Long-term trends in stream benthic macroinvertebrate communities are driven by chemicals

Environmental Sciences Europe, Journal Year: 2023, Volume and Issue: 35(1)

Published: Dec. 6, 2023

Abstract Background Recent studies indicate a partial recovery of European stream macroinvertebrate diversity. However, the key determinants shaping overall community trends are only partly explored, owing to insufficient long-term environmental data collected in parallel with responses. We investigate communities (i.e., taxonomic and trait composition metrics), explore their relationships diverse drivers land-use, runoff, water temperature, in-stream chemicals). use annually spring summer between 2007 2021 at four sampling sites within Rhine-Main-Observatory Long-Term Ecological Research site. These encompass gradient from less-disturbed disturbed conditions. Results Over time, shifts metrics indicated an improvement Long-term biological mirrored those for metrics; example, increases over time richness were paralleled by functional dispersion. Meanwhile, ecological particularly driven changes drivers. Land-use, runoff explained around 20% variance communities. Water temperature land-use played relatively equal roles metric responses spring, while emerged as most influential driver summer. when incorporating chemical more direct measurement increased c.a. 50% both seasons. Conclusions Examining relevant variables beyond climate improves insights into why biodiversity exhibits trends. call increase initiatives link monitoring

Language: Английский

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Climate change-related biodiversity fluctuations and composition changes in an old-growth subtropical forest: A 26-yr study

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 914, P. 169899 - 169899

Published: Jan. 5, 2024

Language: Английский

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Habitat Diversity Mitigates the Impacts of Human Pressure on Stream Biodiversity

Global Change Biology, Journal Year: 2024, Volume and Issue: 30(10)

Published: Oct. 1, 2024

ABSTRACT Recent decades have witnessed substantial changes in freshwater biodiversity worldwide. Although research has shown that can be shaped by habitat diversity and human‐induced pressure, the potentials for interaction between these drivers at large spatial extents remain unclear. To address issues, we employed a spatially extensive multitrophic fish insect database from 3323 stream sites across United States, to investigate ability of modulate effect human pressure on richness abundance insects. We found evidence high levels were associated with increased insects (including whole‐assemblage individual trophic guilds). also show effects tend become positive diversity. Where is low, strongly reduces abundance, whereas reductions are attenuated Structural equation modeling revealed reduced diversity, indirectly negatively affecting These findings illustrate that, addition promoting greater biodiversity, may mitigate deleterious pressures two assemblages. Overall, our study suggests maintaining useful way protect ongoing increases pressure. However, if continue increase, this will reduce further threatening

Language: Английский

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Temporal niche dynamics of spreading native invertebrates underlie doubling of richness in pristine temperate streams

Journal of Animal Ecology, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 17, 2025

Abstract While biodiversity loss is undeniably a global phenomenon, an increase in taxonomic richness has recently been reported from some ecosystems and spatial scales. A striking abundance and/or species documented temperate rivers over the last 25 years, with many of expanding (i.e. winners) being native species. However, lack repeatedly collected local environmental data prevents exploration their niche dynamics also makes it difficult to distinguish between possible causes. We fill this gap by using occurrence 65 pristine Czech sampled 1997–2000 2015. The same methods were used for sampling macroinvertebrates measuring parameters both periods. selected 43 winners, defined as taxonomically validated originally non‐rare macroinvertebrate whose occupancy increased at least six sites time searched consistent patterns stability, expansion restriction) among that might contribute most overall richness. Using several biological traits, we compared winners other 253 taxa look differences. Analysis showed stability was far predominant pattern dynamics. This clearly indicates original niches, limited contribution shift or expansion, depending on As no significant differences either temperature preferences traits found taxa, there unique set functional explain success winners. observed mechanism filling space spreading not only explains richness, but contributes support hypothesis climate‐driven ecosystem energy flow new perspective. metabolism system may relax interspecific competition allowing carry more individuals species, even without need nutrients recovery.

Language: Английский

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Bias in neotropical and reef biodiversity monitoring programs may prevent detecting changes in species diversity through time

Biological Conservation, Journal Year: 2025, Volume and Issue: 303, P. 111031 - 111031

Published: Feb. 17, 2025

Language: Английский

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Temporal dynamics of biodiversity in benthic macroinvertebrate communities from a 140-year sedimentary DNA record and their driving mechanisms

Ecological Informatics, Journal Year: 2025, Volume and Issue: unknown, P. 103119 - 103119

Published: March 1, 2025

Language: Английский

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Integrating the Bright and Dark Sides of Aquatic Resource Subsidies—A Synthesis

Ecology Letters, Journal Year: 2025, Volume and Issue: 28(4)

Published: April 1, 2025

ABSTRACT Aquatic and terrestrial ecosystems are linked through the reciprocal exchange of materials organisms. Aquatic‐to‐terrestrial subsidies relatively small in most ecosystems, but they can provide high contents limiting resources that increase consumer fitness ecosystem production. However, also may carry significant contaminant loads, particularly anthropogenically impacted watersheds. Global change processes, including land use change, climate biodiversity declines, altering quantity quality aquatic subsidies, potentially shifting balance costs benefits for consumers. Many global processes interact impact both bright dark sides simultaneously, highlighting need future integrative research bridges as well disciplinary boundaries. We identify key priorities, increased quantification spatiotemporal variability across a range greater understanding landscape‐scale extent subsidy impacts deeper exploration relative

Language: Английский

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Legacy effects of four decades of insecticide applications on contemporary riverine benthic macroinvertebrates

Environmental Pollution, Journal Year: 2025, Volume and Issue: unknown, P. 126397 - 126397

Published: May 1, 2025

Language: Английский

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Shifting taxonomic and functional community composition of rivers under land use change

Ecology, Journal Year: 2023, Volume and Issue: 104(11)

Published: Aug. 23, 2023

Land use intensification has led to conspicuous changes in plant and animal communities across the world. Shifts trait-based functional composition have recently been hypothesized manifest at lower levels of environmental change when compared species-based taxonomic composition; however, little is known about commonalities these responses groups geographic regions. We investigated this hypothesis by testing for similarities riverine fish insect gradients land major hydrological regions conterminous United States. analyzed an extensive data set representing 556 species 33 trait modalities from 8023 1434 taxa 50 5197 aquatic communities. Our results demonstrate abrupt threshold both community due conversion. Functional consistently demonstrated (urban p = 0.069; agriculture 0.029) 0.095; 0.043) according gradient forest models. found significantly thresholds urban versus agricultural fishes (taxonomic < 0.001) insects 0.001; 0.033). further revealed that were more geographically consistent than change. Traits contributing most overall differed along conformed predicted ecological mechanisms underpinning This study points reliable early-warning accurately forecast compositional shifts conversion, highlight importance considering indicators inform large-scale management strategies policies.

Language: Английский

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Time series of freshwater macroinvertebrate abundances and site characteristics of European streams and rivers

Scientific Data, Journal Year: 2024, Volume and Issue: 11(1)

Published: June 7, 2024

Abstract Freshwater macroinvertebrates are a diverse group and play key ecological roles, including accelerating nutrient cycling, filtering water, controlling primary producers, providing food for predators. Their differences in tolerances short generation times manifest rapid community responses to change. Macroinvertebrate composition is an indicator of water quality. In Europe, efforts improve quality following environmental legislation, primarily starting the 1980s, may have driven recovery macroinvertebrate communities. Towards understanding temporal spatial variation these organisms, we compiled TREAM dataset (Time seRies European freshwAter Macroinvertebrates), consisting time series from 1,816 river stream sites (mean length 19.2 years 14.9 sampling years) 22 countries sampled between 1968 2020. total, data include >93 million individuals 2,648 taxa 959 genera 212 families. These can be used test questions ranging identifying drivers population dynamics specific assessing success legislative management restoration efforts.

Language: Английский

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