No biotic homogenisation across decades but consistent effects of landscape position and pH on macrophyte communities in boreal lakes

Ecography, Год журнала: 2019, Номер 43(2), С. 294 - 305

Опубликована: Окт. 22, 2019

It has been predicted that spatial beta diversity shows a decreasing trend in the Anthropocene due to increasing human impact, causing biotic homogenisation. We aimed discover if vascular aquatic macrophyte communities show different patterns relation land use and environmental characteristics decades from 1940s 2010s. structures differ between species‐, phylogeny‐ functional‐based diversity. used presence–absence data of macrophytes five small boreal lakes. utilized generalised dissimilarity modelling analyse gradients. found lake elevation pH were most important variables each decade, while was not particularly shaping patterns. did find signs our study area during past 70 yr. either homogenisation or differentiation (taxonomic, phylogenetic functional). Vascular showed only slightly impact across decades. The facets diverged other. Lake position landscape, reflecting both natural connectivity characteristics, explained diversity, probably because faced modest changes 2010s when compared globally. Our highlights fact is an unambiguous process acting similarly at all temporal scales environments organism groups.

Язык: Английский

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Temporal beta diversity of lake plants is determined by concomitant changes in environmental factors across decades

Journal of Ecology, Год журнала: 2020, Номер 109(2), С. 819 - 832

Опубликована: Сен. 23, 2020

Abstract To comprehensively understand the impact of anthropogenic activities on biodiversity, we must how biodiversity has changed over time and what are underlying processes. A growing body evidence shown that beta diversity reveals more about temporal changes in compared with alpha diversity. Temporal indicates, for example, degrees change species composition at single locations through time. We examined whether freshwater plant communities showed different patterns relation to concomitant environmental conditions across decades. do this, used presence–absence data lake plants five decades (1940s–2010s) from southern Finland calculated indices (TBI) each between pairs whole community, hydrophytes helophytes. get insights into possible processes behind observed trends, decomposed TBIs contributed by either losses or gains species. related their loss gain components landscape position variables. Based comparisons survey decade pairs, aquatic was modest Hydrophyte assemblages have than helophyte assemblages. The main occurred 1940s 1970s, when new dominant process lakes throughout landscape. Following period, there only changes, but 2000s 2010s, played a key role explaining TBI. Our results relying two points can result limited knowledge ecological phenomenon under study and, an exceptional year terms weather hinder detecting overall long‐term trends compositional changes. Therefore, future studies should try combine several overcome typical limitations information.

Язык: Английский

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Agricultural activities compromise ecosystem health and functioning of rivers: Insights from multivariate and multimetric analyses of macroinvertebrate assemblages

Environmental Pollution, Год журнала: 2021, Номер 275, С. 116655 - 116655

Опубликована: Фев. 5, 2021

Язык: Английский

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Multiple anthropogenic stressors influence the taxonomic and functional homogenization of macroinvertebrate communities on the mainstream of an urban-agricultural river in China

Journal of Environmental Management, Год журнала: 2023, Номер 341, С. 118017 - 118017

Опубликована: Май 5, 2023

Язык: Английский

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Responses of phytoplankton and periphyton community structure to an anthropic eutrophication gradient in tropical high-altitude Lake Titicaca

Journal of Great Lakes Research, Год журнала: 2024, Номер 50(2), С. 102294 - 102294

Опубликована: Янв. 21, 2024

Язык: Английский

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Mapping of Major Land-Use Changes in the Kolleru Lake Freshwater Ecosystem by Using Landsat Satellite Images in Google Earth Engine

Water, Год журнала: 2020, Номер 12(9), С. 2493 - 2493

Опубликована: Сен. 7, 2020

India’s largest freshwater ecosystem of the Kolleru Lake has experienced severe threats by land-use changes, including construction illegal fishponds around lake area over past five decades. Despite efforts to protect and restore its riparian zones, environmental pressures have increased time. The present study provides a synthesis human activities through major changes both before after restoration measures. For this purpose, archives all Landsat imageries from last three decades were used detect land cover changes. Using Google Earth Engine cloud platform, different scenarios classified for year (1999), 2008 immediately restoration, 2018, i.e., current situation one decade afterward. Additionally, NDVI (Normalized Difference Vegetation Index) NDWI Water indices identify dynamics. results show that was successful; consequently, decade, transformed into previous state (i.e., 1999 situation). In 1999, 29.7% occupied fishponds, and, sustainable 27.7% almost reaching extent situation. On hand, aquaculture is most promising sources income, but there also limited awareness negative impacts among local residents. other political commitment weak, integrated approaches considering stakeholders are lacking. Nevertheless, alterations water use, increasing nutrient concentrations, sediment inputs basin reached level at which they threaten biodiversity functionality wetland degree immediate action necessary prevent irreversible degradation.

Язык: Английский

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Biodiversity buffers the impact of eutrophication on ecosystem functioning of submerged macrophytes on the Yunnan-Guizhou Plateau, Southwest China

Environmental Pollution, Год журнала: 2022, Номер 314, С. 120210 - 120210

Опубликована: Сен. 25, 2022

Язык: Английский

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Responses of macroinvertebrate functional trait structure to river damming: From within-river to basin-scale patterns

Environmental Research, Год журнала: 2023, Номер 220, С. 115255 - 115255

Опубликована: Янв. 9, 2023

Язык: Английский

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Functional and Taxonomic Differentiation of Macrophyte Assemblages Across the Yangtze River Floodplain Under Human Impacts

Frontiers in Plant Science, Год журнала: 2018, Номер 9

Опубликована: Март 27, 2018

Human activities and the consequent extirpations of species have been changing composition assemblages worldwide. These anthropogenic impacts alter not only richness but also biological dissimilarity among them. One main gaps in assessment biodiversity change freshwater ecosystems is our limited understanding regarding how taxonomic functional facets macrophyte respond to human on regional scales. Here, we assess temporal (before 1970s against after 2000s) changes compositional dissimilarities, partitioned into its turnover nestedness components, across floodplain lakes Yangtze River China. We found that assemblage differentiation occurred simultaneously under increasing impact, concomitant a general decrease richness. However, this effect weakened when historical level was high. Macrophyte with large dispersal range submersed life form were significantly more susceptible extirpation. The impact complex habitat loss fishery intensity consistently drivers these lakes, whereas water quality (i.e., light pollution nutrient enrichment) had weaker effects. Further, mainly driven by component dissimilarity, accounting for related independent replacement. This result, markedly different from previous studies fish conducted represents novel contribution toward achieving holistic contribute shape community natural ecosystems.

Язык: Английский

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Changes in the functional features of macrophyte communities and driving factors across a 70-year period

Hydrobiologia, Год журнала: 2020, Номер 847(18), С. 3811 - 3827

Опубликована: Янв. 4, 2020

Abstract Functional homogenisation occurs across many areas and organism groups, thereby seriously affecting biodiversity loss ecosystem functioning. In this study, we examined how functional features of aquatic macrophytes have changed during a 70-year period at community species levels in boreal lake district. At the level, if macrophyte communities showed different spatial patterns composition richness relation to main environmental drivers between time periods. We also observed each space assess with certain sets traits become more common or rare study period. found changes relationship environment. The two periods, for these were partly different. Temporal only partially linked concomitant environment, while stable factors important. Species’ not associated commonness rarity patterns. Our findings revealed that has occurred lakes, ranging from small oligotrophic forest lakes larger affected by human impacts.

Язык: Английский

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