trade in Florida, we recommend stronger legal regulations and the promotion of public awareness. Promoting tree cover may be locally beneficial to prevent establishment of A. picticauda. The effect of climate change, land use change and human activities may differ between and within both, the native and the invaded regions.

RevDate: 2025-11-27
CmpDate: 2025-11-27

Laufer G, Gobel N, Alcántara I, et al (2025)

Effects of biological invasions and habitat degradation on amphibian populations in Cerro Largo, Uruguay.

Conservation biology : the journal of the Society for Conservation Biology, 39(6):e70107.

Amphibians are the most threatened vertebrates globally due to a range of stressors. In this study spanning 11 years and covering 61 Pampas ponds in Cerro Largo Department, Uruguay, we aimed to evaluate the combined effect of the invasion of the American bullfrog (Aquarana catesbeiana) and the loss of environmental heterogeneity on native anuran assemblages. We conducted annual breeding season sampling for which we recorded native anuran species presences and abundances across different ponds. Additionally, we documented bullfrog invasion history and abundance and key environmental and climatic variables. We measured pond heterogeneity, which is influenced by variations in livestock grazing intensity and historical human use of native forests. We used generalized linear mixed models to predict richness and abundance of native anurans. We recorded 18 native amphibian species across the ponds, with declines in both richness and abundance as bullfrog invasion intensified. Models showed that ponds could lose up to 40% of amphibian species and 50% of amphibian abundance within 10 years of bullfrog invasion. Although environmental heterogeneity, particularly microhabitat edge diversity, attenuates these impacts, it is insufficient to halt this process. Among the most affected native anuran species were 3 highly aquatic-associated species. Our results highlight stressor effects across a broad spatiotemporal scale through an integrative approach, which we recommend for future research. Our findings underscore the threat of invasions to amphibian conservation. By examining the combined impacts of biological invasions and environmental heterogeneity, we have advanced understanding of how global change drives amphibian declines. Urgent control measures are needed to eradicate and prevent invasions in amphibian breeding sites and to preserve and restore these habitats, the focus of which should be microhabitat diversity.

RevDate: 2025-11-26
CmpDate: 2025-11-26

Hindsley P, Huxster JK, Morgan A, et al (2025)

Concern for and perceived impacts to the Everglades: The role of environmental knowledge and cultural worldviews.

Environmental management, 76(1):16.

Public support for restoration in sensitive ecosystems like the Everglades depends in part on individual-level concern and perceptions of impact from environmental threats. This study examines how environmental knowledge and ideological and political factors (IPFs)- cultural worldview (CWV), political ideology, and voting behavior - influence Floridians' concern for the Everglades and their perceptions of impact for six different threats to the Everglades. Two of these threats, sea level rise and changes in precipitation, relate directly to climate change and thus are more likely to evoke ideological or political responses from participants. Analysis of our sample of 1437 Floridians reveals that: (1) Of the IPFs, CWV had the largest influence on environmental concern and perceptions of impact, except for in the case of sea level rise, for which voting behavior superseded CWV, (2) environmental knowledge had a larger influence on perceptions of impact for environmental threats that are not ideologically entangled (e.g. water quality), (3) IPFs had a larger influence on perceptions of impact from threats that are ideologically entangled (i.e. sea level rise and changes in precipitation), and (4) those with Communitarian-Egalitarian worldviews held higher levels of concern and perceived greater risk impacts on all but one of the threats (invasive species), although some differences vary across the distribution of environmental knowledge. These findings improve our understanding of how environmental knowledge and IPFs shape public concern for and perceptions of threats to the Greater Everglades ecosystem. These insights can help in developing communication strategies that generate public support for restoration.

RevDate: 2025-11-26

Martignoni MM, Garnier J, Tyson RC, et al (2025)

Towards a theory of microbially-mediated invasion encompassing parasitism and mutualism.

Biological invasions, 27(12):253.

UNLABELLED: Biological invasions pose major ecological and economic threats, and extensive research has been dedicated to understanding and predicting their dynamics. Most studies focus on the biological invasion of single species, and only in recent years has it been realized that multi-species interactions that involve native and invasive host species and their microbial symbionts can play important roles in determining invasion outputs. A theoretical framework that treats these interactions and their impact is lacking. Here we offer such a framework and use it to explore possible dynamics that may emerge from the sharing of native and non-native symbionts among native and non-native host species. Thus, for example, invasive plants might benefit from native microbial communities in the soil, or might be particularly successful if they carry with them parasites to which competing native hosts are susceptible. On the other hand, invasion might be hindered by native parasites that spread from native to invasive individuals. The mathematical framework that we present in this study provides a new mechanistic, cohesive, and intuition-enhancing tool for theoretically exploring the ways by which the subtleties of host-microbe relationships can influence invasion dynamics. We identify multiple pathways through which microbes can facilitate (or prevent) host invasion, microbial invasion, and the invasion of both hosts and their co-introduced microbes. We disentangle invasion outcomes and suggest possible ecological dynamics that may be underexplored in current invasion biology literature. Our work sets the foundations for invasion theory that includes a community-level view of invasive and native hosts as well as their microbial symbionts.

SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1007/s10530-025-03711-4.

RevDate: 2025-11-26
CmpDate: 2025-11-26

Christina AL, VM Claire (2025)

A general population KAP survey: supporting the design of interventions and tiger mosquito control efforts in response to arbovirus emergence in non-endemic areas.

One health (Amsterdam, Netherlands), 21:101247.

The Asian tiger mosquito, Aedes albopictus, a highly invasive species and vector of diseases such as dengue, chikungunya, and Zika, has rapidly spread across mainland France, including urban areas like Lyon. Local transmission of these diseases has been reported with increasing frequency, and the mosquito represents not only a major source of nuisance but also a growing public health concern. To better understand public engagement and improve vector control strategies, a large-scale Knowledge, Attitudes, and Practices (KAP) survey was conducted in the Lyon metropolitan area between September 2023 and February 2024. The survey collected 3990 responses through both field interviews and online forms. It addressed various themes, including mosquito biology, disease awareness, prevention measures and the willingness to engage in collective or scientific initiatives. Results revealed that 86 % of respondents experienced significant annoyance due to mosquitoes, affecting their quality of life. However, only 17 % expressed strong concern about disease transmission. Most participants were aware of basic mosquito behavior, such as daytime activity and common breeding sites. However, knowledge about the mosquito's physical characteristics and the full range of diseases it transmits was limited. Despite this, 78 % reported engaging in preventive measures, mainly removing stagnant water and using repellents, though many doubted the effectiveness of these actions. Statistical analysis revealed that factors such as age, education level, housing type, knowledge of mosquito biology, and perceived health risk were significantly associated with proactive behavior. These findings highlight a gap between perceived nuisance and public understanding of health risks and effective mosquito control strategies. They point to the limitations of individual action and underscore the importance of fostering collective, neighborhood-level engagement. Public awareness campaigns should shift from passive messaging to participatory, locally adapted approaches.

RevDate: 2025-11-26
CmpDate: 2025-11-26

Shattuck AV, Hollingsworth BD, Skrotzki J, et al (2025)

Field validation of multiple species distribution models shows variation in performance for predicting Aedes albopictus distributions at the invasion edge.

Parasites & vectors, 18(1):488.

BACKGROUND: Climate and land use changes have resulted in range expansion of many species. In this shifting disease landscape, it is important to leverage tools that can predict the distributions of invading vectors to target surveillance and control efforts and identify at-risk populations. Species distribution models (SDMs) are used to predict ranges of invasive species; however, invasive species often violate assumptions of equilibrium and niche conservatism. Moreover, these studies are rarely validated using independent data.

METHODS: We use long-term surveillance data for Aedes albopictus, a highly invasive mosquito capable of transmitting several arboviruses, at its range edge to evaluate a variety of SDMs (MaxEnt, GAM, Random Forest, Boosted Regression Tree) in predicting the Ae. albopictus range. We identify key environmental drivers of distributions and areas where models tended to disagree in predicting occurrence. At sites where models disagree, we sampled for Ae. albopictus to generate an independent dataset for field validation of models in addition to the common practice of cross-validation. Finally, we determine whether models based on early invasion data can predict later stage invasion ranges.

RESULTS: We found that landscape and climatic variables are important drivers of population distributions. SDM methods varied in predictive accuracy between models and across validation methods (i.e. cross vs. field validation). GAM and MaxEnt best predicted later-stage invasion distributions, requiring fewer years of training data.

CONCLUSIONS: Our work shows that SDMs can be useful tools to predict the ranges of invasive species and highlights the importance of comparing predictions of invasive species' range.

RevDate: 2025-11-25
CmpDate: 2025-11-25

Kim G, Choi EH, UW Hwang (2025)

Three distinct genetic lineages of Trichonephila clavata based on mitochondrial COI and genome-wide SNPs on the Korean Peninsula.

Scientific reports, 15(1):41911.

Trichonephila clavata L. Koch, 1878, an East Asian species renowned for its long-distance ballooning dispersal, has recently drawn attention as an invasive species following its introduction into the southeastern United States. However, few population genetic studies have been undertaken to investigate population genetic diversity and structure which will be helpful for its management. Here, we examined ten populations of T. clavata on the Korean Peninsula using mitochondrial COI and genome-wide SNP data to broadens the understanding of genetic and demographic processes of the species. Our results revealed: (1) high genetic diversity in COI but relatively low diversity in SNPs; (2) the presence of three genetic lineages detected by both markers; (4) population expansion in each COI genetic lineage and constant population size in each SNP genetic lineage; and (5) stepwise lineage divergence estimated based on COI and lineage divergence with admixture event based on SNPs. These findings suggest that multiple factors, which are ballooning dispersal, demographic dynamics and geological event, may play a pivotal role in shaping population genetic patterns with geographic co-occurrence among the lineages. Consequently, this study provides insights into the genetic architecture of natural populations and offers a valuable baseline for understanding the population genetic pools of invasive populations of this species.

RevDate: 2025-11-26
CmpDate: 2025-11-26

Mourouzidou S, Mola M, Ceriani A, et al (2025)

Adding invasive alien plant-derived biochar and stinging nettle powder in Populus nigra phytoremediation of arsenic- and lead-contaminated Technosol alters microbial community assembly and network stability.

The Science of the total environment, 1004:180693.

This study examined the effects of biochar and nettle Urtica dioica amendments on microbial diversity and community assembly in a historically contaminated Technosol collected from a former silver‑lead mine in Pontgibaud (Puy-de-Dôme, France). We investigated how two types of biochar obtained from the biomass pyrolysis of two invasive alien plant species (Ailanthus altissima and Solidago gigantea) at different doses (2 % vs 5 %), alone and in combination with stinging nettle (Urtica dioica) powder inputs that influence the soil's microbial community structure under controlled phytoremediation conditions using Populus nigra. We integrated niche theory and network analysis to examine how these amendments alter community-level cohesion and resilience under heavy metal stress, with implications for phytoremediation. We found that a 5 % biochar dose imposed stronger environmental pressure compared to a 2 % dose, resulting in a significant increase in soil alkalinity and electrical conductivity (EC). In amended soils, bacterial community assembly was primarily driven by stochastic processes, mainly due to dispersal. Fungal communities, in contrast, exhibited reduced stochasticity, particularly under the 5 % biochar-Solidago treatments. Furthermore, bacteria expanded their niche width, whereas fungi shifted toward specialist-dominated, narrower niches with greater overlap. The biochar co-application with stinging nettle increased network complexity for both microbial groups; however, the bacterial network responded with higher modularity and more negative links, while the fungal networks were non-modular and exhibited increased positive feedback loops. Network robustness analysis revealed that bacterial networks remained more stable under perturbation across all treatments, whereas fungal networks were more sensitive to hub node loss. Our findings suggest that both the concentration and type of biochar, as well as the presence of Urtica dioica amendment, distinctly affect microbial communities and should be carefully considered in designing optimal application regimes and strategies for soil remediation.

RevDate: 2025-11-25
CmpDate: 2025-11-25

Fan SY, Fristoe TS, Li SP, et al (2025)

Ecological similarities and dissimilarities between donor and recipient regions shape global plant naturalizations.

Nature communications, 16(1):10485.

A central question in ecology is why alien species naturalize successfully in some regions but not in others. While some hypotheses suggest aliens are more likely to naturalize in environments similar to donor regions, others suggest they thrive in regions where certain characteristics are different. Using the native (i.e., donor) and recipient distributions of 11,604 naturalized alien plant species across 650 regions globally, we assess whether plants are more likely to naturalize in regions that are ecologically similar or dissimilar to their donor regions. Our results show that species are more likely to naturalize in recipient regions where climates are similar and native floras are phylogenetically similar to those of their donor regions, indicating that pre-adaptation to familiar biotic and abiotic conditions facilitates naturalization. However, naturalization is also more likely in regions with lower native flora diversity and more intense human modification than in the species' native range. Among all predictors, climate similarity and difference in native flora diversity emerge as the strongest predictors of naturalization success. In conclusion, ecological similarity in some factors but dissimilarity in others between donor and recipient regions promote the naturalization of alien plants and contribute to their uneven global distribution patterns.

RevDate: 2025-11-25
CmpDate: 2025-11-25

Guedes LM, Ortiz J, Moreira ASFP, et al (2025)

Allelochemical Stress Induced by the Invasive Species Teline monspessulana Disrupts Antioxidant Defenses and Morphoanatomy in Quillaja saponaria.

Physiologia plantarum, 177(6):e70643.

Sclerophyllous forests face significant challenges from invasive species, such as Teline monspessulana, which negatively affect native species, such as Quillaja saponaria, in Chile. The allelopathic effects of T. monspessulana, including the release of phenolic compounds and alkaloids, contribute to oxidative stress in Q. saponaria; yet, the specific mechanisms underlying these effects remain poorly understood. This study aimed to investigate the morphoanatomical features, dynamics of reactive oxygen species (ROS), and functions of antioxidant defense mechanisms in Q. saponaria in response to allelochemical stress induced by the substrate (IS) and aqueous extracts (TE) of T. monspessulana. Using anatomical and histochemical techniques, ROS and phenol quantification, and enzyme activity measurements, this research aims to provide insights into improving the resilience of Q. saponaria in reforestation programs within the sclerophyllous forests of Chile invaded by T. monspessulana. The present results revealed that both IS and TE treatments significantly retarded initial growth and decreased dry mass by approximately 45%, accompanied by mesophyll disorganization, epidermis suberization, and cell wall lignification. Additionally, both treatments induced significant overproduction of ROS that could not be dampened by enzymatic antioxidant systems or phenolic compounds, indicating a disrupted redox balance under allelochemical stress. For Q. saponaria, this effect appears to be related to the abundance of phenolic acids and alkaloids in the aerial organs of T. monspessulana. Understanding these dynamics is crucial for managing invasive T. monspessulana and protecting native Q. saponaria in its unique ecosystem. These findings emphasize the importance of strategies mitigating the impacts of allelopathic invaders as part of forest restoration efforts.

RevDate: 2025-11-25
CmpDate: 2025-11-25

Agneray AC, Parchman TL, Forister ML, et al (2025)

Unexpected productivity and invasion resistance in plant communities assembled from allopatric populations.

Proceedings. Biological sciences, 292(2059):20252026.

Species with shared geographic history may show coevolution that reduces niche overlap and improves resource capture. Thus, plant communities assembled from sympatric source populations (shared locations) are predicted to be more productive and invasion resistant than those from allopatric sources (different locations), even with identical species composition. Using four native plant species from 15 environmentally similar locations across a broad region, we compared ecosystem function among communities assembled from allopatric or sympatric sources. Consistent with predictions of niche differentiation in co-occurring native plants, we observed more negative native plant-plant interactions in allopatric-sourced communities, and more positive interactions in sympatric-sourced communities. However, this did not translate into the predicted community-level outcomes. Unexpectedly, allopatric-sourced communities outperformed sympatric ones in all responses, with 34-42% more inflorescences, 17% higher survival, 21% longer growing season, 29-72% greater size, and after invasion, 70% less invader biomass. Two impactful native species grew larger and reproduced more when grown with allopatric neighbours, leading to greater invasion suppression, though the mechanism for this response is unknown. These findings challenge assumptions about the universal advantages of maintaining shared origins for community function and have broad implications for understanding plant competition and community assembly, as well as restoration of invaded ecosystems.

RevDate: 2025-11-25
CmpDate: 2025-11-25

Kinney MH, Blain S, D Schluter (2025)

Experimental test of hybrid fitness change as a cause of species collapse following species invasion.

Proceedings. Biological sciences, 292(2059):20251457.

Recent years have seen increased incidences of hybridization between previously stable sympatric species, sometimes leading to collapse. The causes, and particularly the role of improved hybrid fitness in a changing environment, are poorly known. A recent example is the sympatric stickleback species pair of Enos Lake, Vancouver Island, which collapsed into a hybrid swarm following the invasion of the lake by American signal crayfish. Environmental changes can increase hybridization through increased inter-species mating or enhanced hybrid fitness, though few mechanisms have been experimentally tested. Using mesocosms, we tested whether crayfish addition alters the prey community and changes F1 hybrid fitness relative to pure limnetic and benthic threespine stickleback. Crayfish addition depleted benthic invertebrate biomass and negatively impacted survival of all three stickleback cross types. Crayfish had little effect on relative survival but led to a higher growth rate of hybrids relative to pure species. This improvement in hybrid fitness is unlikely to be the sole reason for the Enos Lake collapse, as breakdowns in premating isolation might have also been crucial. Nevertheless, this work provides a rare experimental demonstration of a causal link to changes in hybrid fitness, providing evidence that reduced selection against hybrids has contributed to the collapse.

RevDate: 2025-11-25

Chalkowski K, Miller RS, Chandler JC, et al (2025)

Elevated Exposure to Influenza A Viruses in Wild Pigs (Sus scrofa), Texas, USA.

Journal of wildlife diseases pii:508239 [Epub ahead of print].

Detections of highly pathogenic avian influenza viruses in mammals have increased globally, underscoring the need to assess influenza A virus (IAV) exposure in species that bridge wildlife, livestock, and human interfaces. We collected serum from 396 wild pigs (Sus scrofa, hybrids of wild boar and domestic swine) between October 2022 and May 2023 on a cattle ranch in north central Texas, USA, to estimate IAV seroprevalence and identify ecologic correlates of exposure. Using commercial blocking ELISAs and hemagglutination inhibition assays, we report high recent exposure of wild pigs to IAVs (seroprevalence 40%, n=396). Seropositivity was highest in individuals that were female, >2 yr old, sampled during spring (compared with fall or winter), and/or sampled <1.5 km from surface water. Almost half (46.3%, 57/123) of the samples were positive for at least two hemagglutinin clade representatives, and 13.8% (17/123) had titers against both an H1 and an H3 strain. These results indicate a hotspot of IAV circulation in wild pigs in north central Texas and highlight elevated exposure near water bodies, where wild pigs may contact wild waterfowl. Enhanced surveillance of wild pigs at the wildlife-livestock-waterbird interface is warranted to better understand ecologic and epidemiologic pathways for IAV transmission and reassortment.

RevDate: 2025-11-24

Evans T, RN Cuthbert (2025)

Management of alien bird impacts does not reflect their severity.

Journal of environmental management, 396:128053 pii:S0301-4797(25)04029-0 [Epub ahead of print].

Biological invasions can harm biodiversity - indeed, they are a principal cause of native species extinctions (Bellard et al. 2016. Alien species as a driver of recent extinctions. Biol. Lett. 12:20150623). Biological invasions occur worldwide - whilst some of their impacts are managed, others are not. Identifying drivers of management actions may reveal why some impacts remain unmanaged, informing strategies to improve management consistency. We identified factors that influence actions to protect native animals from the biodiversity impacts of alien birds. We reviewed literature to identify impacts, categorising them as unmanaged or managed (irrespective of management success). For each impact, we collected data on variables hypothesised to influence management, including characteristics of affected native species (e.g., endemism) and alien species (e.g., years resident as an alien); characteristics of impacts (e.g., their severity - how harmful they are to native species, as measured using a published framework); and characteristics of the environment (e.g., human population density). We used binomial mixed effects models to identify associations between variables and management. Intuitively, actions to manage alien bird impacts tend to focus on the protection of endemic species. However, they do not focus on the most severe impacts, nor the most threatened native species. Indeed, feasibility influences actions, whereby long-established alien bird populations with damaging biodiversity impacts remain unmanaged, most likely because these long-established populations tend to be large and widespread and hence are considered too difficult or costly to manage. Timely interventions are crucial to prevent the damaging biodiversity impacts of biological invasions from becoming unmanageable.

RevDate: 2025-11-24

Huang T, Song Z, Zhang C, et al (2025)

Deciphering the Distinct Vascular Liver Injury Induced by Pyrrolizidine Alkaloids: From the Invasive Species to Health Hazard.

Journal of agricultural and food chemistry [Epub ahead of print].

Pyrrolizidine alkaloids (PAs) are the most common plant-derived toxins present in numerous herbal and food products, but their environmental transfer pathways and toxicological mechanisms remain unclear. This study establishes a complete contamination pathway from environmental source to molecular target. We identified the invasive plant Bidens alba as a novel PA producer and provided the first evidence of transfer to honey by detecting corresponding PAs and characteristic Bidens alba pollens in local samples. Mechanistically, we demonstrated that PA toxicity fundamentally differs from classic hepatotoxins like acetaminophen. Instead of directly damaging liver cells, PAs first induce red blood cell rupture (hemolysis) by selectively inhibiting glucose-6-phosphate dehydrogenase (G6PD). This hemolytic event precedes observable liver sinusoidal endothelial damage and initiates characteristic vascular liver injury. Our findings establish a new route of food contamination and redefine PA toxicity by identifying blood cells as the primary target, with significant implications for food safety and public health.

RevDate: 2025-11-24
CmpDate: 2025-11-24

Ensing DJ, Nelson TD, Moffat CE, et al (2025)

Together again: the invasive mustard Hesperis matronalis suffers devastating seed predation by a recently adventive specialist weevil.

BioControl (Dordrecht, Netherlands), 70(6):835-847.

UNLABELLED: The enemy release hypothesis underpins classical (or importation) biocontrol as a management technique for invasive species. Classical biocontrol has had resounding success when prospective control agents have been subject to appropriate screening before release. Occasionally, however, natural enemies have been reunited with their hosts accidentally. Such adventive agents may provide effective control but have also avoided the careful screening characteristic of modern importation biocontrol programmes. We were studying the invasive mustard, Hesperis matronalis L. (Dame's rocket; Brassicaceae: Hesperidae), when we discovered rampant seed predation by an unknown seed predator. Using DNA barcoding, we identified this seed predator as Ceutorhynchus inaffectatus Gyllenhal (Coleoptera: Curculionidae), a recently (2018) detected species in North America. Comparing potential and realised seed production, we found that seed predation by C. inaffectatus strongly reduces H. matronalis fecundity, and that this effect was not moderated by infection with turnip mosaic virus (TuMV), a commercially important pathogen hosted by H. matronalis and transmitted by polyphagous aphid species. C. inaffectatus is expected to be highly host-specific, and the absence of native Hesperidae species in North America suggests the potential for C. inaffectatus as a classical, but adventive, biocontrol agent of H. matronalis. We suggest population genetic research to identify the origin of C. inaffectatus, and host specificity testing before any intentional redistribution of this species for H. matronalis biocontrol. More generally, this system acts as a model for biocontrol prospects with adventive insect herbivore species.

SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1007/s10526-025-10338-w.

RevDate: 2025-11-24

Royer P, Catubis KM, Dumont F, et al (2025)

From the predator to the prey: a case study of the vulnerability of Harmonia axyridis to aggressive competitors.

Insect science [Epub ahead of print].

Harmonia axyridis was originally considered and used as a biocontrol agent throughout the world. But its effectiveness has turned into a serious detriment to ecosystems, as it has become an invasive and harmful species, gradually displacing native coccinellid populations. Its invasive success mostly relies on its voracity, aggressiveness, and dominance in intraguild predation (IGP) interactions. Aggressiveness is a major behavioral characteristic known to influence IGP occurrence and outcome. So, what if H. axyridis were confronted with more aggressive competitors? To understand the vulnerability of H. axyridis to aggressive competitors, we confronted it with an IGP interaction involving two artificially selected lines of the generalist predator Nabis americoferus (one aggressive and one docile) in the presence of extraguild prey (Myzus persicae). Two hypotheses were formulated: (1) the IGP intensity toward H. axyridis is positively correlated with the intraguild predator's aggressiveness, and (2) the IGP intensity decreases in the presence of extraguild prey for both the aggressive and docile lines. Results showed that, as expected, the aggressive line displayed a higher IGP rate on H. axyridis than the docile line, supporting the first hypothesis. The second hypothesis was also supported, since extraguild prey availability led to a decrease in IGP for both lines. Apart from providing insights into the relationship between aggressiveness and IGP occurrence, the discussion focuses on the consequences for H. axyridis in the field as an invasive species and as a biological control agent.

RevDate: 2025-11-24

Mameno K, Suzuki T, Yamaguchi S, et al (2025)

Economic incentives contribute little to reducing agricultural damage from invasive non-native species: evidence from raccoon management in Hokkaido, Japan.

Pest management science [Epub ahead of print].

BACKGROUND: An economic incentive scheme is utilized to enhance citizens' support for managing invasive non-native species. However, the effectiveness of the incentive scheme in the outcomes of the management remains unclear. This study investigates the effectiveness of economic incentives in managing invasive non-native species, focusing on their impact on reducing crop damage. Using data from raccoon management in Hokkaido, Japan, and the Japanese agricultural census, our analysis applies an inverse probability-weighted regression adjustment to evaluate the outcomes.

RESULTS: The findings reveal that economic incentives for capturing raccoons do not significantly reduce crop damage. Additionally, although these incentives increase the number of captured raccoons, the additional captures do not result in measurable reductions in agricultural damage.

CONCLUSION: The absence of positive results underscores the need to develop and evaluate evidence-based management strategies for invasive non-native species. This study recommends implementing outcome-based incentive schemes that align rewards with measurable management goals. Additionally, testing and refining the design of incentive schemes based on their actual effects on management outcomes remain critical. Despite the null results, this study provides valuable insights into designing incentive schemes that garner citizen support while avoiding redundancy. These findings contribute to advancing effective management strategies for invasive species. © 2025 Society of Chemical Industry.

RevDate: 2025-11-23

Dong Y, Jin Q, Yin J, et al (2025)

Sustainable antifouling of marine biofilms using charge-modulated TiO2-Cu nanointerfaces: Mechanistic insights and environmental implications.

Environmental research pii:S0013-9351(25)02622-2 [Epub ahead of print].

Marine biofouling represents a critical environmental issue, as it accelerates fuel consumption, increases carbon emissions, and facilitates the spread of invasive species, thereby threatening marine ecosystem sustainability. Titanium alloys are extensively employed in marine applications due to their mechanical robustness and corrosion resistance, yet their intrinsic biocompatibility significantly facilitates microbial colonization and persistent biofilm development. Conventional antifouling strategies have predominantly focused on chemical modifications, while neglecting interfacial electrostatic interactions essential for combating electroactive biofilm-forming bacteria. In this study, an environmentally benign "electricity-against-electricity" antifouling platform was developed by exploiting charge-responsive interfaces to disrupt bacterial electroactivity. Capacitive titania nanotube (TNT) composites with controllable Cu content were fabricated on Ti substrates and subjected to direct current charging. The optimized TNTs-0.75Cu exhibited markedly enhanced capacitance and achieved an antibacterial efficiency exceeding 98% against electroactive Pseudomonas aeruginosa. Mechanistic investigations revealed that surface potential fluctuations generated during galvanostatic charge-discharge cycles, together with sustained Cu[2+] release, synergistically downregulated key genes in P. aeruginosa associated with phenazine biosynthesis (phzS) and quorum sensing (lasI, lasR). This dual mode of action effectively disrupted bacterial virulence pathways, compromised membrane integrity, and suppressed sessile biofilm formation. Importantly, the TNTs-Cu platform retained structural integrity and stability under simulated marine conditions, highlighting its environmental compatibility. These findings underscore a sustainable and non-toxic alternative to conventional antifouling coatings, offering significant potential for mitigating ecological risks while extending the service life of titanium-based marine structures.

RevDate: 2025-11-23

Scott AM, Tamrakar S, W Li (2025)

Quantification of a sea lamprey (Petromyzon marinus) pheromone antagonist in river water using ion pairing solid phase extraction coupled with liquid chromatography-tandem mass spectrometry.

Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 1269:124866 pii:S1570-0232(25)00420-9 [Epub ahead of print].

Pheromones mediate species-wide communication for many aquatic organisms, and the measurement of pheromones in natural waters is essential to understanding the environmental context of their function. However, chemical measurement of environmental pheromones and their antagonists is technically demanding and remains underdeveloped relative to assays for characterizing biological functions and application efficacy. In this study, we developed and validated an accurate and sensitive method to quantify a sea lamprey (Petromyzon marinus) pheromone and its antagonists. In this species, males release a multi-component sex pheromone containing 3-keto petromyzonol sulfate (3kPZS) that attracts females, while related compounds petromyzonol sulfate (PZS) and petromyzonol tetrasulfate (3sPZS) antagonize and disrupt female attraction. Developing methods to quantify 3sPZS in river water that contains pheromone is essential for understanding concentration-dependent effects of antagonists on invasive sea lamprey spawning. The target compound 3sPZS was extracted using triethylamine as an ion-pairing reagent during solid phase extraction followed by quantification using liquid chromatography-tandem mass spectrometry. The method showed a limit of detection of 0.1 ng/mL and limit of quantification of 0.5 ng/mL with linearity in the range of 10-1000 ng/mL. The intra- and inter-day accuracy, precision, recovery, and matrix effect of this method were evaluated. The method was applied to quantify 3sPZS, PZS, and 3kPZS in water sampled during field application in a river with sea lamprey and further evaluated for robustness by quantifying 3sPZS in 16 rivers across diverse environmental matrices. Our approach may be adapted to inform management strategies for detecting and mitigating invasive or imperiled aquatic species.

RevDate: 2025-11-22

Olsson SB (2025)

From apathy to advocacy: Insect stewardship for our modern world.

Current opinion in insect science pii:S2214-5745(25)00133-6 [Epub ahead of print].

As human-driven urbanization, environmental change, agricultural intensification, pesticides, pollution, and invasive species expand across the globe, our insect populations face precipitous decline. Meanwhile, the connection of our modern societies with nature mirrors this decline. As academics, we must become active advocates for insect stewardship worldwide. Insect stewardship requires us to move beyond promoting respect for insects and their survival to citizen-led protection and management of insects through habitat protection, ethical considerations, and sustainable practices. This perspective offers a discussion on modern culture's increasing disconnection with insects as well as current interventions to increase insect stewardship based on the COM-B (Capability, Opportunity, Motivation to Behavior) model of behavioral change.

RevDate: 2025-11-22

Neary N, Acosta J, Nelson SC, et al (2025)

The influence of the landscape and removal efforts on the economic damage of the invasive wild pig.

Journal of environmental management, 396:128017 pii:S0301-4797(25)03993-3 [Epub ahead of print].

Non-native, invasive wild pigs (Sus scrofa) continue to inflict both ecological and economic damage throughout North America. Municipalities, agricultural producers, and landowners are seeking solutions for the most economical processes to remove wild pigs from the landscape and evaluate if removal costs provide positive financial returns. Using reports of wild pig damage provided by landowners in the Mississippi Alluvial Valley, we calculated financial costs across the landscape and assess the relationship with crops planted and local pig removal events. We found that pig removal conducted a year prior to damage reports has a significant effect on reducing damage among nearby properties, and that closer removal events are associated with less damage, suggesting farmers and landowners should seek out pig removal options. Using detailed removal data, we estimated the cost of land trapping wild pigs to be $200 per pig, which is substantially less than the cost of pig damage without trapping, indicating that investing in pig removal is well worth the cost. Using data from both land trapping and aerial gunning, we approximated each pig removal within 1 km of a property to be associated with a large reduction (around 40%-60%) of damages, per pig removed, again showing removal to be worthwhile. Furthermore, we found that high-value crops and agronomic fields for wildlife serve as attractive food sources for wild pigs and consumption of crops is responsible for the greatest financial damage in local areas, implying that there is a necessity to understand landscape structure and its role in pig attraction.

RevDate: 2025-11-22
CmpDate: 2025-11-22

D'Andrea R, Barabás G, Dalrymple SE, et al (2025)

Ecological Risk-Benefit Analysis for Assisted Colonization.

Global change biology, 31(11):e70613.

Assisted colonization (AC), translocating a species outside its indigenous range to avoid its extinction, is one of the few conservation options for some species. It is also controversial because of the history of ecological impacts of invasive species, including the extinction of native species as a result of novel ecological interactions resulting from the introduction. Although several national and international organizations have issued guidelines related to AC, none allow case-specific decision-making based on risks and benefits to biodiversity. We propose a two-pronged approach to fill this gap. The first step aims to separate clear-cut cases of AC from those that require an in-depth risk analysis. We propose a set of seven qualitative criteria to identify AC projects that are clearly low-risk and high-benefit, and therefore should not be controversial, and those that are clearly high-risk or low-benefit and therefore should not be attempted. This identifies only the most obvious cases, leaving out many cases to be determined through a quantitative analysis to estimate the probabilities of extirpation of the resident species because of AC, which is the second step of our approach. We propose a roadmap for developing such a system based on community ecology theory, and a framework for considering the estimated probabilities in a global context. Our framework recommends an AC project only if it would result in a larger number of globally extant species than a scenario of no action. We propose large-scale testing of the clear-cut approach, further development of the quantitative approach, and wide consultation for adopting international guidelines for risk assessment of AC projects.

RevDate: 2025-11-21
CmpDate: 2025-11-21

Du Z, Wirtz J, Zhou YJ, et al (2025)

Genome architecture evolution in an invasive copepod species complex.

Nature communications, 16(1):10312.

Chromosomal fusions are hypothesized to facilitate evolutionary adaptation, but empirical evidence has been scarce. Here, we analyze chromosome-level genome sequences of three sibling species within the copepod Eurytemora affinis species complex, known for its remarkable ability to rapidly colonize new habitats. Genomes of this species complex show expansions of ion transport-related gene families, likely related to adaptation to various environmental salinities. Among three genetically distinct sibling species, we discover notable patterns of chromosomal evolution, with chromosomal fusions observed in two different sibling species. As a result of these chromosomal fusions, functionally linked ion transport-related genes located near the telomeres become joined near the newly formed centromeres, where recombination is low. Notably, for the highly invasive E. carolleeae and to a lesser extent for E. gulfia, the ancient chromosomal fusion sites, especially the centromeres, are significantly enriched with contemporary signatures of selection between saline and freshwater populations. This study uncovers intriguing patterns of genome architecture evolution with potentially important implications for mechanisms of adaptive evolution in response to rapid environmental change.

RevDate: 2025-11-22
CmpDate: 2025-11-22

Wu M, Liu H, Shen J, et al (2025)

Utilizing allelopathy from the invasive plant Solidago canadensis to control Microcystis aeruginosa blooms: An integrated metabolomic and bioassay approach.

Journal of hazardous materials, 499:140043.

Harmful algal blooms (HABs) caused by Microcystis aeruginosa threaten aquatic ecosystems and public health, necessitating eco-friendly control strategies. This study investigates the allelopathic potential of the invasive plant Solidago canadensis for cyanobacterial inhibition through metabolite-mediated interactions. Six polarity-based extracts, aqueous (DL), petroleum ether (PE), ethyl acetate (EA), n-butanol (BA), mixed-phase (EA+BA), and residual aqueous (WA), were tested against M. aeruginosa. The DL and PE extracts showed the strongest algicidal activity (>80 % inhibition at 1.0 g/L), inducing oxidative stress (elevated malondialdehyde) and lipid peroxidation. Untargeted metabolomics (HPLC-MS) identified > 5000 metabolites, predominantly lipids, phenylpropanoids, and organoheterocyclic compounds. Multivariate analysis (PCA, OPLS-DA) revealed distinct chemical profiles, with differentially accumulated metabolites (DAMs) enriched in pathways linked to secondary metabolism, phenylpropanoid/flavonoid biosynthesis, and redox homeostasis. Weighted Gene Co-expression Network Analysis (WGCNA) clustered metabolites into ten modules with extract-specific expression patterns. Key allelochemicals, caffeic acid derivatives, flavonoids (e.g., taxifolin, epicatechin), alkaloids (e.g., atropine, vindoline), and indole-related compounds (e.g., indole-3-acetaldoxime), likely synergistically suppress M. aeruginosa via oxidative damage, membrane disruption, and signaling interference. These findings highlight S. canadensis as a sustainable resource for algal bloom mitigation, offering novel metabolite candidates for ecological management.

RevDate: 2025-11-21
CmpDate: 2025-11-21

Wiens JD, Lesmeister DB, Jenkins JMA, et al (2025)

Forest owl community response following the removal of an intraguild invader.

Ecology, 106(11):e70241.

Invasive predators can reshape native predator assemblages, triggering cascading changes in broader wildlife communities. In western North America, the barred owl (Strix varia) is an invasive apex predator with well-documented negative impacts on congeneric northern spotted owls (Strix occidentalis caurina), but impacts on other native forest owls are poorly understood. We coupled a large-scale removal experiment with a passive acoustic monitoring network to quantify species-specific and community-level responses of a five-species assemblage of native forest owls to the lethal removal of invasive barred owls. Our results supported predictions of intraguild predation theory, where smaller bodied, nocturnal species most susceptible to predation and resource competition from larger barred owls benefitted from removal, whereas a diurnally active owl species and a larger bodied species showed little to no response. We conclude that focused management actions limiting the occurrence of barred owls can provide spatial refugia for spotted owls and other sympatric native owl species, thereby promoting forest biodiversity.

RevDate: 2025-11-20
CmpDate: 2025-11-20

Gamba D, Vahsen ML, Maxwell TM, et al (2025)

Local adaptation to climate has facilitated the global invasion of cheatgrass.

Nature communications, 16(1):10203.

Local adaptation may facilitate range expansion during invasions, but the mechanisms underlying successful invasions remain unclear. Cheatgrass (Bromus tectorum), native to Eurasia and Africa, has invaded globally, with severe impacts in western North America. We aim to identify mechanisms and consequences of local adaptation in the North American cheatgrass invasion. We sequence 307 range-wide genotypes and conduct controlled experiments. We find that diverse lineages invaded North America, where long-distance gene flow is common. Nearly half of North American cheatgrass comprises a mosaic of ~19 locally adapted, near-clonal genotypes, each seemingly very successful in a different part of North America. Additionally, ancestry, phenotype, and allele frequency-environment clines in the native range predict those in the invaded range, indicating pre-adapted genotypes colonized different regions. Common gardens show directional selection on flowering time that reverse between warm and cold sites, potentially maintaining clines. In the USA Great Basin, genomic predictions of strong local adaptation identify sites where cheatgrass is most dominant. Our results indicate that multiple introductions and migration within the invaded range fuel local adaptation and success of cheatgrass in western North America. Understanding how environment and gene flow shape adaptation and invasion is critical for managing ongoing invasions.

RevDate: 2025-11-21
CmpDate: 2025-11-21

Thia JA, Hunt BJ, Wang S, et al (2025)

Spread of a Single Superclone Drives Insecticide Resistance in Acyrthosiphon kondoi Across an Invasive Range.

Molecular biology and evolution, 42(11):.

Populations under similar selection pressures may adapt via parallel evolution or dispersal of advantageous alleles. Here, we investigated insecticide resistance in the invasive blue-green aphid, Acyrthosiphon kondoi, which reproduces clonally in Australia and has rapidly developed resistance across geographic locations. Using genomic, transcriptomic, and experimental approaches, we explored the evolutionary origins and molecular mechanisms of resistance. We developed the first nuclear genome assembly for A. kondoi (443.8 Mb, 28,405 annotated genes, BUSCO score 97.5%) and a partial mitochondrial assembly (11,598 bp). All resistant strains shared a common ancestor, supporting the spread of a resistant "superclone" lineage that is distinct from susceptible strains. Resistance was associated with over-expression of an esterase gene that was homologous to E4/FE4 esterases that are linked to resistance in other aphid pests. Functional experiments in Drosophila melanogaster confirmed a causal role of this E4-like esterase in resistance to organophosphates, carbamates, and pyrethroids. These findings highlight how clonal dispersal and insecticide overuse can transform local adaptation into a widespread pest management issue. Our results suggest a parallel macroevolutionary response to insecticide selection in A. kondoi and other aphid species at the gene family level, but with a distinct regulatory mechanism in A. kondoi. Given the rapid spread of the resistant superclone, alternative management strategies, including expanded chemical control options and enhanced biological control, are urgently needed to mitigate this growing pest problem.

RevDate: 2025-11-21
CmpDate: 2025-11-21

Feng D, Cheng J, Tian Z, et al (2025)

A long-term common garden experiment reveals geocytotype-dependent succession of plant community invaded by Solidago canadensis.

Journal of plant research, 138(6):1005-1016.

Invasive alien plants can act as "drivers", actively modifying plant community succession, or as "passengers", passively persisting without significantly affecting vegetation dynamics. Canada goldenrod (Solidago canadensis) is considered a 'passenger' species, transiently dominating old-field communities in Europe, while research in Asia indicates that different geo-cytotypes of S. canadensis influence succession in a cytogeography-dependent manner, with introduced polyploids acting as drivers. However, whether these effects are temporary or long-lasting remains unclear, necessitating long-term observation. We conducted a 10-year common garden experiment to investigate the impact of different geo-cytotypes of S. canadensis on succession in old-field plant communities. Both diploid and native polyploid populations subjected to regular mowing, gradually disappeared, while herbaceous plant communities transitioned to woody communities by the fourth year. In contrast, introduced polyploid S. canadensis co-dominated alongside woody plants until the eighth year. By the tenth year, all communities, including those initially dominated by introduced polyploids, were primarily composed of woody species. While the geo-cytotype influenced the rate of succession, it did not alter its course. These findings suggest that, regardless of geo-cytotype, S. canadensis ultimately functions as a passenger in the long-term succession of invaded plant communities.

RevDate: 2025-11-20

Bhuiyan MKA, Godoy O, González-Ortegón E, et al (2025)

Invasion dynamics and management of the Atlantic blue crab (Callinectes sapidus) in a European salt marsh: Evidence from the Bay of Cádiz, Spain.

Marine pollution bulletin, 223:118972 pii:S0025-326X(25)01448-1 [Epub ahead of print].

Biological invasions are reshaping coastal ecosystems, yet invader performance in aquaculture-influenced salt marsh habitats remains poorly resolved. We conducted an 18-month survey (January 2023-July 2024) at two contrasting salt marsh sites in the Bay of Cádiz, Spain, to compare the invasive Atlantic blue crab (Callinectes sapidus) with the native European green crab (Carcinus maenas). Monthly fyke-net sampling was paired with concurrent prey assessments and water-column measurements. We captured 168 C. sapidus and 1086 C. maenas individuals. Mean abundance (individuals net[-1] 24 h[-1]) was higher for C. sapidus at the Fish site (1.83 ± 0.36) and for C. maenas at the Oyster site (16.28 ± 1.91). Biomass (ash free dry mass, g) was higher for C. sapidus at the Fish site (11.63 ± 2.08 vs 4.58 ± 1.15 at the Oyster site) and for C. maenas at the Oyster site (10.53 ± 1.22 vs 1.12 ± 0.43 at the Fish site). Body sizes mirrored these patterns (C. sapidus at Fish site: +14.5 mm carapace width, +5.9 mm carapace length relative to Oyster site; C. maenas at the Oyster site: +2.7 mm carapace width, +2.3 mm carapace length versus the Fish site; p < 0.05). Seasonal peaks differed (C. sapidus: late spring-early summer; C. maenas: winter-spring), with a winter non detection of C. sapidus. Linear mixed-effects models showed that C. sapidus abundance increased under warmer, macroinfauna-rich conditions, whereas C. maenas was more abundant in cooler, more turbid waters with higher availability of fish and hyperbenthic prey. These patterns suggest thermal-prey pathways in aquaculture-modified salt marshes and provide cues for targeted monitoring, removal, and future management.

RevDate: 2025-11-20

Krushelnycky PD, Melzer MJ, JW Tay (2025)

Evaluation of non-target bait attraction by pollinating insects when using water-storing granules for invasive ant management.

Pest management science [Epub ahead of print].

BACKGROUND: Water-storing granules (WSGs) such as hydrogels are a promising management tool for invasive pest ants because they present attractive sugar-water bait in easily dispersible granular form. However, the attraction of pollinators and other non-target insects to such granules is a concern. We evaluated this non-target risk through staged video observations of baits and field broadcast of protein immunomarked baits using three types of WSG.

RESULTS: Granules staged on the ground attracted few insects from common pollinating groups, which together comprised < 8% of non-ant visitors. However, baits placed near flowers elicited 3.8 times higher visitation rates with > 90% being common pollinators. Broadcast plots that tested small-scale bait application scenarios revealed low rates of insect interaction with WSGs, likely because most granules fell to the ground. Less than 10% of pollinators and approximately 10% of all flying insects captured were marked, although several taxa had substantially higher rates of marking.

CONCLUSION: Ant management using hydrogels or other WSG baits should pose relatively low risk to pollinating insects in the shrubland ecosystems studied. However, higher mortality among some non-target species from direct bait consumption may occur, species-specific effects may be challenging to predict, and indirect risks from pesticide residues should also be considered. © 2025 Society of Chemical Industry.

RevDate: 2025-11-19

Vattiato M, Landro SM, Spaccesi FG, et al (2025)

Tolerance of the apple snail Pomacea canaliculata to individual and combined exposures of the pyrethroid cypermethrin and the tetramic acid spirotetramat.

Chemosphere, 393:144766 pii:S0045-6535(25)00714-3 [Epub ahead of print].

This study evaluated the sensitivity of the apple snail Pomacea canaliculata to the insecticides cypermethrin (CYP), a type II pyrethroid, and spirotetramat (STM), a new-generation tetramic acid. Initially, the LC50 values were determined for adult male and female snails, revealing a high tolerance to both compounds, with values of 65.6 mg/L for CYP and 12.8 mg/L for STM. Subsequently, female snails were exposed to sublethal concentrations of both pesticides individually and in combination for ten days. Several biomarkers, including biochemical parameters and histopathological changes, were studied in the digestive gland. The two-factor ANOVA analysis showed that of all the biochemical parameters evaluated, only total protein, uric acid, glutathione S-transferase, and lactate dehydrogenase activity were affected by individual CYP treatment (0.1 mg/L) compared to the control. Additionally, lactate dehydrogenase activity was affected by individual and combined STM treatments, showing a hormesis pattern. Triacylglycerol content showed no differences between the control and the different treatments. However, the 0.1 mg/L CYP +0.1 mg/L STM treatment resulted in the highest triacylglycerol accumulation. Semi-quantitative analysis of the histopathological index (HI) revealed that the exposure of both CYP and STM led to a significantly higher HI than in controls. However, no dose-dependent pattern was observed, suggesting a high sensitivity of the digestive gland. The integrated biomarker index (IBRv2) analysis showed that CYP caused greater damage than STM. The combined treatment exhibited an antagonistic interaction between CYP and STM. In conclusion, this study demonstrates the high tolerance of P. canaliculata to pesticides from different chemical groups. This remarkable adaptability may explain its success in adverse environmental conditions, establishing it as one of the world's most damaging invasive species. The study also reinforces the value of histopathological changes as the most appropriate and sensitive biomarker for assessing pesticide contamination in this organism.

RevDate: 2025-11-20
CmpDate: 2025-11-20

Yin W, Zhou H, Wu M, et al (2025)

Reassociation of specialist herbivores with an invasive plant selects for reduced allocation to soil mutualists.

The New phytologist, 248(6):3240-3255.

Invasive plants often escape specialist herbivores and can evolve to reallocate resources to growth from defense, but reunion with specialists can reverse this evolutionary trade-off. It remains unclear whether specialist-triggered changes affect soil mutualisms, which can also promote invasion success. Here, we investigate colonization of arbuscular mycorrhizal fungi (AMF) in roots of the invasive Ambrosia artemisiifolia from populations that vary in duration of reassociation with the specialist herbivore Ophraella communa. We then investigated chemically mediated changes in AMF colonization and plant defenses after reassociation with O. communa. Ambrosia artemisiifolia populations with a longer reassociation history had lower AMF colonization rates than populations with shorter or no reassociation history. We detected a genetically based increase in resistance to herbivores but decreased AMF colonization in A. artemisiifolia populations after the reassociation. These changes in antagonisms and mutualisms corresponded with increasing leaf tannins but decreasing fatty acid concentrations in roots and root exudates. These results suggest that reassociation with specialist herbivores may trigger shifts in resource allocation back to herbivore defense and away from plant-AMF mutualisms, providing new insights into links between enemy release and enhanced mutualism, with potential ramifications for the long-term effects of classical biological control programs.

RevDate: 2025-11-20
CmpDate: 2025-11-20

Policelli N, MA Nuñez (2025)

Invasive ectomycorrhizal fungi: belowground insights from South America.

The New phytologist, 248(6):2714-2721.

Ectomycorrhizal fungi (EMF) are essential for nutrient cycling and plant symbiosis, yet their invasions remain understudied, particularly in South America. Large-scale forestry introductions have spread non-native EMF across the continent. Although definitions vary, EMF are invasive when they disperse, colonize new environments, and overcome natural barriers. Invasive EMF alter soil biogeochemistry and local microbial and plant communities, sometimes preceding plant invasions. Despite their importance, invasive EMF remain poorly documented, with major knowledge gaps. Research must strengthen local networks, expand access to molecular tools, and integrate traditional knowledge. In turn, unregulated commercial inoculants pose risks, requiring policy intervention. South America offers a unique opportunity to strengthen collaboration and regional research to help elucidate and prevent future EMF invasions while guiding conservation.

RevDate: 2025-11-20
CmpDate: 2025-11-20

LeFevre G, Estes D, E Rehm (2025)

Better reproductive success of an invasive thistle than its native relative under pollinator exclusion.

Plant biology (Stuttgart, Germany), 27(7):1488-1496.

Invasive plants often can self-pollinate and have higher reproductive outputs than native counterparts. Pollinator declines may exacerbate disparities in reproductive output by negatively impacting native plants more than invasives. To determine how pollinator availability affects reproductive success of two species (one native, one invasive), we conducted a pollinator exclusion experiment for two functionally similar species: the invasive musk thistle Carduus nutans and native field thistle Cirsium discolour. We manipulated pollinator access to flowers by partially or completely excluding pollinators and evaluated how pollinator visitation rates and community composition influenced reproductive success. Both thistle species received pollinators from all seven functional groups that we considered, but pollinator community composition differed by thistle species and treatment. Sweat bees and butterflies were important drivers in community differences between the Ca. nutans and the Ci. discolour flower heads. Complete pollinator exclusion resulted in a higher probability of total reproductive failure; 55% of total pollinator exclusion flowers failed while <7% failed in other treatments. When flower heads produced at least one viable achene, any level of pollinator exclusion resulted in lower seed output, but germination success did not differ from the control. Overall, Ca. nutans had higher reproductive success per flower head than native Ci. discolour in control and partial pollinator exclusion due to higher seed output rather than higher germination rates. While pollinator loss will be detrimental to reproduction of both species, our study provides evidence that reproductive losses in invasive Ca. nutans will be lower than the native Ci. discolour.

RevDate: 2025-11-19
CmpDate: 2025-11-19

Chen Y, Zhang S, Zang W, et al (2025)

Balancing selection of climate adaptive loci underlies the success of introduction of Eurasian Tree Sparrows.

Science advances, 11(47):eadw3797.

Human-mediated introductions have enabled species to colonize beyond their native ranges, yet the mechanisms underlying successful establishment remain unclear. We combined genomic and ecological analyses to investigate parallel introductions of the Eurasian Tree Sparrow across continents. Our analyses of genetic structure and demography revealed that introduced populations in North America (European origin) and Australia (Chinese origin) experienced founder effects, with resulting bottlenecks, reduced genetic diversity, and increased inbreeding. Despite the genome-wide loss of diversity, we identified conserved regions of high genetic variation in the introduced populations, potentially maintained through balancing selection of ancestral polymorphisms. Genotype-climate association and genetic offset modeling demonstrated that climate-adaptive genetic variants retained similar frequencies across the native and introduced ranges, likely maintaining similar interactions of genetic components with climate niches. Our findings highlight how retention of adaptive polymorphism facilitates establishment success in the introduced populations, providing a framework for predicting invasion potential through genomic signatures of adaptation.

RevDate: 2025-11-19
CmpDate: 2025-11-19

Warren RJ (2nd) (2025)

Environmental resistance mediates propagule pressure in a novel plant community.

Oecologia, 207(12):192.

Invasive species success in novel habitats is shaped by the interplay between propagule pressure and environmental resistance. Although high propagule pressure often drives invasion, establishment can fail when strong resistance limits new recruits. Disturbance may reduce resistance by disrupting resident communities and increasing resource availability especially for fast-growing species. To test the generality of these dynamics, Oxalis stricta L. was used as a model invader and turfgrass assemblages as generalized low-diversity systems common in anthropogenic landscapes. In a controlled glasshouse experiment, O. stricta and manipulated environmental resistance were introduced through variation in plant cover, soil moisture, and nutrients. Despite producing more than 400,000 seeds in 17 weeks, O. stricta was almost entirely excluded from vegetated trays (< 2% cover, no reproduction), whereas cover in bare soil often approached 100%. After colonization, seedpod production plateaued at ~ 75% cover, consistent with negative density dependence. Supplemental watering increased O. stricta growth in bare soil, whereas fertilization had little direct effect but shifted turfgrass competition which further suppressed invasion. These results suggest that even extreme propagule pressure is insufficient to overcome strong environmental resistance. At the same time, the ability of O. stricta to self-pollinate and persist in disturbed microsites indicated that minimal founder populations may still establish under fluctuating conditions.

RevDate: 2025-11-19
CmpDate: 2025-11-19

Abba A, Sankarannair S, Ibrahim Y, et al (2025)

A participatory approach to water hyacinth management: Enhancing livelihoods and ecosystem sustainability.

Environmental management, 76(1):3.

Water hyacinth (Eichhornia crassipes) is a highly invasive aquatic species that significantly impacts ecosystems and livelihoods, particularly in rural communities reliant on fisheries and agriculture. The study investigates the impact of water hyacinth proliferation on the livelihoods of communities in coastal Kerala, India, by utilizing the potential of participatory rural appraisal (PRA) for developing sustainable management strategies. Employing qualitative methods, including semi-structured interviews, key informant interviews, focus group discussions, and PRA tools such as resource mapping and seasonal calendars, the research gathered data from farmers, fishermen, and community leaders to explore community-led intervention strategies for sustainable water hyacinth management. The findings reveal that water hyacinth proliferation disrupts water transportation, depletes fish stocks, increases agricultural labor costs, and degrades water quality, leading to biodiversity loss and hindering economic activities, particularly in agriculture and fishing. The study found that 85% of community members identified the impact on fisheries (reduced catch and income) as a primary concern, while 70% reported water transportation disruption due to dense hyacinth mats. Water quality degradation, including increased turbidity and reduced dissolved oxygen levels, was reported by 65% of respondents. The study demonstrates that the utilization of water hyacinth as biofertilizer resulted in a 20% increase in crop yield over a four-month trial period. These findings align with Sustainable Development Goals (SDGs) 6, 8, 11, and 15 by promoting sustainable water management, economic growth, and ecosystem restoration.

RevDate: 2025-11-19
CmpDate: 2025-11-19

Hu L, Qiu J, Zhu X, et al (2025)

Ecological stoichiometric characteristics of Solanum rostratum organs in different habitats.

Frontiers in plant science, 16:1673588.

AIMS: Plant ecological stoichiometry focuses on the elemental content (such as carbon (C), nitrogen (N), and phosphorus (P)) in plant organs and its relationship with environmental factors and ecosystem functions. Alien invasive species ensure their rapid and efficient propagation by regulating their nutrient distribution, and they also influence soil physical and chemical properties by modifying the nutrient cycle and releasing allelochemicals, thus forming an environment conducive to their growth, reproduction, and diffusion. However, evidence on the ecological stoichiometry characteristics of the invasive plant Solanum rostratum and its invaded soils across different habitats in China, particularly the species' nutrient utilization strategies in varying environments, is lacking.

METHODS: This study investigated S. rostratum in Xinjiang Province of China and analyzed the organ allocation of C, N, and P and stoichiometric characteristics across four distinct habitats (irrigation ditches, riparian zones, desert steppes, farmlands) through field surveys and controlled laboratory experiments. In addition, a conceptual framework elucidating S. rostratum's invasion mechanisms, nutrient-use adaptations, and plant-soil feedback was established.

RESULTS: The results demonstrated that S. rostratum exhibits significant stoichiometric adaptation strategies in different habitats, thus providing a scientific foundation for understanding its invasion mechanisms and formulating effective control measures. The results indicated that significant differences in C, N, and P content occurred among the organs of S. rostratum, with a peak in reproductive tissues (flowers, fruits).

CONCLUSION: This priority allocation to reproduction underscores an evolved strategy for optimizing fitness. Moreover, with changes in the invasion degree of S. rostratum, the soil nutrient cycle changed, with obvious differences in the responses of different habitats. This indicates that S. rostratum invasion not only affects its own growth but also affects the nutrient cycle of the whole ecosystem by changing the soil nutrient status. In addition, habitat type had a significant impact on the element accumulation of S. rostratum, and the quantitative relationship between plant and soil elements showed obvious habitat specificity. This phenomenon reflects the driving roles of environmental stress and resource availability on plant growth. S. rostratum adjusts its element absorption and distribution strategies under the environmental and resource conditions of different habitats as an adaptation to environmental changes. Therefore, S. rostratum adapts to heterogeneous environment or heterogeneous condition. Accordingly, differentiated control strategies tailored to its invasion characteristics in distinct habitats should be formulated to enhance its control efficiency.

RevDate: 2025-11-19

Li H, Chen Z, Li T, et al (2025)

Mitigating biofouling in hydraulic infrastructure: a review of Limnoperna fortunei (Dunker, 1857) control technologies.

Biofouling [Epub ahead of print].

Limnoperna fortunei (Dunker, 1857 in GBIF Secretariat (2023)), an invasive species known for its high filtration rate, dense populations, and rapid dispersion, poses a significant threat to freshwater ecosystems in various regions worldwide. In hydraulic infrastructure, L. fortunei biofouling reduces operational efficiency, accelerates infrastructure degradation, shortens equipment lifespan, and poses safety risks and water contamination threats, incurring significant economic costs. Consequently, effective control measures for L. fortunei are urgently needed. Although substantial progress has been made in understanding and managing L. fortunei, with various strategies proposed-such as physical removal, chemical eradication, and biological control - few have been shown to provide long-term, widely applicable solutions in hydraulic engineering. This paper reviews the mechanisms of fouling by L. fortunei and the current prevention strategies, offering a scientific basis and guidance for developing more effective prevention and control technologies.

RevDate: 2025-11-19

Winkler DE, Chapin KJ, Amer WM, et al (2025)

Human-Mediated Dispersal Routes Structure Sahara Mustard Genomics.

Molecular ecology [Epub ahead of print].

Humans have facilitated the spread and evolution of invasive species, a pattern that has accelerated with the globalisation of trade and societal development. Consequently, the invasiveness of a species may be determined not only by how many propagules and which genotypes are introduced, but also by its evolutionary history and how humans have interacted with it. Here, we document the population structure and movement of Sahara mustard (Brassica tournefortii) within its native range and its invaded U.S. and Australian ranges. We evaluated 312 individuals spanning 31 sites. We found that Sahara mustard has likely undergone substantial mixing within its native range, with genotypes from Egypt potentially representing a human-created connection between North African, European and West Asian genotypes. Our results suggest Egypt-and perhaps closely related populations in Morocco and France-as the likely origin of invasive U.S. populations. Australian accessions appear most closely related to those from Qatar and may have acted as a bridgehead and potential source of the most-recently introduced U.S. population. Further, agricultural varieties from Pakistan and India represent a mix of genotypes from the western part of the species' native range and the eastern site in Qatar. We also identified evidence of mixing of some accessions of crop wild relatives. Nearly all populations sampled display excess heterozygosity and negative inbreeding coefficients, likely indicative of selection and potential admixture with other cultivated Brassica species. Overall, we reconstructed the probable invasion history of Sahara mustard, inferring significant human-mediated movement of the species within and beyond its native distribution.

RevDate: 2025-11-19
CmpDate: 2025-11-19

Noble SAA, Ali RLMN, Wilson-Clarke CF, et al (2025)

Detection of invasive Aedes vittatus mosquitoes in Jamaica: molecular identification and surveillance implications.

Parasites & vectors, 18(1):469.

BACKGROUND: Aedes vittatus, an emerging invasive mosquito of significant public health concern has slowly made its way onto the global radar. With a known geographical range in Africa and Asia, where it is a competent vector for several arboviruses, this mosquito has now been reported in the Americas. As the spread of this mosquito has been partly linked to transcontinental trade and travel, Jamaica, the largest English-speaking country in the Caribbean, which serves as a central hub for trade and transport throughout the region, has been on alert since its identification in neighboring Dominican Republic and Cuba.

METHOD: BG sentinel traps baited with dry ice and a Prokopack aspirator were used to collect adult mosquitoes whereas disposable plastic pipettes were utilized for the collection of immature stages. Larvae were reared to adults, and all mosquitoes were identified using taxonomic keys. Using a genome skimming approach, the mitochondrial genome from two specimens was sequenced and a section of the cytochrome c oxidase subunit I gene was extracted from each mitochondrial genome and used for phylogenetic analysis.

RESULTS: Through ongoing surveillance efforts from January 2023 to October 2024, we report the detection of Ae. vittatus across six locations in four parishes in Jamaica. Both larvae and adults were collected from rural and urban areas in the country. Additionally, we present the first complete annotated mitochondrial genomes from two specimens of this invasive mosquito species. Phylogenetic analysis using the cytochrome c oxidase subunit I gene extracted from the derived mitochondrial genomes of Jamaican Ae. vittatus and available sequences from the GenBank database revealed clustering with specimens from Cuba, Nepal, and India.

CONCLUSIONS: This study is the first confirmed report of Ae. vittatus in Jamaica. Furthermore, it highlights the benefits of routine surveillance and the power of molecular approaches to identify invasive species and their potential origins.

RevDate: 2025-11-18
CmpDate: 2025-11-19

Galià-Camps C, Schell T, Pegueroles C, et al (2025)

De novo genome assembly, inversion detection, and worldwide adaptation on the invasive species Styela plicata.

Scientific reports, 15(1):40328.

Biological invasions are a major threat to biodiversity. However, genomic resources of invasive species are scarce, compromising the study of their invasive success and our ability to mitigate their effects. Here, we assemble and annotate the reference chromosome-level genome of the invasive ascidian Styela plicata, and complement it with whole genome sequencing data from 24 individuals worldwide. We developed and validated the novel method "individual Detection of linkage by Genotyping" (iDlG), that allowed identifying four large chromosomal inversions and assigning karyotypes at the individual level. The four inversions are polymorphic throughout the species' distribution range and are enriched with genes that potentially influence fitness in estuarine and harbor environments, where Styela plicata thrives. It was only after we removed the inversions that we could detect clear population structuring, both between and within oceans, driven by several candidate adaptive genes involved in osmoregulation and other functions. Moreover, we recovered three major mitogenomic lineages, two of them globally sympatric and one specific to a single population. Interestingly, mitochondrial lineages show associations with nuclear genes likely involved in correct mitochondrion distribution during cell division. Our study highlights the importance of generating annotated reference genomes and combining them with whole genome sequencing data across whole distribution ranges to identify species' structural and sequence variation for understanding complex evolutionary processes.

RevDate: 2025-11-19
CmpDate: 2025-11-19

Milardi M, Wood LE, Nyboer EA, et al (2025)

Global recreational consumption of non-native inland fish: higher economic benefits, but lower nutritional value and climate resilience.

The Science of the total environment, 1005:180872.

Inland recreational fisheries are globally significant leisure pursuits, with well-documented benefits to human health and well-being, but also one of the principal drivers of non-native fish introductions to enhance fishing opportunities, whether for sport or sustenance. In this study, we assess the relative reliance of global inland recreational fisheries on non-native versus native species for harvest. We further examine how this reliance varies by economic and nutritional value as well as the climate vulnerability of the species involved. We demonstrate that, of the 1,325,851 t of inland recreational fishes recreationally harvested for consumption worldwide in 2021, non-native fish were a small proportion (4 %; 53,651 t). On a global scale, non-native fish contributed a net positive 38.2 % economic value to inland recreational harvest. However, they also contributed a net negative -21.9 % nutritional value to inland recreational harvest. Non-native fishes were also more climate vulnerable (i.e., higher average climate vulnerability index values) and thus proportionally increased overall estimates of climate vulnerability with a net positive of 70.9 %. Our results quantitatively demonstrate that non-native species play a more important role in inland consumptive recreational fisheries than their mere harvest volume would suggest. However, many nuances were seen on the continent and country scale, which reflect the complexity of fisher behavior, fish distribution and socio-economic factors. Our findings help unravel the complex effects of non-native species on human activities and underscore the need to evaluate their global impacts holistically.

RevDate: 2025-11-19
CmpDate: 2025-11-19

Rumschlag SL, Gallagher B, Hill R, et al (2025)

Diverging fish biodiversity trends in cold and warm rivers and streams.

Nature, 647(8090):656-662.

Worldwide, freshwater systems contain more than 18,000 fish species[1-3], which are critical to the functioning of these ecosystems[4] and are vital cultural and economic resources to humans[5-7]; despite this value, fish biodiversity is at risk globally[8,9]. In the USA, leading threats to fish communities in rivers and streams include climate change and invasive fish introductions and game fish stocking by humans[10-14]. Here we harmonized US federal biomonitoring datasets with 389 species spanning 27 years (1993-2019) and 2,992 sites to analyse trends in fish biodiversity. In cold streams (past summer stream temperatures below 15.4 °C), fish abundance and richness declined by 53.4% and 32% over 27 years, respectively, and uniqueness increased. Periodic (large-bodied, late-maturing) fishes increased, and opportunists (small-bodied, short generation time, 'r-selected') decreased, possibly due to proliferation of native or introduced game fishes. In warm streams (stream temperatures greater than 23.8 °C), fish abundance and richness increased by 70.5% and 15.6% over 27 years, respectively, and communities homogenized. Small opportunistic fishes replaced large periodic fishes. Intermediate streams (stream temperatures 15.4-23.8 °C), representing the average stream, had minimal changes in fish biodiversity through time. Interactions between warming and introduced fish were associated with increased rates of degradation to local fish biodiversity. Given the magnitude of these changes in a relatively short time span, there is an urgent need to curb degradation of fish biodiversity caused by fish introductions and warming water temperatures.

RevDate: 2025-11-18
CmpDate: 2025-11-18

Gonhi P, I Mahakata (2025)

An assessment of human and natural processes related direct threats to terrestrial protected areas in the Eastern Highlands Region, Zimbabwe.

Environmental monitoring and assessment, 197(12):1348.

Protected areas (PAs) are subjected to threats that make biodiversity conservation programs fragile if not understood and addressed properly. This study identified type, scope, severity, timing, and frequency of direct threats affecting eight PAs (i.e., Nyanga, Chimanimani, Vumba, Bunga, Haroni, Rusitu, Osborne, and Eland Sanctuary) located in Eastern Highlands region of Zimbabwe. Data on local direct threats from published and unpublished literature, questionnaires, and field surveys were assembled. Forty participants from eight PAs were interviewed and asked to rank existing threats in their respective PAs. Threats were coded using the IUCN-Conservation Measures Partnership Unified Classification of direct threats. Common threats recorded across all eight PAs were fires, siltation, hunting and collecting terrestrial animals/plants, trespassing, flooding and shallow landslides, invasive plant species, droughts, and habitat shifting and alteration. There were significant differences in the scope and number of threats between Vumba and Nyanga (p = 0.001), Osborne and Rusitu (p = 0.025), Vumba and Osborne (p = 0.0002), Vumba and Haroni (p = 0.010), Chimanimani and Vumba (p = 0.018), Vumba and Eland Sanctuary (p = 0.010), and Rusitu and Vumba (p = 0.025) at p-critical = 0.05. Participants' views on threat severity showed no significant difference across the landscape (p = 0.835). PA managers should prioritize reducing direct threats of very high scopes and severity before losing biodiversity integrity.

RevDate: 2025-11-17

Aduldejcharas R (2025)

Integration of Pomacea canaliculata shell waste for low-carbon sustainable creative material design.

Scientific reports, 15(1):40142.

In this study we investigated the properties of compressed earth bricks (CEBs) with a cement-to-soil ratio of 1:5 by weight and incorporating 25%, 50%, 75%, and 100% Pomacea canaliculata shell waste as a replacement for the cement. These materials were tested in interlocking double-walled structures.The best mechanical performance was obtained at the 25% cement replacement level and showed a compressive strength of 104.90 kN, which is greater than the Thai Industrial Standard (TIS 602/2547) for non-load-bearing bricks. The peak density was 2434.5 kg/m3 and occurred at 50% cement replacement and the water absorption was between 16.05% and 17.43%. Calcium carbonate in the form of aragonite and calcite was confirmed using X-ray diffraction (XRD) and X-ray fluorescence (XRF). These two minerals form calcium-silicate-hydrate (C-S-H) gel on reaction with soil silica and alumina, resulting in greater strength.A double-walled system constructed from 64 bricks was confirmed as structurally stable and with efficient stress distribution (maximum stress = 83.91 MPa) through Finite Element Analysis (FEA) using ANSYS software.The approach we describe supports the United Nations Sustainable Development Goals (SDGs 11, 12, and 13) by reducing the demand for cement and the CO2 emissions from its production. It also supports these SDGs by valorising what would otherwise be only agricultural waste, and directly addresses the problems associated with invasive species. To conclude, the approach we put forward provides a feasible method for utilising local agricultural waste to produce a product that has structural reliability is environmentally sustainable.

RevDate: 2025-11-17
CmpDate: 2025-11-17

Gomontean B, Pingal AC, K Khamthong (2025)

Modeling invasion risk of Mimosa pigra L. in Northeastern Thailand using Bayesian count models.

Scientific reports, 15(1):40156.

Mimosa pigra L. is a globally significant invasive species that threatens wetland and agricultural ecosystems across the tropics. This study models its population density (plants per square meter) in northeastern Thailand using Bayesian Poisson and negative binomial regression, incorporating soil physicochemical properties as predictors. Data were collected from 50 plots across three districts in Maha Sarakham Province, with analyses of soil pH, organic matter, phosphorus, potassium, and electrical conductivity. Model performance was assessed via the Leave-One-Out Information Criterion (LOOIC) and posterior predictive checks. The negative binomial model provided a superior fit by capturing overdispersion, identifying potassium concentration, soil texture classes (e.g., clay loam, sandy clay), stem diameter, and soil structure as key determinants of M. pigra density. This work represents the first Bayesian quantification of edaphic drivers of M. pigra in Southeast Asia, demonstrating the utility of Bayesian count models for invasion ecology and offering practical guidance for habitat prioritization, early detection, and targeted management in high-risk floodplain ecosystems.

RevDate: 2025-11-17
CmpDate: 2025-11-17

Kolbe JJ, Giery ST, Petherick AS, et al (2025)

Morphological and genomic responses to hurricanes arise and persist during a biological invasion.

Proceedings of the National Academy of Sciences of the United States of America, 122(47):e2517322122.

Hurricanes can be a source of strong, episodic natural selection, especially for coastal and island populations. In Anolis lizards, selection favors morphological traits that enhance clinging performance under hurricane-force winds. However, we know little about the longer-term persistence of morphological and genomic responses to these pulse-like events. To address this limitation, we capitalized on the well-documented history of hurricanes and spread of the invasive brown anole lizard, Anolis sagrei, over the past 130 y in the southeastern United States. We used 30 sites with estimates of the number of hurricanes experienced since population establishment. We found that hurricane frequency is consistently related to morphological trait values that increase clinging performance-longer limbs and larger toepads. In contrast, traits with no known connection to clinging ability were not related to hurricane frequency. Our genomic results show that despite a complex genetic architecture for most traits, populations retain a signature of hurricane-mediated selection, with several loci being strongly associated with both hurricane frequency and longer limbs. Further, we found that hurricanes are a more persistent driver of among-population genomic differentiation than other environmental variables. These results solidify hurricanes as a major force shaping morphological and genomic variation in Anolis lizards. They also highlight how the evolutionary trajectories of populations will likely be altered as climate change modifies historical patterns of natural selection, such as those involving extreme weather events.

RevDate: 2025-11-17

Cannon SL, MR Helmus (2025)

Honeydew and feeding-wound exudate from invasive spotted lanternfly (Hemiptera: Fulgoridae) on invasive tree-of-heaven (Sapindales: Simaroubaceae) subsidize North American pollinators, parasitoids, and other invertebrates.

Environmental entomology pii:8325478 [Epub ahead of print].

When sap-feeding insects invade ecosystems, they create novel resource subsidies by exposing previously unavailable resources to resident consumers. Spotted lanternfly, Lycorma delicatula (White), is an invasive phloem-feeding planthopper native to Asia that has spread across multiple US states since its 2014 detection in Pennsylvania. It heavily feeds on tree-of-heaven, Ailanthus altissima (Mill.) Swingle, an invasive tree naturalized across the United States that previously lacked sap-feeders. During feeding, L. delicatula excretes honeydew and creates sap-exuding wounds, providing carbohydrate resources. Here, we document invertebrates consuming these subsidies in southeastern Pennsylvania from June to October 2021. At 43 sites sampled 3 times, we measured L. delicatula biomass via circle trunk traps and recorded 1,576 feeding observations through visual surveys. These observations were made up predominantly of Hymenoptera (78.0%) and Diptera (19.5%), with smaller proportions of Coleoptera (0.76%), Lepidoptera (0.44%), Hemiptera (0.44%), Orthoptera (0.38%), Opiliones (0.38%), and Stylommatophora (0.06%). Among Hymenoptera, we identified 33 species (29 native, 4 introduced) from 13 families, including key pollinators and parasitoids. The invasive wasp, Vespa crabro, was abundant and exhibited aggressive behaviors toward native consumers, including pollinators. Using redundancy analysis, we tested whether spatiotemporal variation in L. delicatula biomass explained the composition of honeydew-feeding Hymenoptera compared to other environmental factors. Lycorma delicatula biomass was the strongest predictor of Hymenoptera community composition, with temperature, landscape-scale impervious surface, and site-scale vegetation structure also contributing. The L. delicatula invasion has created novel resource subsidies for many invertebrates and altered temporal dynamics of Hymenoptera, with potential cascading effects on pollination and biocontrol ecosystem services.

RevDate: 2025-11-17

Hoddle MS, Hoddle CD, Lewis M, et al (2025)

Phenology of Rhynchophorus palmarum and associated Phoenix canariensis mortality in Southern California.

Environmental entomology pii:8325479 [Epub ahead of print].

Rhynchophorus palmarum, an invasive palm pest in San Diego County California, has killed thousands of Phoenix canariensis. Over July 2016 to December 2022, this study tracked the population phenology of R. palmarum. Trapping data, derived from the capture of 8,262 weevils, of which 65% were female, indicated strong and predictable seasonal patterns in adult weevil activity, with trap captures increasing after March, peaking in July, before declining steadily towards December. Approximately 80% of weevils were trapped between April and October. This finding has important implications for the timing of management practices. Frond pruning should be done over November to March when weevil flight activity is low, and prophylactic insecticide applications should be made in March and June prior to increased weevil flight activity in April and July. Temperature and day length were strongly correlated with weevil capture rates, while precipitation, wind speed, and relative humidity were not. In urban areas over a 7-year survey period, August 2016 to August 2023, palm mortality rates, based on observations of 521 palms, indicated that 68% were killed. Drone surveys of 637 wilding P. canariensis in the Sweetwater Reserve exhibited a 73% rate of mortality over August 2016 to August 2023. Strong cardinal effects were observed for palm mortality in urban areas with west and east quadrants exhibiting higher rates of mortality in comparison to palms in north and south quadrants. In urban areas, weevil killed palms were removed on average, after 400 days, at an estimated average cost of $2,861 per palm.

RevDate: 2025-11-17
CmpDate: 2025-11-17

Hedensjö A, Strand Å, AT Laugen (2025)

Habitat Preferences at the Leading Edge of a Marine Bioinvasion.

Ecology and evolution, 15(11):e72475 pii:ECE372475.

To enable the early detection and eradication of invasive species, it is crucial to predict habitats with an elevated risk of invasion. Despite the fact that invaders may display initial habitat preferences and niche shifts during range expansion, studies identifying habitat associations at invasion fronts are lacking, especially those considering abundance distributions. We developed a targeted Habitat Suitability Modeling approach to predict invasion risk, focusing on the Pacific oyster (Magallana gigas) invasion front on the Swedish southwest coast. We show that marinas act as environmental "hotspots" for pioneering non-native populations across broad spatial scales. The abundance observed in marinas (10.4 ind. m[-2]) was higher than that in both piers (3.3 ind. m[-2]) and natural rocky habitats (2.8 ind. m[-2]). In terms of invasion risk, marinas were predicted to promote seven times higher oyster abundance and 20 times higher oyster biomass per unit area than natural rocky habitats. While the availability of stable hard substrate influenced presence, shelter from waves influenced abundance, demonstrating the ecological distinction between species occurrence and abundance distributions with important management implications. Moreover, supporting recent genetic findings, our model reveals an unexpected low-salinity tolerance at the invasion front, suggesting that range expansion may rather be limited by a lack of stable substrate. Our study provides novel insights into the dynamics of marine bioinvasions at leading range edges and offers a practical tool to inform early detection and proactive management of marine invasions, especially in commonly invaded anthropogenically structured habitats such as marinas.

RevDate: 2025-11-16
CmpDate: 2025-11-16

Beatty MA, Brack IV, Holt RD, et al (2025)

An invasive prey alters local and landscape contributions of sources and sinks for an endangered predator.

Ecology, 106(11):e70242.

Source-sink dynamics are a cornerstone of theory for spatially structured populations. Despite long-standing interest, understanding temporal variation in source-sink dynamics in wild populations remains rare. Biological invasions have the potential to alter source-sink dynamics for native species, which may change over time as invasions proceed. We used 28 years of data on reproduction, movement, and survival to estimate annual source-sink dynamics across the entire range of the endangered Everglade snail kite (Rostrhamus sociabilis plumbeus) during the invasion of a novel prey species, the island apple snail (Pomacea maculata). Snail kite populations underwent striking changes in source-sink dynamics with time since invasion, and no population was consistently a source or sink over time. Some initial benefits of increased prey availability on snail kite demography were diminished in the long term. Populations invaded by P. maculata impacted uninvaded populations via changes in snail kite retention (i.e., lack of movement) and emigration across the metapopulation. Our findings illustrate how effects of biological invasions can change over time and may take decades to fully emerge, and they emphasize how an invasive species can have distant impacts on uninvaded populations via fluctuations in native species' local retention and emigration. In addition, our results demonstrate how fluctuating emigration and retention alter long-term interpretations of source-sink dynamics through variation in local versus landscape contributions of populations to the metapopulation, highlighting that the status of "source" or "sink" can be highly variable through time.

RevDate: 2025-11-16
CmpDate: 2025-11-16

Chen D, Cai AM, Wang YJ, et al (2025)

Competitive superiority of aliens over natives under abiotic and biotic stresses in legume and nonlegume woody species.

Ecology, 106(11):e70252.

Resource utilization is considered a crucial determinant of alien plant species in terrestrial ecosystems under abiotic and biotic conditions of global change. Alien plants are often favored over natives in stress-free or resource-rich ecosystems. However, certain resource-poor ecosystems have also been heavily invaded, particularly by legume woody species. How alien and native woody species compete in various abiotic and biotic stress environments and whether the functional traits associated with resource utilization promote their performance remain unknown. To test this, we grew six naturalized alien and six native woody species, grouped into three pairs of legumes and three pairs of nonlegumes, individually or in competition, under benign and two abiotic stress (drought, limited nutrients) and two biotic stress (aboveground enemies, belowground enemies) conditions. Overall, the four stress conditions had more negative effects on native plants than on alien ones, especially for nonlegumes under abiotic stresses. Moreover, when grown in competition, the presence of stress increased the growth asymmetry between alien and native plants in favor of the alien plants, but this was less pronounced in the legume group than in the non-legume group. Our study suggests that alien woody plants may have a competitive advantage over native ones under diverse abiotic and biotic stress conditions, but that this depends on their nitrogen-fixing ability. This is likely to affect the coexistence of alien and native woody species and may facilitate the spread of alien plants into stressful habitats.

RevDate: 2025-11-16

Gaglio M, Gavioli A, Turolla E, et al (2025)

The costs of an invasion: How the blue crab impaired ecosystem services in the most productive lagoon of northwestern Adriatic.

The Science of the total environment, 1007:180952 pii:S0048-9697(25)02592-6 [Epub ahead of print].

The introduction of non-native species can disrupt ecological processes and impair ecosystem services, particularly in intensively exploited systems such as coastal lagoons. The Atlantic blue crab (Callinectes sapidus) has recently expanded rapidly in the northern Adriatic, raising ecological and economic concerns. This study documents and evaluates its impact on provisioning services in the Sacca di Goro lagoon (Po Delta, Northern Italy), the most productive site for Manila clam in Europe. Net revenues from the emerging blue crab supply chain were also assessed by accounting for sales and disposal costs. Crab abundance showed no association with environmental variables. By contrast, a statistically significant negative relationship was detected with Manila clam production, which declined by 71.8 %, corresponding to annual losses of about €65 million. Small-scale fisheries also recorded reduced catches of native and commercially valuable species, with estimated losses of €0.18 million yr[-1]. Revenues from the blue crab supply chain were positive in 2023 (+€0.41 million yr[-1]) but turned negative in 2024 (-€0.71 million yr[-1]) due to disposal costs and falling market prices. Thus, to date, not only are the revenues from blue crab sales negligible, but they are also outweighed by the high costs of disposal. This case shows how invasive species can simultaneously erode biodiversity and ecosystem services while failing to provide viable alternatives. It provides quantitative evidence of aquatic invasion costs and highlights the importance of integrating such assessments into ecosystem-based management and policy.

RevDate: 2025-11-15

Mandák B, Habibi F, Čortan D, et al (2025)

Multiple origins, singular success: genomic evidence for past recurrent hybridization in Chenopodium album s. Str. (Amaranthaceae).

Molecular phylogenetics and evolution pii:S1055-7903(25)00217-9 [Epub ahead of print].

Polyploidy, particularly allopolyploidy resulting from interspecific hybridization followed by chromosome duplication, plays a key role in plant diversification and ecological success. Chenopodium album s. str. is one of the world's most widespread and morphologically variable weeds, yet the timing and mechanism of its origin as an allohexaploid (2n = 6x = 54) remained unresolved. Using RADseq data, this study investigated the origin of 'BBCCDD' allohexaploid C. album s. str. and closely related hexaploid taxa by analyzing their relationship to putative diploid progenitors with the 'BB' genome (C. ficifolium, C. suecicum, C. ucrainicum) and tetraploid species with the 'CCDD' subgenomic combination (C. betaceum, C. glaucophyllum, C. novopokrovskyanum, C. striatiforme). The genomic sequences were mapped to the chromosome-scale reference genome of C. formosanum, a closely related allohexaploid. Results reveal that C. album s. str. does not genetically align with contemporary diploid or tetraploid taxa, suggesting its origin from extinct ancestors rather than ongoing hybridization. Both its 'BB' and 'CCDD' subgenomes show higher or comparable number of genetic lineages, respectively, than its extant di- and tetraploid relatives, implying conservation of ancestral variation in the allohexaploid. Furthermore, 16 distinct subgenomic combinations were identified within C. album s. str., confirming its polytopic and repeated origin across geographic regions. This explains the remarkable morphological and ecological plasticity observed across its range. This research underscores C. album s. str. as an ancient, stabilized, and globally invasive polyploid, shaped by multiple hybridization events and fixed heterozygosity, offering parallels with other polyploid species such as Triticum/Aegilops complex.

RevDate: 2025-11-15

Batista D, Mizrahi D, Calado L, et al (2025)

Record of orange cup coral Tubastraea coccinea Lesson, 1830 and other non-indigenous species transported by an offshore supply vessel in Brazil (SW Atlantic).

Marine pollution bulletin, 223:118970 pii:S0025-326X(25)01446-8 [Epub ahead of print].

RevDate: 2025-11-15

Gil-Vives L, Compa M, Sureda A, et al (2025)

Impacts of the Invasive Moth Cydalima perspectalis on the Native Shrub Buxus balearica in Mallorca (Spain).

Chemistry & biodiversity [Epub ahead of print].

The box tree moth (Cydalima perspectalis) is an invasive lepidopteran that has rapidly spread across Europe, causing severe defoliation of the Buxus species. In the Balearic Islands, the endemic Buxus balearica is vulnerable due to its restricted distribution and protected status. This study assessed the physiological response of B. balearica to C. perspectalis herbivory by measuring oxidative stress markers and antioxidant defenses. Leaf samples were collected in Mallorca from unaffected plants, mildly defoliated individuals (<25% leaf area loss), and severely defoliated individuals (>70%). Biochemical assays revealed that mildly affected plants exhibited an increase in superoxide dismutase (SOD), glutathione peroxidase (GPx) activities, and total glutathione (tGSH), indicating a compensatory antioxidant response. Conversely, severely defoliated plants showed marked declines in SOD, GPx, and tGSH, accompanied by elevated malondialdehyde concentrations and reduced polyphenol content, reflecting lipid peroxidation and metabolic exhaustion. A field survey conducted in May 2025 confirmed that all adult B. balearica specimens were dead, with only juvenile shoots under 1 m surviving. These findings demonstrate that while B. balearica can initially mount biochemical defenses against C. perspectalis, but continuous herbivory overwhelms its capacity. Urgent monitoring and control strategies are necessary to protect this species, especially in vulnerable habitats.

RevDate: 2025-11-15
CmpDate: 2025-11-15

Cambronero-Heinrichs JC, Pepori AL, Pecori F, et al (2025)

Microbial Interactions Support the Role of Ambrosia Beetles as Potential Vectors of Dutch Elm Disease.

Microbial ecology, 88(1):124.

Dutch elm disease (DED) has caused devastating pandemics in natural elm populations across Europe, North America, and Asia. The primary vectors of DED are native elm-associated bark beetles of the genus Scolytus. However, there is evidence suggesting that ambrosia beetles may also carry Ophiostoma novo-ulmi and potentially transmit it to elm trees. In this study, we explored microbial interactions and host selection mechanisms that could support the role of ambrosia beetles as vectors of O. novo-ulmi. Our study showed that females of Anisandrus dispar, Xyleborinus saxesenii, Xylosandrus crassiusculus, and Xylosandrus germanus emerging from both DED-infected and healthy elm logs carried O. novo-ulmi DNA. Furthermore, we showed that none of the tested ambrosia beetle fungal symbionts was adversely affected by O. novo-ulmi, while Dryadomyces spp. and the bacterial symbiont Erwinia sp. 1C4 partially restricted or inhibited O. novo-ulmi growth without fully suppressing it. Overall, these findings provide additional evidence supporting the potential role of ambrosia beetles as vectors of DED and emphasize the need for further research on this understudied insect-pathogen relationship.

RevDate: 2025-11-14

Fong PP, MP Nieman (2025)

Warmer temperatures increase egg laying and egg hatching frequency in the invasive freshwater snail Physa gyrina from Pennsylvania, USA.

Environmental science and pollution research international [Epub ahead of print].

Climate change continues to impact populations of organisms and to affect physiological adaptations to their environments. Freshwater snails have been so impacted globally, not only by climate change, but by the concomitant exposure to environmental pollutants like human antidepressants released from wastewater treatment plants. To test the effect of climate change and antidepressants, we exposed the freshwater snail, Physa gyrina to three temperatures (12 °C, 20 °C, and 25 °C) and to a concentration of the antidepressant fluoxetine, known to modulate snail behavior, and measured time to egg laying and egg hatching. Snails exposed to 20 °C and 25 °C laid significantly more egg masses sooner than snails at 12 °C. Embryos hatched from egg masses significantly sooner at the two warmer temperatures than those at 12 °C. Exposure to fluoxetine had only a minor effect on the timing of egg laying and no effect on the timing of egg hatching. Our findings suggest that warmer temperatures may be more important in modulating reproduction in P. gyrina than fluoxdetine fluoxetine. Since this species is invasive in Europe, we discuss our results in terms of the possible consequences of climate change on the potential geographical spread of invasive species.

RevDate: 2025-11-15
CmpDate: 2025-11-15

Simão J, Ferreira GDDS, Barbosa LR, et al (2025)

Climatically suitable areas for Hylobius abietis and Hylobius pales: a global and regional analysis considering economic risks for pine production.

Pest management science, 81(12):8477-8486.

BACKGROUND: The weevils Hylobius abietis and Hylobius pales are major pests of pine species within their native ranges. Their potential spread to Pinus-producing regions outside these areas could result in substantial economic and ecological losses, underscoring the need for studies that identify regions at greater risk of invasion.

RESULTS: Climate suitability maps, generated using the MaxEnt machine learning algorithm, identified climatically suitable areas for H. abietis and H. pales in multiple regions beyond their native ranges. These areas include several Pinus-producing countries in the Southern Hemisphere (e.g., Australia, Brazil, Chile, New Zealand, South Africa), as well as locations near ports, airports, or major international trade hubs. In Brazil, 68.1% of Pinus-producing areas fall within the suitable range for H. abietis, while 91.5% of cultivated Pinus areas are suitable range for H. pales. Among the 588 Pinus-producing municipalities, 48 depend on this economic activity to a moderate or high degree. Additionally, the analysis revealed that 42.0% of these municipalities face a moderate to high economic risk in the event of an invasion by H. abietis, while 90.5% are at risk from H. pales.

CONCLUSION: Our results highlight the importance of incorporating region-specific data to improve invasion risk map accuracy and guide preventive actions against two major forest pests. Most Pinus-producing municipalities in Brazil face moderate to high economic risk from potential invasions by H. abietis and H. pales, emphasizing the need for proactive prevention strategies. © 2025 The Author(s). Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.

RevDate: 2025-11-15
CmpDate: 2025-11-15

Balogh C, Kobak J, Z Serfőző (2025)

Lipid storage may help invasive mussels to survive in limited food conditions.

Integrative zoology, 20(6):1340-1344.

The flow direction forms a west-east nutrient gradient in Lake Balaton and separates two basins with different food conditions indicated by the annual mean of water chlorophyll-a concentration. Trends of protein and carbohydrate contents of the invasive quagga mussel decline along the longitudinal coordinates, whereas lipids increase in mussels living between the two basins under moderate food conditions. Lipid accumulation might rescue the mussels when carbohydrate stores deplete.

RevDate: 2025-11-14

Gallitelli L, Marcellucci C, Iberite M, et al (2025)

Spatiotemporal patterns of plastic entrapment by the invasive water hyacinth (Pontederia crassipes Mart.) in temperate South European Rivers.

The Science of the total environment, 1006:180945 pii:S0048-9697(25)02585-9 [Epub ahead of print].

The water hyacinth Pontederia crassipes Mart., native to Brazilian watercourses, has become among the most widespread and risky alien species globally. Introduced in Europe and Italy as an ornamental species, it has many detrimental effects on native biota and ecosystem functioning. However, it can filter water from contaminants, organic pollution and plastics. In central Italy, P. crassipes was first recorded in the Lazio region's Pontine plains in 1983. Given the neglect of the dispersal path, we (1) investigated the distribution along rivers in central Italy and (2) assessed plastic entrapment in small temperate rivers. Specifically, we compared recent field observations with historical records to evaluate trends in both species presence and associated macrolitter accumulation. Our findings reveal that P. crassipes spread in the Amaseno, Sisto, and Ufente rivers in agricultural land use, with historical invasions of P. crassipes in the Pontine area covering up to 20,000 m[2]. Recent surveys identified two new records totaling 67.2 m[2] in small canal. Plastic entrapment ranged between 0.0 items/m[2] and 2.2 items/m[2]. Precisely, the maximum plastic entrapment was found in "The small canal" (max: 2.2 items/m[2]) and in a canal in the Ufente river (max: 1.7 items/m[2]). Among polymers, PET was the dominant polymer (55.1 %), followed by EPS/PS and PO soft items (21.3 % and 16.9 %, respectively). Over the years, macrolitter density was highest in 2005 and 2024 (i.e., 1.7 and 2.2 items/m[2], respectively). These results might be pivotal to understanding future actions on species eradication as well as on clean-up activities using this alien species.

RevDate: 2025-11-14

Saberi H, Yousefi AR, Pouryousef M, et al (2025)

Chemical Characterization and Allelopathic Effects of Ambrosia psilostachya (Asteraceae).

Chemistry & biodiversity [Epub ahead of print].

Ambrosia spp. have been introduced and distributed across different continents as an invasive alien plant species. The present study aimed to identify the chemical components of essential oil isolated from different parts of Ambrosia psilostachya and evaluate the phytotoxic effect of its aqueous extracts on the growth parameters of Phaseolus vulgaris L. (bean) and Arachis hypogaea L. (peanut) under greenhouse conditions. The chemical components of the essential oil of A. psilostachya were analyzed by gas chromatography-mass spectrometry. Total 44 compounds, including isoaromadendrene epoxide (17.38 %), citral (15.13 %), caryophyllene (7.23 %), borneol (8.76%), (+)-2-bornanone (6.45 %), eucalyptol (4.61 %), and 22 compounds including endo-borneol (22.76%), (+)-2-bornanone (8.08%), caryophyllene oxide (7.77%), citral (14.65%), cis-verbenol (4.43%), and eucalyptol (4.72%) as the major components were identified and isolated in the shoots and roots, respectively. To evaluate the allelopathic effect of A. psilostachya on bean and peanut seedlings, the aqueous extracts were prepared at four concentrations (25%, 50%, 75%, and 100%). The extracts at the concentrations of 50% or higher had a significant inhibitory effect on yield, dry weight, height, and LAI in both species. The inhibitory activity of A. psilostachya may be attributed to its high content of isoaromadendrene epoxide, citral, caryophyllene, and caryophyllene oxide. This study highlights that the allelopathy effects of A. psilostachya are due to the action of its compounds, which should be analyzed in future studies, and an accurate evaluation of the allelopathy effects of this invasive plant requires comprehensive, long-term studies in the environment.

RevDate: 2025-11-14
CmpDate: 2025-11-14

Shine R, Ward-Fear G, Jolly CJ, et al (2025)

Arid habitats intensify sexual conflict in invasive cane toads (Rhinella marina).

Royal Society open science, 12(11):251341.

Amplexus by male cane toads (Rhinella marina) impairs a female's mobility and may impose a risk of drowning. Near the arid-zone edge of the toads' Australian invasion, artificial ponds provide the only permanent open water. Cane toads must access water to hydrate every few nights, creating a potential for sexual conflict. Our field-based experiments show that a female toad that approaches one of these steep-sided dams encounters numerous reproductively active males, most of which are facing the shore. When amplexed by these males, she may find herself in deep water even close to the shore and is vulnerable to drowning. In trials with tethered females, toads amplexed in deep water could not hold their heads above the water's surface. Demographic effects of this sexual conflict are evident from population surveys: toad populations around dams are strongly male-biased whereas females are concentrated at mesic refuges around buildings that provide less dangerous conditions. Even around the same dam, female toads are often found on land whereas most males are found in the water. If sexual conflict around scarce waterbodies is lethal for female toads, we might reduce recruitment by allowing dense populations of male toads to persist.

RevDate: 2025-11-14
CmpDate: 2025-11-14

Norman PD, Garba A, Obellianne C, et al (2025)

Co-feeding transmission of Heartland virus between the North American tick, Amblyomma americanum (Acari: Ixodidae), and the invasive East Asian tick, Haemaphysalis longicornis (Acari: Ixodidae).

Journal of medical entomology, 62(6):1530-1539.

Haemaphysalis longicornis Neumann is an invasive tick species from East Asia with a rapidly expanding geographic range in the United States. In a laboratory setting, H. longicornis has been shown to support transovarial transmission of Heartland virus (HRTV; genus Bandavirus), an emerging tick-borne pathogen responsible for human disease in the southern and midwestern United States. The native Amblyomma americanum (L.) is the primary known vector of HRTV, and field surveillance studies have documented co-feeding of H. longicornis and A. americanum on shared hosts, raising questions about the potential for interspecies viral transmission. To investigate whether H. longicornis can acquire HRTV through co-feeding with infected A. americanum, we used a mouse model in which HRTV-infected A. americanum nymphs were co-fed with uninfected H. longicornis larvae or nymphs and screened recipient ticks using q-RT-PCR. HRTV RNA was detected in H. longicornis collected from multiple mice, demonstrating interspecies co-feeding transmission of HRTV. Mouse blood samples were consistently negative for HRTV RNA, while some skin biopsies from tick feeding sites were positive for the virus, indicating nonviremic co-feeding transmission. These findings provide the first experimental evidence that H. longicornis can acquire HRTV RNA through co-feeding with A. americanum and could contribute to its maintenance in nature, even in the absence of a known vertebrate reservoir host for HRTV.

RevDate: 2025-11-13

Kim K, Kachiprath B, Yeo IC, et al (2025)

Environmental DNA-based RPA-CRISPR/Cas12a assay for on-site detection of chironomid larvae in aquatic environments.

Pest management science [Epub ahead of print].

BACKGROUND: Freshwater chironomid midges pose a significant threat to drinking water quality and freshwater ecosystems in South Korea by disrupting ecological balance and causing biofouling in drinking water treatment systems. To enable rapid detection and provide early warnings of chironomid presence, we developed a highly sensitive and accurate diagnostic assay based on environmental DNA (eDNA) analysis. This method integrates recombinase polymerase amplification (RPA), CRISPR/Cas12a-mediated cleavage, and visualization through either fluorescence-based detection or a lateral flow assay (LFA).

RESULTS: The RPA-CRISPR/Cas12a assays demonstrated remarkable specificity for chironomid eDNA, as confirmed through field surveys and microscopic observations. Although both fluorescence-based and LFA-based RPA-CRISPR/Cas12a assays exhibited comparable detection limits of 10 copies/μL, the LFA method proved more convenient for on-site applications due to its ease of deployment in the field.

CONCLUSION: Our eDNA-based RPA-CRISPR/Cas12a assay addresses the limitations of traditional biomonitoring by requiring only a small sampling volume, thereby minimizing habitat disturbance, while offering much higher sensitivity. This assay represents a valuable tool for on-site detection of invasive species and for monitoring environmental and public health threats (e.g., chironomids). © 2025 The Author(s). Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.

RevDate: 2025-11-13
CmpDate: 2025-11-13

Wang H, Wu Q, Li S, et al (2025)

Environmental DNA Based Assessment of Fish Diversity in the Yarlung Zangbo River, Tibetan Plateau.

Ecology and evolution, 15(11):e72496.

Biodiversity is under unprecedented threat globally, with ecosystems vulnerable to climate change and detrimental anthropogenic impacts. Accurate assessments of biodiversity are essential to the development of effective conservation strategies. We investigated the fish diversity of the Yarlung Zangbo River of the Tibetan Plateau using environmental DNA (eDNA) technology. Water samples collected from 18 sampling sites revealed 18 fish species, including six unique to Tibet and one on China's list of State Key Protected Wild Animals, Oxygymnocypris stewartii. Schizopygopsis younghusbandi is widely distributed, with stable populations in all sampling sites. Non-metric multidimensional scaling analyses showed fish community composition to vary with elevation, although the data did not reach significance. Spearman correlation analyses revealed significant associations of fish species with environmental factors including flow velocity, water temperature, conductivity, and total dissolved solids. Eight exotic fish species were detected, highlighting the potential threat posed by non-native species to the river fish diversity. This study confirms the efficacy of eDNA technology in assessing aquatic biodiversity and its broad applicability as a versatile tool for fish conservation and management, across diverse aquatic ecosystems. In contrast to traditional methods, eDNA offers a non-invasive, simpler, and more efficient approach for detecting a broad range of species, including those that are rare or difficult to capture. The findings emphasize the need for future research to integrate traditional survey methods and eDNA technology to comprehensively assess ecosystem biodiversity and develop targeted conservation strategies.

RevDate: 2025-11-13

Liu KK, Eyer PA, Helms AM, et al (2025)

Colony and population genetic structure of the newly invasive white-footed ant (Technomyrmex difficilis) in the United States.

Insect science [Epub ahead of print].

The invasive white-footed ant Technomyrmex difficilis has emerged as a rising pest in several regions, yet its invasion dynamics remain underexplored. This species outcompetes native ants and causes agricultural losses by tending pest insects, including aphids and mealybugs. This study provides the first integrated analysis of the species' behavioral, chemical, and genetic variation across Texas and Florida populations. Observations suggest that the recently discovered Texas population of white-footed ants originated from Florida. Microsatellite and mitochondrial DNA analyses revealed low genetic diversity in both populations, with a shared haplotype consistent with the Texas population originating from Florida. STRUCTURE analysis further supported genetic clustering between the two regions. Despite similar within-colony coefficients of relatedness for workers, the populations differed in reproductive strategy: Florida colonies showed signs of inbreeding and high inter-colony aggression, whereas Texas colonies exhibited potential localized outbreeding, low aggression, and more uniform cuticular hydrocarbon profiles. Aggression was positively correlated with chemical divergence but not with genetic differentiation. This study establishes a foundational understanding and highlights the importance of integrating multiple types of data to understand the invasion biology of Technomyrmex difficilis.

RevDate: 2025-11-13
CmpDate: 2025-11-13

Chen H, Zhou J, Wu W, et al (2025)

EyeInvaS: Lowering Barriers to Public Participation in Invasive Alien Species Monitoring Through Deep Learning.

Animals : an open access journal from MDPI, 15(21):.

Invasive alien species (IASs) pose escalating threats to global ecosystems, biodiversity, and human well-being. Public participation in IAS monitoring is often limited by taxonomic expertise gaps. To address this, we established a multi-taxa image dataset covering 54 key IAS in China, benchmarked nine deep learning models, and quantified impacts of varying scenarios and target scales. EfficientNetV2 achieved superior accuracy, with F1-scores of 83.66% (original dataset) and 93.32% (hybrid dataset). Recognition accuracy peaked when targets occupied 60% of the frame against simple backgrounds. Leveraging these findings, we developed EyeInvaS, an AI-powered system integrating image acquisition, recognition, geotagging, and data sharing to democratize IAS surveillance. Crucially, in a large-scale public deployment in Huai'an, China, 1683 user submissions via EyeInvaS enabled mapping of Solidago canadensis, revealing strong associations with riverbanks and roads. Our results validate the feasibility of deep learning in empowering citizens in IAS surveillance and biodiversity governance.

RevDate: 2025-11-13
CmpDate: 2025-11-13

Di Gristina E, Pardi R, Cirlincione F, et al (2025)

Ornamental Vascular Plant Diversity in Basilicata (Southern Italy).

Plants (Basel, Switzerland), 14(21):.

This investigation focuses on urban ornamental greenery, a field of research that is still relatively unexplored in Italy but is becoming increasingly important both from a botanical point of view and in relation to sustainable land management and planning. A checklist of the ornamental vascular flora of Basilicata (Southern Italy) is reported here. A total of 281 taxa were recorded, including trees, shrubs, herbaceous plants, and succulents cultivated in parks, gardens, and street trees. Such taxa (including 265 species s. str., 6 varieties, 5 subspecies, and 11 forms) belong to 201 genera, included in 94 families, among which the most represented are Rosaceae, Oleaceae, Asteraceae, Pinaceae, Cupressaceae, and Fabaceae. Phanerophytes represent the dominant growth form, and the chorological spectrum is composed mainly of Asian and American taxa. Taxa from subtropical and tropical biomes also showed a significant presence. This study highlighted the clear prevalence in the Basilicata ornamental flora of alien taxa (approximately 80%, of which 21% are naturalized aliens) compared to native ones, which is a phenomenon that is unfortunately widespread and observed worldwide.

RevDate: 2025-11-13
CmpDate: 2025-11-13

Afonso I, Lobo-Arteaga J, Kakkonen JE, et al (2026)

Optimizing sampling design for monitoring non-indigenous species in coastal recreational marinas: Insights from the Tagus estuary case study.

Marine pollution bulletin, 222(Pt 1):118607.

The absence of effective monitoring and management measures will lead to a larger impact of Non-Indigenous Species (NIS). To develop appropriate monitoring programs to assess NIS spatial and temporal trends it is crucial to understand the influence of different local scale factors for their establishment and detection. This study aims to identify the best sampling design for monitoring NIS and detecting new introductions in transitional areas using the Tagus estuary (Portugal) as a case study by comparing results obtained i) in four different marinas located along an estuarine gradient, ii) collected in two different years (2016 and 2022), iii) using different sampling methods (scraping and Rapid Assessment Survey - RAS and iv) using a different number of replicates (24 and 4). Results showed an increase in NIS number and abundance from 2016 to 2021, but seasonal effects cannot be excluded. Although the marina size, used as proxy of the propagule pressure, influenced NIS richness and abundance, the location of these marinas in the estuarine gradient seems to have the highest influence on invasiveness levels. The results based on different sampling efforts indicate that the minimum number of replicates required will depend on the goal but four replicate samples collected by scrapping in different areas of the estuarine gradient seem to be a balanced sampling effort to detect NIS trends in 6 years evaluation periods, as required by the Marine Strategy Framework Directive (MSFD).

RevDate: 2025-11-13
CmpDate: 2025-11-13

Adhikari A, Lane B, Harmon PF, et al (2025)

Bipolaris species associated with foliar diseases on invasive and weedy grasses in Florida.

Mycologia, 117(6):1067-1076.

Invasive and weedy plants proliferate in disturbed areas, including the margins of agricultural fields where they can be alternative hosts and reservoirs of crop pathogens. Research on plant pathogens focuses on economically important plants, whereas pathogens of weedy and invasive grasses are generally less well characterized. Bipolaris species have the potential to cause disease on many plant species and are common pathogens of grasses and crops in the family Poaceae. This study aimed to identify Bipolaris species causing foliar lesions on common weedy and invasive grasses in disturbed and natural areas in four counties in Florida. Isolation of characteristic Bipolaris conidia from sampled grasses resulted in 22 isolates. Maximum likelihood phylogenetic analysis of internal transcribed spacer (ITS) and glyceraldehyde-3-phosphate dehydrogenase (GPDH) gene sequences from these isolates identified four Bipolaris and one Curvularia species. B. yamadae was the most common species recovered, followed by B. sorokiniana, B. cynodontis, and B. zeae. To determine whether the Bipolaris isolates were potential crop pathogens, we tested their pathogenicity on seedlings of wheat cultivar "Jamestown." All Bipolaris isolates tested caused moderate to severe disease. Our results indicate that invasive and weedy grasses support populations of Bipolaris pathogens of crops. Knowledge of pathogen natural history can inform management of existing and emerging crop diseases.

RevDate: 2025-11-13
CmpDate: 2025-11-13

Liesenfelt T, Markee A, Demard EP, et al (2025)

Genome report: genome sequence of the hibiscus mealybug, Nipaecoccus viridis (Newstead), an invasive pest of citrus.

G3 (Bethesda, Md.), 15(11):.

Mealybugs are frequently known for being pest insects to both ornamental and large-scale agricultural crops. Yet despite their agricultural importance, the genomic resources for this group remain quite limited. One such species is the hibiscus mealybug, Nipaecoccus viridis (Newstead) (Hemiptera: Coccomorpha: Pseudococcidae). This invasive mealybug species has recently expanded throughout Florida and has spread across the state. Genomic resources would provide a new means to better understand the invasive nature of this insect, and thus, we present the de novo genome assembly for N. viridis. Our genome assembly is 289 Mb, in which 91.2% of this sequence assembled into 5 chromosomal scaffolds. We report 15,370 genes to be present within our genome. We found that repetitive elements in the genome accounted for 32.40% of the sequence. These statistics follow similar trends to other previously sequenced Pseudococcidae species.

RevDate: 2025-11-12

Shaltout SK, Hatab EE, El-Khalafy MM, et al (2025)

Assessment taxonomy and pathways of alien plant species in Egyptian protected areas.

Scientific reports, 15(1):39577.

Invasive species are a real threat to biodiversity worldwide, and Egypt is no exception for that threat. In Egypt, there is thirty protected areas, representing most of the ecological important areas in Egypt, is declared and managed by the Nature Conservation Sector Agency, Egypt, with an approximate area of 142,664 km[2] (representing 14.3 % of Egypt's country area). Until 2012, the declared protectorates include the following four groups: 7 marines, 7 wetlands, 10 deserts and 6 geological protectorates. The goals of the present study were: 1) creating an inventory of alien species in the Egyptian protected areas, 2) assessing the protection effect on the spread of invasive species in different protected areas, and 3) assessing the pathway of alien species into the protected areas and how to control them. This study was conducted by reviewing current and available literature, field trips, and herbaria consultation. Our results indicated that Lake Burullus has the highest number of alien species (27= 13.7%), while Abu-Galum has the lowest (2= 1.2%). On the other hand, some protected areas (e.g. Nabq, Wadi Degla, White Desert, El-Gilf El-Kebir) have no alien species. This indicates that some protected areas are experiencing high levels of protection, and their locations are less affected by human activities. Three non-native invasive species (Azolla filiculoides, Bassia indica, and Eichhornia crassipes) are threating the ecosystem of Ashtum El-Gamil, Wadi El-Rayan and Lake Burullus Qaroun. On the other hand, however, Ziziphus spina-christi was recorded in seven protected areas as sand controllers and has medicinal and grazing benefits. Among the three different categories of the alien species, the naturalized species group has the highes According to the national strategy for biodiversity in Egypt - For a sustainable Future 2030 (CBD 2020) this study provides a comprehensive assessment of alien species dynamics in the ecosystem of Egyptian protected area.

RevDate: 2025-11-12

Foley J, Rubino F, Kam D, et al (2025)

Assessing the potential risk of lone star tick, Amblyomma americanum, establishment in California.

Ticks and tick-borne diseases, 16(6):102566 pii:S1877-959X(25)00130-X [Epub ahead of print].

The lone star tick (LST), Amblyomma americanum, is an aggressive human biter and important vector of the causative agents of tick-borne diseases. As geographic ranges of multiple Amblyomma species rapidly expand due to habitat changes and human and other animal movement patterns, there are concerns for establishment of LST in US states with suitable climates, such as California, especially given a dearth in gaps in tick surveillance. Importantly, previous niche modeling confirmed habitat in California along the length of the coast and coast range mountains. We sought data on LSTs and LST risk from 30 different entities including companies that identify and test ticks, natural history and entomology museums and collections, experts, and large databases. These queries and published records yielded records of 76 LSTs from California as well as two Amblyomma cajennense sensu lato, one Amblyomma sabanerae, one Amblyomma maculatum, and five Amblyomma dissimile. Among LSTs, there were 18 adult females, ten males, 13 adults for which sex was not recorded, 22 nymphs, two larvae, and 11 with no stage data. LSTs were recorded only during late spring through late summer, with all three feeding stages superimposed temporally. Active surveillance was conducted at nine sites considered high-risk due to earlier records of LSTs or high probability of establishment on niche modeling, using tick flagging, monitoring ovine and cervid hosts, and circulating a flier; no LSTs were recovered in this activity. We assessed risk for establishment of LSTs in California using invasion theory, prior niche modeling, literature review of ecological constraints on LSTs within their current range, data acquired in retrospective and prospective segments of this study, and expert consultation. Elevated risk is expected particularly along coastal California. Although some of these ticks likely were transported from out of state endemic regions, the findings of 76 LSTs, including all three feeding stages, in multiple counties raises concern that establishment in the future could occur in California.

RevDate: 2025-11-12

You K, Liu E, D Cheng (2025)

Health assessment of river ecosystem in the lower Jinsha River Basin using an improved comprehensive fuzzy evaluation method.

Environmental monitoring and assessment, 197(12):1330.

To comprehensively evaluate the ecosystem health of eight major tributaries in the lower Jinsha River, an evaluation framework was established, incorporating five sub-criteria-morphological structural integrity, hydrological integrity, chemical integrity, biological integrity, and regional service sustainability-encompassing 16 indicators. A multilevel fuzzy comprehensive evaluation, integrating the Analytic Hierarchy Process (AHP), the entropy weight method, and the maximum membership principle, was employed in the Yibin section of the lower Jinsha River. This approach accommodates the inherent fuzziness and uncertainty in indicator classification, thereby avoiding biases introduced by rigid classification thresholds. The basin's overall health was classified as healthy, with a mean River Health Index of 80.73 (SD = 2.91). However, significant spatiotemporal heterogeneity was observed: morphological structural integrity scored relatively low (mean = 69.98, SD = 9.27), whereas chemical integrity was notably high (mean = 91.50, SD = 5.32). Uncertainty analysis supported the robustness of the overall assessment (95% CI: 78.28-83.18), though considerable variability was detected among certain sub-criteria, reflecting spatial disparities in anthropogenic pressures and biodiversity. Further analysis identified impaired river connectivity, agricultural non-point source pollution, and invasive species as the principal drivers of ecosystem health. In response, the following management strategies are proposed: implementation of sewage diversion and interception projects to mitigate point and non-point source pollution, development of a dynamic water-quality monitoring and early-warning system, and application of bioremediation technologies to enhance channel self-purification capacity and ecological functioning.

RevDate: 2025-11-12

Aktar MS, Yue Y, Bani-Yaghoub M, et al (2025)

Understanding the impacts of extreme weather on biological control through traveling wave analysis of a prey-predator model.

Scientific reports, 15(1):39606.

This study investigates the effects of extreme weather events on the efficacy of biological control of invasive species using a prey-predator reaction-diffusion model with the Allee effect. The model incorporates weather and environmental factors that affect species mortality, growth, and interaction rates. We first derive exact traveling wave solutions of the reduced model using the generalized exponential rational function method. The stability of the wave solutions is then numerically confirmed by demonstrating that the model solutions, perturbed by various levels of noise in the initial condition, converge to the traveling wave solutions. This suggests that extreme weather events that only impact the initial population sizes have only transient effects and do not change the fate of the species. Nevertheless, asymptotic analysis of the full model reveals conditions for the existence of bistable traveling wave solutions. This implies that extreme weather events may lead to predator extinction and the subsequent establishment of prey in a spatial domain. Hence, extreme weather events may lead to failure of biological control efforts and the persistence of invasive species. In addition, we establish conditions under which extreme weather events drive both prey and predator populations to extinction, which would be an ideal outcome for biological control of invasive species. This study highlights the importance of refining widely accepted ecological models to enhance the forecasting of ecological outcomes under extreme weather events.

RevDate: 2025-11-12

Hlina BL, Robinson RL, Bloomfield EJ, et al (2025)

Monthly differences in the movement ecology of lake whitefish (Coregonus clupeaformis) in eastern Lake Ontario.

Journal of fish biology [Epub ahead of print].

Lake whitefish are a cold-water species that holds cultural and economic importance throughout the Great Lakes region. Anthropogenic stressors over the last 60 years (e.g., invasive species, habitat degradation, and pollution) have caused significant declines in their populations. Furthermore, there is limited knowledge on the spatial ecology and habitat use of the species in Lake Ontario. Therefore, we used acoustic telemetry to quantify horizontal and vertical habitat use by lake whitefish over a 3-year period (2021-2024) in Lake Ontario. We also evaluated seasonal changes in bottom-oriented versus suspended behaviours. Lake whitefish were heavily concentrated along the central Duck-Galloo Ridge and in 20-30 m during periods of stratification (June to September), while their distribution shifted to the south shore of Prince Edward County and 10-25 m during isothermal conditions (non-stratified; October to May) and for spawning. During the isothermal period, lake whitefish exhibited a predominantly bottom-oriented behaviour; during stratification, they exhibited both suspended and bottom-oriented behaviours. These differences in vertical and horizontal distribution may be driven by changes in thermal habitats and/or prey; however, further exploration is needed. Ongoing ecological change may influence lake whitefish distribution and behaviours, necessitating changes to monitoring and/or management that accounts for observed behaviours.

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ESP Origins

In the early 1990's, Robert Robbins was a faculty member at Johns Hopkins, where he directed the informatics core of GDB — the human gene-mapping database of the international human genome project. To share papers with colleagues around the world, he set up a small paper-sharing section on his personal web page. This small project evolved into The Electronic Scholarly Publishing Project.

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In 1995, Robbins became the VP/IT of the Fred Hutchinson Cancer Research Center in Seattle, WA. Soon after arriving in Seattle, Robbins secured funding, through the ELSI component of the US Human Genome Project, to create the original ESP.ORG web site, with the formal goal of providing free, world-wide access to the literature of classical genetics.

ESP Rationale

Although the methods of molecular biology can seem almost magical to the uninitiated, the original techniques of classical genetics are readily appreciated by one and all: cross individuals that differ in some inherited trait, collect all of the progeny, score their attributes, and propose mechanisms to explain the patterns of inheritance observed.

ESP Goal

In reading the early works of classical genetics, one is drawn, almost inexorably, into ever more complex models, until molecular explanations begin to seem both necessary and natural. At that point, the tools for understanding genome research are at hand. Assisting readers reach this point was the original goal of The Electronic Scholarly Publishing Project.

ESP Usage

Usage of the site grew rapidly and has remained high. Faculty began to use the site for their assigned readings. Other on-line publishers, ranging from The New York Times to Nature referenced ESP materials in their own publications. Nobel laureates (e.g., Joshua Lederberg) regularly used the site and even wrote to suggest changes and improvements.

ESP Content

When the site began, no journals were making their early content available in digital format. As a result, ESP was obliged to digitize classic literature before it could be made available. For many important papers — such as Mendel's original paper or the first genetic map — ESP had to produce entirely new typeset versions of the works, if they were to be available in a high-quality format.

ESP Help

Early support from the DOE component of the Human Genome Project was critically important for getting the ESP project on a firm foundation. Since that funding ended (nearly 20 years ago), the project has been operated as a purely volunteer effort. Anyone wishing to assist in these efforts should send an email to Robbins.

ESP Plans

With the development of methods for adding typeset side notes to PDF files, the ESP project now plans to add annotated versions of some classical papers to its holdings. We also plan to add new reference and pedagogical material. We have already started providing regularly updated, comprehensive bibliographies to the ESP.ORG site.

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This is a must read book for anyone with an interest in invasion biology. The full title of the book lays out the author's premise — The New Wild: Why Invasive Species Will Be Nature's Salvation. Not only is species movement not bad for ecosystems, it is the way that ecosystems respond to perturbation — it is the way ecosystems heal. Even if you are one of those who is absolutely convinced that invasive species are actually "a blight, pollution, an epidemic, or a cancer on nature", you should read this book to clarify your own thinking. True scientific understanding never comes from just interacting with those with whom you already agree. R. Robbins

Electronic Scholarly Publishing
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E-mail: RJR8222 @ gmail.com

Papers in Classical Genetics

The ESP began as an effort to share a handful of key papers from the early days of classical genetics. Now the collection has grown to include hundreds of papers, in full-text format.

Digital Books

Along with papers on classical genetics, ESP offers a collection of full-text digital books, including many works by Darwin and even a collection of poetry — Chicago Poems by Carl Sandburg.

Timelines

ESP now offers a large collection of user-selected side-by-side timelines (e.g., all science vs. all other categories, or arts and culture vs. world history), designed to provide a comparative context for appreciating world events.

Biographies

Biographical information about many key scientists (e.g., Walter Sutton).

Selected Bibliographies

Bibliographies on several topics of potential interest to the ESP community are automatically maintained and generated on the ESP site.

ESP Picks from Around the Web (updated 28 JUL 2024 )