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- W3043996931 startingPage "2951" @default.
- W3043996931 abstract "How diversity is structured has been a central goal of microbial ecology. In freshwater ecosystems, selection has been found to be the main driver shaping bacterial communities. However, its relative importance compared with other processes (dispersal, drift, diversification) may depend on spatial heterogeneity and the dispersal rates within a metacommunity. Still, a decrease in the role of selection is expected with increasing dispersal homogenization. Here, we investigate the main ecological processes modulating bacterial assembly in contrasting scenarios of environmental heterogeneity. We carried out a spatiotemporal survey in the floodplain system of the Paraná River. The bacterioplankton metacommunity was studied using both statistical inferences based on phylogenetic and taxa turnover as well as co-occurrence networks. We found that selection was the main process determining community assembly even at both extremes of environmental heterogeneity and homogeneity, challenging the general view that the strength of selection is weakened due to dispersal homogenization. The ecological processes acting on the community also determined the connectedness of bacterial networks associations. Heterogeneous selection promoted more interconnected networks increasing β-diversity. Finally, spatiotemporal heterogeneity was an important factor determining the number and identity of the most highly connected taxa in the system. Integrating all these empirical evidences, we propose a new conceptual model that elucidates how the environmental heterogeneity determines the action of the ecological processes shaping the bacterial metacommunity." @default.
- W3043996931 created "2020-07-29" @default.
- W3043996931 creator A5025626166 @default.
- W3043996931 creator A5028292856 @default.
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- W3043996931 creator A5069259212 @default.
- W3043996931 creator A5078368280 @default.
- W3043996931 creator A5087120638 @default.
- W3043996931 date "2020-07-27" @default.
- W3043996931 modified "2023-10-18" @default.
- W3043996931 title "Environmental heterogeneity determines the ecological processes that govern bacterial metacommunity assembly in a floodplain river system" @default.
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