Abundant and Rare Bacterial Taxa Structuring Differently in Sediment and Water in Thermokarst Lakes in the Yellow River Source Area, Qinghai-Tibet Plateau
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 remai...
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ftdoajarticles:oai:doaj.org/article:f4647a6a926f441e87f2f0edae7fda17 2023-05-15T17:58:06+02:00 Abundant and Rare Bacterial Taxa Structuring Differently in Sediment and Water in Thermokarst Lakes in the Yellow River Source Area, Qinghai-Tibet Plateau Ze Ren Cheng Zhang Xia Li Kang Ma Baoshan Cui 2022-03-01T00:00:00Z https://doi.org/10.3389/fmicb.2022.774514 https://doaj.org/article/f4647a6a926f441e87f2f0edae7fda17 EN eng Frontiers Media S.A. https://www.frontiersin.org/articles/10.3389/fmicb.2022.774514/full https://doaj.org/toc/1664-302X 1664-302X doi:10.3389/fmicb.2022.774514 https://doaj.org/article/f4647a6a926f441e87f2f0edae7fda17 Frontiers in Microbiology, Vol 13 (2022) thermokarst lakes Qinghai-Tibet Plateau species turnover nestedness abundant and rare taxa 16S Microbiology QR1-502 article 2022 ftdoajarticles https://doi.org/10.3389/fmicb.2022.774514 2022-12-31T08:12:42Z 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 (βsor) was partitioned into turnover (βturn) and nestedness (βnest). 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 (βturn/βsor ratio of 0.925). Bacterial communities in sediment had a significantly higher βturn/βsor ratio than in water. Abundant subcommunities were significantly lower in the βturn/βsor 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. Article in Journal/Newspaper permafrost Thermokarst Directory of Open Access Journals: DOAJ Articles Frontiers in Microbiology 13 |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
language |
English |
topic |
thermokarst lakes Qinghai-Tibet Plateau species turnover nestedness abundant and rare taxa 16S Microbiology QR1-502 |
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thermokarst lakes Qinghai-Tibet Plateau species turnover nestedness abundant and rare taxa 16S Microbiology QR1-502 Ze Ren Cheng Zhang Xia Li Kang Ma Baoshan Cui Abundant and Rare Bacterial Taxa Structuring Differently in Sediment and Water in Thermokarst Lakes in the Yellow River Source Area, Qinghai-Tibet Plateau |
topic_facet |
thermokarst lakes Qinghai-Tibet Plateau species turnover nestedness abundant and rare taxa 16S Microbiology QR1-502 |
description |
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 (βsor) was partitioned into turnover (βturn) and nestedness (βnest). 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 (βturn/βsor ratio of 0.925). Bacterial communities in sediment had a significantly higher βturn/βsor ratio than in water. Abundant subcommunities were significantly lower in the βturn/βsor 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. |
format |
Article in Journal/Newspaper |
author |
Ze Ren Cheng Zhang Xia Li Kang Ma Baoshan Cui |
author_facet |
Ze Ren Cheng Zhang Xia Li Kang Ma Baoshan Cui |
author_sort |
Ze Ren |
title |
Abundant and Rare Bacterial Taxa Structuring Differently in Sediment and Water in Thermokarst Lakes in the Yellow River Source Area, Qinghai-Tibet Plateau |
title_short |
Abundant and Rare Bacterial Taxa Structuring Differently in Sediment and Water in Thermokarst Lakes in the Yellow River Source Area, Qinghai-Tibet Plateau |
title_full |
Abundant and Rare Bacterial Taxa Structuring Differently in Sediment and Water in Thermokarst Lakes in the Yellow River Source Area, Qinghai-Tibet Plateau |
title_fullStr |
Abundant and Rare Bacterial Taxa Structuring Differently in Sediment and Water in Thermokarst Lakes in the Yellow River Source Area, Qinghai-Tibet Plateau |
title_full_unstemmed |
Abundant and Rare Bacterial Taxa Structuring Differently in Sediment and Water in Thermokarst Lakes in the Yellow River Source Area, Qinghai-Tibet Plateau |
title_sort |
abundant and rare bacterial taxa structuring differently in sediment and water in thermokarst lakes in the yellow river source area, qinghai-tibet plateau |
publisher |
Frontiers Media S.A. |
publishDate |
2022 |
url |
https://doi.org/10.3389/fmicb.2022.774514 https://doaj.org/article/f4647a6a926f441e87f2f0edae7fda17 |
genre |
permafrost Thermokarst |
genre_facet |
permafrost Thermokarst |
op_source |
Frontiers in Microbiology, Vol 13 (2022) |
op_relation |
https://www.frontiersin.org/articles/10.3389/fmicb.2022.774514/full https://doaj.org/toc/1664-302X 1664-302X doi:10.3389/fmicb.2022.774514 https://doaj.org/article/f4647a6a926f441e87f2f0edae7fda17 |
op_doi |
https://doi.org/10.3389/fmicb.2022.774514 |
container_title |
Frontiers in Microbiology |
container_volume |
13 |
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1766166645413249024 |