Environmental DNA metabarcoding reveals the impacts of anthropogenic pollution on multitrophic aquatic communities across an urban river of western China

Environmental Research, Journal Year: 2022, Volume and Issue: 216, P. 114512 - 114512

Published: Oct. 5, 2022

Language: Английский

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Stream macroinvertebrate communities in restored and impacted catchments respond differently to climate, land-use, and runoff over a decade

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 929, P. 172659 - 172659

Published: April 22, 2024

Identifying which environmental drivers underlie degradation and improvements of ecological communities is a fundamental goal ecology. Achieving this challenge due to diverse trends in both conditions across regions, it constrained by the lack long-term parallel monitoring community data needed study causal relationships. Here, we identify key using high-resolution - dataset, an ensemble Soil Water Assessment Tool (SWAT+) model, models investigate effects climate, land-use, runoff on decadal trend (2012-2021) stream macroinvertebrate restored urban catchment impacted with mixed land-uses Germany. The showed decreased precipitation, increased temperature, reduced anthropogenic land-uses, led opposing catchment. two catchments also varied taxonomic trait composition metrics. most significant over time were recorded sites, have become wastewater free since 2007 2009. Within metric primarily explained land-use evaporation trends, while mostly associated precipitation trends. Meanwhile, did not undergo changes between 2012 2021, likely influenced prolonged droughts following floods after 2018. results our confirm significance restoration management fostering communities, climate change remains prodigious threat. coupling biodiversity concurrent sampling relevant critical for preventative restorative

Language: Английский

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The role of river connectivity in the distribution of fish in an anthropized watershed

The Science of The Total Environment, Journal Year: 2025, Volume and Issue: 959, P. 178204 - 178204

Published: Jan. 1, 2025

The ongoing biodiversity crisis is especially severe in freshwater habitats. Anthropized watersheds, such as the Seine-Normandie basin France, are particularly affected by human interference. study of fish species distribution watersheds often relies on environmental drivers land use or climate. Yet, also exposed to river connectivity constraints, dams, that understudied despite their potential impact dispersal. For this study, we investigated role local and whole-basin longitudinal distribution. We designed indices based network characteristics specific mobility for 33 included these models, taking into account habitat suitability, quantify Keeping best index each species, an average 29 % - up 57 explained distribution, depending was tied connectivity. found high had a significant positive linear effect presence probability. Using scoring system across multiple indices, took context (e.g. ecological zonation river) performed consistently better than others. Indices only dispersal limitation scored higher 12 while barriers, alone, were most important constraint 10 remaining 11 being associated with both. This work points fragmentation cause lower likelihood many non-diadromous species. It highlights importance considering both physical functional constraints provides additional insights management restoration.

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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Algal or bacterial community: Who can be an effective indicator of the impact of reclaimed water recharge in an urban river

Water Research, Journal Year: 2023, Volume and Issue: 247, P. 120821 - 120821

Published: Nov. 1, 2023

Language: Английский

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The Biology and Ecology of Streams and Rivers

Oxford University Press eBooks, Journal Year: 2023, Volume and Issue: unknown

Published: May 30, 2023

Abstract A major textbook on running waters, promoting understanding of the nature rivers as ecosystems, and detailing biodiversity natural history their biota. The book takes a primarily biological approach to river ecology, dealing with scientific questions about but referring throughout possible applications approaches management. notion habitat templet refers suite environmental factors that face lotic organisms adaptations traits enable survival in such challenging environments. How does complex, patchy whole-river networks impinge population dynamics communities? Species interactions food web linkages determine flow energy material through communities lead ecosystem processes metabolism (the balance primary production community respiration) ecology nutrients. stresses systems ‘open’ exchanging materials land downstream systems. can be sustainable part capital which we all depend? In final chapter forward-looking view is progressively devoted applied questions. Biology Ecology Streams Rivers seeks provide knowledge necessary for their, our, future. We need appreciate ‘what do us’ reverse deterioration waters an increasingly thirsty, hungry changing world.

Language: Английский

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The biological condition of French rivers has not improved over the last seventeen years according to the national Fish-Based-Index (FBI)

Knowledge and Management of Aquatic Ecosystems, Journal Year: 2024, Volume and Issue: 425, P. 11 - 11

Published: Jan. 1, 2024

We evaluate, for the first time, variations of national Fish-Based-Index (FBI) over a seventeen-year period 1583 sampled sites evenly distributed across French territory. As far as we know this is one studies analyzing temporal trends fish-based biotic indicator such consistent set records going back almost two decades. Our results provide four important insights. First, index efficient in discriminating good condition from experiencing anthropogenic disturbances. Second, according to index, ecological state riverine fish assemblages rather poor, around half assessed sites, thought reflect diverse conditions within system, are significantly impaired. Third, there no noticeable amelioration through time assemblage structure and function despite management efforts initiated decades ago comply with EU’s 2000 Water Framework Directive. Fourth, might start being influenced by climate change early signs response warming happening since last 10 yr. According FBI, current improving biological systems France not yet creating desired outcomes.

Language: Английский

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When Do Traits Tell More Than Species about a Metacommunity? A Synthesis across Ecosystems and Scales

The American Naturalist, Journal Year: 2023, Volume and Issue: 203(1), P. E1 - E18

Published: Aug. 23, 2023

Linking species traits with the variation in assemblages across habitats has often proved useful for developing a more mechanistic understanding of distributions metacommunities. However, summarizing rich tapestry all its nuance few key ecological can also lead to an abstraction that provides less predictability than when using taxonomy alone. As further complication, taxonomic and functional diversities be inequitably compared, either by integrating taxonomic-level information into calculation how aspects communities vary or detecting spurious trait-environment relationships. To remedy this, we here synthesize analyses 80 datasets on different taxa, ecosystems, spatial scales include abundance presence/absence sites variable environmental conditions species’ traits. By treat diversity equitably, ask helps explain metacommunity structure. We found patterns explained structure response only 25% multitrait approach but up 59% single-trait approach. Nevertheless, average 19% (interquartile range = 0%–29%) showed significant signal gradients. Species-level traits, as typically collected analyzed through patterns, do not bring predictive advantages over what already holds. While our assessment limited advantage was largely true played role explaining many were used trait constructs related status, life history, mobility. propose future research directions make trait-based approaches data helpful inference ecology.

Language: Английский

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European river typologies fail to capture diatom, fish, and macrophyte community composition

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 896, P. 165081 - 165081

Published: June 24, 2023

Language: Английский

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Linking Micropollutants to Trait Syndromes across Freshwater Diatom, Macroinvertebrate, and Fish Assemblages

Water, Journal Year: 2022, Volume and Issue: 14(8), P. 1184 - 1184

Published: April 7, 2022

The ecological quality of freshwater ecosystems is endangered by various micropollutants released into the environment human activities. cumulative effects these can affect fitness organisms and populations functional diversity stream ecosystems. In this study, we investigated relationships between joint toxicity trait syndromes. A syndrome corresponds to a combination traits that could occur together in communities due selection driven exposure micropollutants. Our objectives were (i) identify syndromes specific diatom, macroinvertebrate, fish assemblages their responses exposure, taking account four micropollutant types (mineral micropollutants, pesticides, PAHs, other organic micropollutants) nine modes action (only for pesticides), (ii) explore how vary within among three biological compartments, (iii) investigate categories driving (iv) taxa, so-called paragons, which are highly representative To achieve objectives, analyzed dataset including physico-chemical results 2007 sampling events from large-scale monitoring survey routinely performed French wadeable streams. We have identified five (diatoms), eight (macroinvertebrates), (fishes) syndromes, either positively or negatively related an increasing gradient different clusters action. analyses several key sets exhibiting good potential highlighting Overall, might represent novel integrative bioassessment tool, trait-based gradients toxic cocktails.

Language: Английский

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