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- W4226264551 abstract "Thermokarst lakes are forming from permafrost thaw and are severely affected by accelerating climate change. Sediment and water in these lakes are distinct habitats but closely connected. However, our understanding of the differences and linkages between sediment and water in thermokarst lakes remains largely unknown, especially from the perspective of community assembly mechanisms. Here, we examined bacterial communities in sediment and water in thermokarst lakes in the Yellow River Source area, Qinghai-Tibet Plateau. Bacterial taxa were divided into abundant and rare according to their relative abundance, and the Sorensen dissimilarity (β sor ) was partitioned into turnover (β turn ) and nestedness (β nest ). The whole bacterial communities and the abundant and rare subcommunities differed substantially between sediment and water in taxonomical composition, α-diversity, and β-diversity. Sediment had significantly lower α-diversity indexes but higher β-diversity than water. In general, bacterial communities are predominantly governed by strong turnover processes (β turn /β sor ratio of 0.925). Bacterial communities in sediment had a significantly higher β turn /β sor ratio than in water. Abundant subcommunities were significantly lower in the β turn /β sor ratio compared with rare subcommunities. The results suggest that the bacterial communities of thermokarst lakes, especially rare subcommunities or particularly in sediment, might be strongly structured by heterogeneity in the source material, environmental filtering, and geographical isolation, leading to compositionally distinct communities. This integral study increased our current knowledge of thermokarst lakes, enhancing our understanding of the community assembly rules and ecosystem structures and processes of these rapidly changing and vulnerable ecosystems." @default.
- W4226264551 created "2022-05-05" @default.
- W4226264551 creator A5032335035 @default.
- W4226264551 creator A5037651465 @default.
- W4226264551 creator A5044438221 @default.
- W4226264551 creator A5046803466 @default.
- W4226264551 creator A5075596275 @default.
- W4226264551 date "2022-03-29" @default.
- W4226264551 modified "2023-10-17" @default.
- W4226264551 title "Abundant and Rare Bacterial Taxa Structuring Differently in Sediment and Water in Thermokarst Lakes in the Yellow River Source Area, Qinghai-Tibet Plateau" @default.
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