Lakes in the era of global change: moving beyond single‐lake thinking in maintaining biodiversity and ecosystem services

Biological reviews/Biological reviews of the Cambridge Philosophical Society, Journal Year: 2020, Volume and Issue: 96(1), P. 89 - 106

Published: Sept. 1, 2020

ABSTRACT The Anthropocene presents formidable threats to freshwater ecosystems. Lakes are especially vulnerable and important at the same time. They cover only a small area worldwide but harbour high levels of biodiversity contribute disproportionately ecosystem services. differ with respect their general type (e.g. land‐locked, drainage, floodplain large lakes) position in landscape highland versus lowland lakes), which dynamics these systems. should be generally viewed as ‘meta‐systems’, whereby is strongly affected by species dispersal, contributed flow matter substances among locations broader waterscape context. Lake connectivity determine degree lake prone invasion non‐native accumulation harmful substances. Highly connected lakes low accumulate nutrients pollutants originating from ecosystems higher landscape. monitoring restoration services consider fact that dynamism present local, regional global scales. However, local may plagued unpredictability ecological phenomena, hindering adaptive management lakes. Although data increasingly becoming available study responses change, we still lack suitable integration models for entire waterscapes. Research across disciplinary boundaries needed address challenges face because they play an role harbouring unique aquatic biota well providing goods future.

Language: Английский

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Does isolation influence the relative role of environmental and dispersal‐related processes in stream networks? An empirical test of the network position hypothesis using multiple taxa

Freshwater Biology, Journal Year: 2017, Volume and Issue: 63(1), P. 74 - 85

Published: July 23, 2017

Abstract Quantifying the relative importance of how local (environmental or niche‐based) and regional (dispersal‐related spatial) processes regulate assembly communities has become one main research avenues community ecology. It been shown that degree isolation habitats in landscape may substantially influence role environmental filtering dispersal‐related metacommunities. Dendritic stream networks are unique landscape, where more isolated upstream sites have predicted to be primarily structured by variables, while central mainstem rivers both spatial variables (hereafter network position hypothesis, NPH ). However, almost exclusively tested for macroinvertebrates, therefore its predictions warrant confirmation from multiple taxa. We examined validity benthic diatoms, macrophytes, macroinvertebrates fish Pannon Ecoregion, Hungary. Following we a clear dominance over headwaters, larger effect compared headwaters. these using variance partitioning analyses separately different taxa headwater riverine habitats. found large differences explained when impact (physical chemical) (overland watercourse distance) various was studied. In general, total lower passively dispersing plant than animal with active dispersal streams rivers. similar other studies, low Community structure diatoms could best streams, whereas their not either variable group The significance depended on distance measure versus watercourse) case macrophytes. Moreover, variation predictors macroinvertebrate were divided into flying non‐flying groups, suggesting mode explaining variation. Finally, fishes only conclusion, no evidence our multi‐taxa comparison. For example, patterns seem support , those run counter . This study thus shows behave differently effects networks. discuss alternatives interpretation (or which partly explain observed emphasise need further studies unravelling metacommunity structuring.

Language: Английский

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Urbanization reduces resource use efficiency of phytoplankton community by altering the environment and decreasing biodiversity

Journal of Environmental Sciences, Journal Year: 2021, Volume and Issue: 112, P. 140 - 151

Published: June 3, 2021

Language: Английский

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Assembly processes inferred from eDNA surveys of a pond metacommunity are consistent with known species ecologies

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

Published: Feb. 4, 2025

Technological advances are enabling ecologists to conduct large‐scale and structured community surveys. However, it is unclear how best extract information from these novel data. We metabarcoded 48 vertebrate species their eDNA in 320 ponds across England applied the ‘internal structure' approach, which uses joint distribution models (JSDMs) explain compositions as result of four metacommunity processes: environmental filtering, dispersal, interactions, stochasticity. confirm that filtering plays an important role assembly, find species' estimated preferences consistent with known ecologies. also detect negative biotic covariances between fish amphibians after controlling for divergent preferences, predator–prey interactions (likely mediated by predator avoidance behaviour), we high spatial autocorrelation palmate newt, its hypothesised relict distribution. Promisingly, ecologically spatially distinctive sites better explained covariates geographic locations, respectively, revealing where dispersal limitation act more strongly. These results recent proposal applying JSDMs patterns can help reveal relative importance limitation, interaction processes individual species. Our highlight value modern interpretation ecology, embraces fact assembly differ among sites. discuss data allow several study design improvements will strengthen inference observational

Language: Английский

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Plankton metacommunities in floodplain wetlands under contrasting hydrological conditions

Freshwater Biology, Journal Year: 2018, Volume and Issue: 63(4), P. 380 - 391

Published: Feb. 7, 2018

Species diversity is affected by processes operating at multiple spatial scales, although the most relevant scales that contribute to compositional variation and temporal shifts of involved mechanisms remain poorly explored. We studied patterns phytoplankton, rotifers microcrustacean across in a river floodplain system Danube Austria under contrasting hydrological conditions (post-flood versus low water level).The species turnover between sections (β2) wetlands (β3) was major components regional for all groups, with habitats (β1) as minor contributor. β1 β2 were lower than expected chance cases, suggesting communities are more homogeneous these scales. β3 higher many indicating distinct wetland level. Patterns highly similar different conditions, no immediate effect flood events.Local environmental factors similarly important structuring rotifer both conditions. Relevant spatially structured post-flood especially sections, flood-driven homogenisation within wetlands. Under level, environment decreased pure gained relevance phytoplankton rotifers.Our results suggest component diversity, long-term responding connectivity structure communities. Aquatic limited extent remaining areas appear probably due recurrence over years.These highlight adequate planning restoration conservation strategies should consider heterogeneity together processes.

Language: Английский

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Differently dispersing organism groups show contrasting beta diversity patterns in a dammed subtropical river basin

The Science of The Total Environment, Journal Year: 2019, Volume and Issue: 691, P. 1271 - 1281

Published: July 16, 2019

Language: Английский

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Lake regionalization and diatom metacommunity structuring in tropical South America

Ecology and Evolution, Journal Year: 2018, Volume and Issue: 8(16), P. 7865 - 7878

Published: July 13, 2018

Lakes and their topological distribution across Earth's surface impose ecological evolutionary constraints on aquatic metacommunities. In this study, we group similar lake ecosystems as metacommunity units influencing diatom community structure. We assembled a database of 195 lakes from the tropical Andes adjacent lowlands (8°N-30°S 58-79°W) with associated environmental predictors to examine patterns at two different levels: taxon functional (deconstructed species matrix by guilds). also derived spatial variables that inherently assessed relative role dispersal. Using complementary multivariate statistical techniques (principal component analysis, cluster nonmetric multidimensional scaling, Procrustes, variance partitioning), examined diatom-environment relationships among habitats (sediment surface, periphyton, plankton) partitioned variation evaluate influence niche- dispersal-based assembly processes in structure clusters. The results showed significant association between geographic clusters based gradients climate landscape configuration assemblages. Six distributed along latitudinal gradient were identified for communities. Variance partitioning revealed dispersal mechanisms major contributor structure, but highly context-dependent fashion Andean Altiplano Bolivia, metacommunities are niche constrained either limitation or mass effects, resulting area, heterogeneity, guild relationships. Topographic heterogeneity played an important structuring planktic emphasize value guild-based model linked elucidating underlying distribution. Our findings reveal importance shifts drivers climatic physiographically distinct clusters, providing basis comparison broad-scale lake-rich regions elsewhere. This may help guide future research explore rich Neotropical benthic pool.

Language: Английский

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Global patterns in the metacommunity structuring of lake macrophytes: regional variations and driving factors

Oecologia, Journal Year: 2018, Volume and Issue: 188(4), P. 1167 - 1182

Published: Oct. 29, 2018

We studied community–environment relationships of lake macrophytes at two metacommunity scales using data from 16 regions across the world. More specifically, we examined (a) whether macrophyte communities respond similar to key local environmental factors, major climate variables and spatial locations in each (i.e., within-region approach) (b) how well can explained variability multiple metacommunities be accounted for by elevation range, extent, latitude, longitude, age oldest within across-region approach). In approach, employed partial redundancy analyses together with variation partitioning investigate relative importance variables, location on among study regions. used adjusted R2 values model linear regression commonality analysis. found that niche filtering related lake-level conditions was dominant force structuring metacommunities. However, our results also revealed range associated (increasing temperature amplitude affecting macrophytes) (likely due dispersal limitation) important based findings across-metacommunities These suggest different determinants influence regions, thus showing context dependency. Moreover, emphasized use a single scale gives incomplete information features explaining communities.

Language: Английский

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Elements of metacommunity structure in Amazonian Zygoptera among streams under different spatial scales and environmental conditions

Ecology and Evolution, Journal Year: 2017, Volume and Issue: 7(9), P. 3190 - 3200

Published: March 31, 2017

Abstract An important aspect of conservation is to understand the founding elements and characteristics metacommunities in natural environments, consequences anthropogenic disturbance on these patterns. In Amazonian interfluves major rivers play an role formation areas endemism through historical isolation species speciation process. We evaluated metacommunity structure for Zygoptera (Insecta: Odonata) sampled 93 streams distributed two distinct biogeographic regions (areas endemism). Of streams, 43 were considered have experienced negligible impacts, 50 impacted by activities. Our hypothesis was that preserved (“negligible impact”) would present a Clementsian pattern, forming clusters species, reflecting pattern regions, random patterns metacommunity, due loss more sensitive dominance tolerant which higher dispersal ability environmental tolerance. impact reflected strong we discuss considering rivers. As communities human‐impacted biotic homogenization evident, rare suppressed most common had become hyper‐dominant. Understanding mechanisms trigger changes issue conservation, because they can help create mitigation measures impacts activities biological communities, so should be expanded studies using other taxonomic groups both tropical temperate systems, and, wherever possible, at multiple spatial scales.

Language: Английский

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Measuring the impact of oceanographic indices on species distribution shifts: The spatially varying effect of cold‐pool extent in the eastern Bering Sea

Limnology and Oceanography, Journal Year: 2019, Volume and Issue: 64(6), P. 2632 - 2645

Published: June 25, 2019

Abstract Oceanographers have spent decades developing annual indices that summarize physical conditions in marine ecosystems. Examples include the Pacific Decadal Oscillation, summarizing variation location of warm waters North Pacific, and cold‐pool extent (CPE), area with cold near‐bottom eastern Bering Sea. However, these are rarely included species distribution models used to identify forecast shifts under future climate scenarios. I therefore review three interpretations spatially varying coefficient models, explain how they can be estimate spatial patterns population density associated oceanographic indices, add this option multivariate spatiotemporal model VAST . then use a case study involving bottom trawl data for 17 fish decapod Sea 1982–2017 answer: does CPE region? And (2) effect remain substantial even when local temperature is also as covariate? Results show both identified parsimonious by Akaike Information Criterion 13 species, jointly nearly 9%–14% on average, excess alone. conclude useful way assimilate within hypothesize will account decadal‐scale variability multidecadal forecasts shift.

Language: Английский

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