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      Hydrological and environmental variables outperform spatial factors in structuring species, trait composition, and beta diversity of pelagic algae

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          Abstract

          There has been increasing interest in algae‐based bioassessment, particularly, trait‐based approaches are increasingly suggested. However, the main drivers, especially the contribution of hydrological variables, of species composition, trait composition, and beta diversity of algae communities are less studied. To link species and trait composition to multiple factors (i.e., hydrological variables, local environmental variables, and spatial factors) that potentially control species occurrence/abundance and to determine their relative roles in shaping species composition, trait composition, and beta diversities of pelagic algae communities, samples were collected from a German lowland catchment, where a well‐proven ecohydrological modeling enabled to predict long‐term discharges at each sampling site. Both trait and species composition showed significant correlations with hydrological, environmental, and spatial variables, and variation partitioning revealed that the hydrological and local environmental variables outperformed spatial variables. A higher variation of trait composition (57.0%) than species composition (37.5%) could be explained by abiotic factors. Mantel tests showed that both species and trait‐based beta diversities were mostly related to hydrological and environmental heterogeneity with hydrological contributing more than environmental variables, while purely spatial impact was less important. Our findings revealed the relative importance of hydrological variables in shaping pelagic algae community and their spatial patterns of beta diversities, emphasizing the need to include hydrological variables in long‐term biomonitoring campaigns and biodiversity conservation or restoration. A key implication for biodiversity conservation was that maintaining the instream flow regime and keeping various habitats among rivers are of vital importance. However, further investigations at multispatial and temporal scales are greatly needed.

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          Most cited references 68

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          Rebuilding community ecology from functional traits.

          There is considerable debate about whether community ecology will ever produce general principles. We suggest here that this can be achieved but that community ecology has lost its way by focusing on pairwise species interactions independent of the environment. We assert that community ecology should return to an emphasis on four themes that are tied together by a two-step process: how the fundamental niche is governed by functional traits within the context of abiotic environmental gradients; and how the interaction between traits and fundamental niches maps onto the realized niche in the context of a biotic interaction milieu. We suggest this approach can create a more quantitative and predictive science that can more readily address issues of global change.
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            Trait-Based Community Ecology of Phytoplankton

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              Redundancy and the choice of hydrologic indices for characterizing streamflow regimes

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                Author and article information

                Contributors
                nwu@aias.au.dk , naichengwu88@gmail.com
                Journal
                Ecol Evol
                Ecol Evol
                10.1002/(ISSN)2045-7758
                ECE3
                Ecology and Evolution
                John Wiley and Sons Inc. (Hoboken )
                2045-7758
                14 February 2018
                March 2018
                : 8
                : 5 ( doiID: 10.1002/ece3.2018.8.issue-5 )
                : 2947-2961
                Affiliations
                [ 1 ] Department of Hydrology and Water Resources Management Institute for Natural Resource Conservation Kiel University Kiel Germany
                [ 2 ] Aarhus Institute of Advanced Studies Aarhus University Aarhus C Denmark
                [ 3 ] Department of Bioscience Aarhus University Aarhus C Denmark
                [ 4 ] GFZ German Research Centre for Geosciences Section Hydrology Potsdam Germany
                [ 5 ] Helmholtz Centre for Ocean Research Kiel (GEOMAR) Kiel Germany
                Author notes
                [* ] Correspondence

                Naicheng Wu, Department of Hydrology and Water Resources Management, Institute for Natural Resource Conservation, Kiel University, Kiel, Germany.

                Emails: nwu@ 123456aias.au.dk ; naichengwu88@ 123456gmail.com

                Article
                ECE33903
                10.1002/ece3.3903
                5838050
                © 2018 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd.

                This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

                Page count
                Figures: 4, Tables: 3, Pages: 15, Words: 11913
                Product
                Funding
                Funded by: China Scholarship Council
                Funded by: European Commission through the program Erasmus Mundus Master Course
                Award ID: FPA 2023‐0224/532524‐1‐FR‐2012‐1‐ERA MUNDUS
                Funded by: Deutsche Forschungsgemeinschaft
                Award ID: FO 301/15‐1
                Award ID: FO 301/15‐2
                Award ID: WU 749/1‐1,
                Award ID: WU 749/1‐2 and GU 1466/1‐1
                Funded by: AIAS CO‐FUND grant
                Categories
                Original Research
                Original Research
                Custom metadata
                2.0
                ece33903
                March 2018
                Converter:WILEY_ML3GV2_TO_NLMPMC version:version=5.3.2.2 mode:remove_FC converted:05.03.2018

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