Eutrophication increases the similarity of cyanobacterial community features in lakes and reservoirs

Water Research, Journal Year: 2023, Volume and Issue: 250, P. 120977 - 120977

Published: Dec. 6, 2023

Language: Английский

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The global human impact on biodiversity

Nature, Journal Year: 2025, Volume and Issue: unknown

Published: March 26, 2025

Abstract Human activities drive a wide range of environmental pressures, including habitat change, pollution and climate resulting in unprecedented effects on biodiversity 1,2 . However, despite decades research, generalizations the dimensions extent human impacts remain ambiguous. Mixed views persist trajectory at local scale 3 even more so biotic homogenization across space 4,5 We compiled 2,133 publications covering 97,783 impacted reference sites, creating an unparallelled dataset 3,667 independent comparisons all main organismal groups, habitats five most predominant pressures 1,6 For comparisons, we quantified three key measures to assess how these shifts composition biological communities changes diversity, respectively. show that distinctly shift community decrease diversity terrestrial, freshwater marine ecosystems. Yet, contrary long-standing expectations, there is no clear general communities. Critically, direction magnitude vary organisms scales which they are studied. Our exhaustive global analysis reveals impact mediating factors can benchmark conservation strategies.

Language: Английский

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eDNA reveals spatial homogenization of fish diversity in a mountain river affected by a reservoir cascade

Journal of Environmental Management, Journal Year: 2024, Volume and Issue: 361, P. 121248 - 121248

Published: May 30, 2024

Language: Английский

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Urbanization drives biotic homogenization of the avian community in China

Integrative Zoology, Journal Year: 2024, Volume and Issue: unknown

Published: Feb. 20, 2024

Abstract Urbanization‐driven biotic homogenization has been recorded in various ecosystems on local and global scales; however, it is largely unexplored developing countries. Empirical studies different taxa bioregions show conflicting results (i.e. vs. differentiation); the extent to which community composition changes response anthropogenic disturbances factors governing this process, therefore, require elucidation. Here, we used a compiled database of 760 bird species China quantify multiple‐site β‐diversity fitted distance decay pairwise β‐diversities between natural urban assemblages assess whether urbanization had driven homogenization. We generalized dissimilarity models (GDM) elucidate roles spatial environmental avian dissimilarities before after urbanization. The among were markedly lower than those assemblages, decays similarities more rapid. These consistent taxonomic, phylogenetic, functional aspects, supporting general by GDM indicated that geographical temperature dominant predictors dissimilarity. However, contribution climatic decreased explaining compositional assemblages. Geographical distances accounted for much variations implying potential risk uncertainty model predictions under further climate change disturbances. Our study concludes dimensions urbanization‐driven China.

Language: Английский

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Extinction risk of European bryophytes predicted by bioclimate and traits

Biological Conservation, Journal Year: 2024, Volume and Issue: 293, P. 110584 - 110584

Published: April 18, 2024

Extinction risk is not randomly distributed among species but depends on traits, their relationship to climate and land use, corresponding threats by global change. While knowledge of which factors influence extinction increasingly available for some taxonomic groups, this still largely lacking bryophytes. Here, we used random forest models study biological ecological traits bioclimatic variables are important predictors in European We hypothesized that with a high have short life span, low dispersal capacities, more likely specialists than generalists terms bioclimate. Overall, found be the most risk, notably precipitation seasonality, related such as continentality elevational range. Important were plant size, strategy sporophyte production. In general, living at climatic extremes and/or those narrow environmental range threatened. addition, small-sized reproductive effort larger spore size Our findings imply change may become an driver bryophytes will relevant coping future threats.

Language: Английский

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Assembly Processes Underlying Biotic Homogenization of Soil Microbial Communities in an Urban Ecosystem

Land Degradation and Development, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 13, 2025

ABSTRACT Urbanization is known to cause biotic homogenization, but the processes controlling homogenization are not well understood. Here, we analyzed microbial communities from 258 soil samples covering large landscape heterogeneity of entire Shanghai megacity. We measured urbanization intensity by incorporating habitat fragmentation, connectivity, and distance city center. determined extent which bacterial fungal community composition varied with how different assembly contributed variations. found significantly positive effects on compositional bacteria fungi, proportions generalists specialists were related homogenization. Dispersal ecological drift explained at least 60% variations, increased influences dispersal reducing specialists. Environmental variables < 28% higher led a simplified co‐occurrence network an proportion in network. These results indicate that homogenized shifting generalist specialist microbes, weak environmental selection. Therefore, conserve urban biodiversity ecosystem functioning face complex human impacts, management strategies should consider only conditions also drift, as species preferences, increase effectiveness actions.

Language: Английский

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Biochar reduces plasmid-mediated antibiotic resistance gene transfer in earthworm ecological filters for rural sewage treatment

Journal of Hazardous Materials, Journal Year: 2025, Volume and Issue: 487, P. 137230 - 137230

Published: Jan. 15, 2025

Language: Английский

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Urbanization leads to convergent succession and homogenization of phytoplankton functional traits in a subtropical watershed over 11 years

Environmental Research, Journal Year: 2025, Volume and Issue: unknown, P. 121097 - 121097

Published: Feb. 1, 2025

Language: Английский

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Species that dominate spatial turnover can be of (almost) any abundance

Ecography, Journal Year: 2025, Volume and Issue: unknown

Published: March 4, 2025

An ongoing quest in ecology is understanding how species commonness influences compositional change. While each species' contribution to beta diversity (SCBD) depends both on its abundance and widespread it (e.g. occupancy) a general expectation for these lacking. Using published data 9924 across 177 metacommunities, we modelled relative SCBD as function of occupancy using correlative mechanistic regression models (the latter derived from population demographic theory). Although the model provided superior fit data, results suggest with infrequent combinations (high mid‐high that make dominant diversity. The nature their interaction most apparent when depicted abundance–occupancy sample space, which shows probability making concave‐up abundance. Species found an intermediate number sites (0.56) required smallest share total (0.05) top‐decile contribution. Simulations varying evenness conspecific spatial patterns support main findings show variations strength aggregation predominantly result observed relationship between space illustrates empirical abundance‐SCBD relationships can be linear or unimodal provides framework understand global change processes. To preserve turnover, should prioritized.

Language: Английский

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Disentangling nonrandom structure from random placement when estimating β‐diversity through space or time

Ecosphere, Journal Year: 2025, Volume and Issue: 16(3)

Published: March 1, 2025

Abstract There is considerable interest in understanding patterns of β‐diversity that measure the amount change species composition through space or time. Most hypotheses for evoke nonrandom processes generate spatial and temporal within‐species aggregation; however, can also be driven by random sampling processes. Here, we describe a framework based on rarefaction curves quantifies contribution compositional differences across samples to β‐diversity. We isolate effect aggregation beta‐diversity using coverage standardized metric (β C ). demonstrate utility our simulations an empirical case study examining variation avian time engineered versus natural riparian areas. The primary strengths approach are it provides intuitive visual null model expected biodiversity under allows integrating analyses α‐, γ‐, β‐scales. Importantly, method accommodate comparisons between communities with different pool sizes, used examine turnover both within meta‐communities.

Language: Английский

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