Relative Roles of Deterministic and Stochastic Processes in Driving the Vertical Distribution of Bacterial Communities in a Permafrost Core from the Qinghai-Tibet Plateau, China
Understanding the processes that influence the structure of biotic communities is one of the major ecological topics, and both stochastic and deterministic processes are expected to be at work simultaneously in most communities. Here, we investigated the vertical distribution patterns of bacterial c...
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ftpubmed:oai:pubmedcentral.nih.gov:4689587 2023-05-15T17:56:23+02:00 Relative Roles of Deterministic and Stochastic Processes in Driving the Vertical Distribution of Bacterial Communities in a Permafrost Core from the Qinghai-Tibet Plateau, China Hu, Weigang Zhang, Qi Tian, Tian Li, Dingyao Cheng, Gang Mu, Jing Wu, Qingbai Niu, Fujun Stegen, James C. An, Lizhe Feng, Huyuan 2015-12-23 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4689587/ http://www.ncbi.nlm.nih.gov/pubmed/26699734 https://doi.org/10.1371/journal.pone.0145747 en eng Public Library of Science http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4689587/ http://www.ncbi.nlm.nih.gov/pubmed/26699734 http://dx.doi.org/10.1371/journal.pone.0145747 © 2015 Hu et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited CC-BY Research Article Text 2015 ftpubmed https://doi.org/10.1371/journal.pone.0145747 2016-01-03T01:35:07Z Understanding the processes that influence the structure of biotic communities is one of the major ecological topics, and both stochastic and deterministic processes are expected to be at work simultaneously in most communities. Here, we investigated the vertical distribution patterns of bacterial communities in a 10-m-long soil core taken within permafrost of the Qinghai-Tibet Plateau. To get a better understanding of the forces that govern these patterns, we examined the diversity and structure of bacterial communities, and the change in community composition along the vertical distance (spatial turnover) from both taxonomic and phylogenetic perspectives. Measures of taxonomic and phylogenetic beta diversity revealed that bacterial community composition changed continuously along the soil core, and showed a vertical distance-decay relationship. Multiple stepwise regression analysis suggested that bacterial alpha diversity and phylogenetic structure were strongly correlated with soil conductivity and pH but weakly correlated with depth. There was evidence that deterministic and stochastic processes collectively drived bacterial vertically-structured pattern. Bacterial communities in five soil horizons (two originated from the active layer and three from permafrost) of the permafrost core were phylogenetically random, indicator of stochastic processes. However, we found a stronger effect of deterministic processes related to soil pH, conductivity, and organic carbon content that were structuring the bacterial communities. We therefore conclude that the vertical distribution of bacterial communities was governed primarily by deterministic ecological selection, although stochastic processes were also at work. Furthermore, the strong impact of environmental conditions (for example, soil physicochemical parameters and seasonal freeze-thaw cycles) on these communities underlines the sensitivity of permafrost microorganisms to climate change and potentially subsequent permafrost thaw. Text permafrost PubMed Central (PMC) PLOS ONE 10 12 e0145747 |
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Research Article Hu, Weigang Zhang, Qi Tian, Tian Li, Dingyao Cheng, Gang Mu, Jing Wu, Qingbai Niu, Fujun Stegen, James C. An, Lizhe Feng, Huyuan Relative Roles of Deterministic and Stochastic Processes in Driving the Vertical Distribution of Bacterial Communities in a Permafrost Core from the Qinghai-Tibet Plateau, China |
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Research Article |
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Understanding the processes that influence the structure of biotic communities is one of the major ecological topics, and both stochastic and deterministic processes are expected to be at work simultaneously in most communities. Here, we investigated the vertical distribution patterns of bacterial communities in a 10-m-long soil core taken within permafrost of the Qinghai-Tibet Plateau. To get a better understanding of the forces that govern these patterns, we examined the diversity and structure of bacterial communities, and the change in community composition along the vertical distance (spatial turnover) from both taxonomic and phylogenetic perspectives. Measures of taxonomic and phylogenetic beta diversity revealed that bacterial community composition changed continuously along the soil core, and showed a vertical distance-decay relationship. Multiple stepwise regression analysis suggested that bacterial alpha diversity and phylogenetic structure were strongly correlated with soil conductivity and pH but weakly correlated with depth. There was evidence that deterministic and stochastic processes collectively drived bacterial vertically-structured pattern. Bacterial communities in five soil horizons (two originated from the active layer and three from permafrost) of the permafrost core were phylogenetically random, indicator of stochastic processes. However, we found a stronger effect of deterministic processes related to soil pH, conductivity, and organic carbon content that were structuring the bacterial communities. We therefore conclude that the vertical distribution of bacterial communities was governed primarily by deterministic ecological selection, although stochastic processes were also at work. Furthermore, the strong impact of environmental conditions (for example, soil physicochemical parameters and seasonal freeze-thaw cycles) on these communities underlines the sensitivity of permafrost microorganisms to climate change and potentially subsequent permafrost thaw. |
format |
Text |
author |
Hu, Weigang Zhang, Qi Tian, Tian Li, Dingyao Cheng, Gang Mu, Jing Wu, Qingbai Niu, Fujun Stegen, James C. An, Lizhe Feng, Huyuan |
author_facet |
Hu, Weigang Zhang, Qi Tian, Tian Li, Dingyao Cheng, Gang Mu, Jing Wu, Qingbai Niu, Fujun Stegen, James C. An, Lizhe Feng, Huyuan |
author_sort |
Hu, Weigang |
title |
Relative Roles of Deterministic and Stochastic Processes in Driving the Vertical Distribution of Bacterial Communities in a Permafrost Core from the Qinghai-Tibet Plateau, China |
title_short |
Relative Roles of Deterministic and Stochastic Processes in Driving the Vertical Distribution of Bacterial Communities in a Permafrost Core from the Qinghai-Tibet Plateau, China |
title_full |
Relative Roles of Deterministic and Stochastic Processes in Driving the Vertical Distribution of Bacterial Communities in a Permafrost Core from the Qinghai-Tibet Plateau, China |
title_fullStr |
Relative Roles of Deterministic and Stochastic Processes in Driving the Vertical Distribution of Bacterial Communities in a Permafrost Core from the Qinghai-Tibet Plateau, China |
title_full_unstemmed |
Relative Roles of Deterministic and Stochastic Processes in Driving the Vertical Distribution of Bacterial Communities in a Permafrost Core from the Qinghai-Tibet Plateau, China |
title_sort |
relative roles of deterministic and stochastic processes in driving the vertical distribution of bacterial communities in a permafrost core from the qinghai-tibet plateau, china |
publisher |
Public Library of Science |
publishDate |
2015 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4689587/ http://www.ncbi.nlm.nih.gov/pubmed/26699734 https://doi.org/10.1371/journal.pone.0145747 |
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permafrost |
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permafrost |
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4689587/ http://www.ncbi.nlm.nih.gov/pubmed/26699734 http://dx.doi.org/10.1371/journal.pone.0145747 |
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© 2015 Hu et al http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited |
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https://doi.org/10.1371/journal.pone.0145747 |
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