Cargando…

Relative Importance of Deterministic and Stochastic Processes on Soil Microbial Community Assembly in Temperate Grasslands

Changes in species composition across communities, i.e., β-diversity, is a central focus of ecology. Compared to macroorganisms, the β-diversity of soil microbes and its drivers are less studied. Whether the determinants of soil microbial β-diversity are consistent between soil depths and between ab...

Descripción completa

Detalles Bibliográficos
Autores principales: Liu, Nana, Hu, Huifeng, Ma, Wenhong, Deng, Ye, Wang, Qinggang, Luo, Ao, Meng, Jiahui, Feng, Xiaojuan, Wang, Zhiheng
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8469474/
https://www.ncbi.nlm.nih.gov/pubmed/34576824
http://dx.doi.org/10.3390/microorganisms9091929
_version_ 1784573941028749312
author Liu, Nana
Hu, Huifeng
Ma, Wenhong
Deng, Ye
Wang, Qinggang
Luo, Ao
Meng, Jiahui
Feng, Xiaojuan
Wang, Zhiheng
author_facet Liu, Nana
Hu, Huifeng
Ma, Wenhong
Deng, Ye
Wang, Qinggang
Luo, Ao
Meng, Jiahui
Feng, Xiaojuan
Wang, Zhiheng
author_sort Liu, Nana
collection PubMed
description Changes in species composition across communities, i.e., β-diversity, is a central focus of ecology. Compared to macroorganisms, the β-diversity of soil microbes and its drivers are less studied. Whether the determinants of soil microbial β-diversity are consistent between soil depths and between abundant and rare microorganisms remains controversial. Here, using the 16S-rRNA of soil bacteria and archaea sampled at different soil depths (0–10 and 30–50 cm) from 32 sites along an aridity gradient of 1500 km in the temperate grasslands in northern China, we compared the effects of deterministic and stochastic processes on the taxonomic and phylogenetic β-diversity of soil microbes. Using variation partitioning and null models, we found that the taxonomic β-diversity of the overall bacterial communities was more strongly determined by deterministic processes in both soil layers (the explanatory power of environmental distance in topsoil: 25.4%; subsoil: 47.4%), while their phylogenetic counterpart was more strongly determined by stochastic processes (the explanatory power of spatial distance in topsoil: 42.1; subsoil 24.7%). However, in terms of abundance, both the taxonomic and phylogenetic β-diversity of the abundant bacteria in both soil layers was more strongly determined by deterministic processes, while those of rare bacteria were more strongly determined by stochastic processes. In comparison with bacteria, both the taxonomic and phylogenetic β-diversity of the overall abundant and rare archaea were strongly determined by deterministic processes. Among the variables representing deterministic processes, contemporary and historical climate and aboveground vegetation dominated the microbial β-diversity of the overall and abundant microbes of both domains in topsoils, but soil geochemistry dominated in subsoils. This study presents a comprehensive understanding on the β-diversity of soil microbial communities in the temperate grasslands in northern China. Our findings highlight the importance of soil depth, phylogenetic turnover, and species abundance in the assembly processes of soil microbial communities.
format Online
Article
Text
id pubmed-8469474
institution National Center for Biotechnology Information
language English
publishDate 2021
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-84694742021-09-27 Relative Importance of Deterministic and Stochastic Processes on Soil Microbial Community Assembly in Temperate Grasslands Liu, Nana Hu, Huifeng Ma, Wenhong Deng, Ye Wang, Qinggang Luo, Ao Meng, Jiahui Feng, Xiaojuan Wang, Zhiheng Microorganisms Article Changes in species composition across communities, i.e., β-diversity, is a central focus of ecology. Compared to macroorganisms, the β-diversity of soil microbes and its drivers are less studied. Whether the determinants of soil microbial β-diversity are consistent between soil depths and between abundant and rare microorganisms remains controversial. Here, using the 16S-rRNA of soil bacteria and archaea sampled at different soil depths (0–10 and 30–50 cm) from 32 sites along an aridity gradient of 1500 km in the temperate grasslands in northern China, we compared the effects of deterministic and stochastic processes on the taxonomic and phylogenetic β-diversity of soil microbes. Using variation partitioning and null models, we found that the taxonomic β-diversity of the overall bacterial communities was more strongly determined by deterministic processes in both soil layers (the explanatory power of environmental distance in topsoil: 25.4%; subsoil: 47.4%), while their phylogenetic counterpart was more strongly determined by stochastic processes (the explanatory power of spatial distance in topsoil: 42.1; subsoil 24.7%). However, in terms of abundance, both the taxonomic and phylogenetic β-diversity of the abundant bacteria in both soil layers was more strongly determined by deterministic processes, while those of rare bacteria were more strongly determined by stochastic processes. In comparison with bacteria, both the taxonomic and phylogenetic β-diversity of the overall abundant and rare archaea were strongly determined by deterministic processes. Among the variables representing deterministic processes, contemporary and historical climate and aboveground vegetation dominated the microbial β-diversity of the overall and abundant microbes of both domains in topsoils, but soil geochemistry dominated in subsoils. This study presents a comprehensive understanding on the β-diversity of soil microbial communities in the temperate grasslands in northern China. Our findings highlight the importance of soil depth, phylogenetic turnover, and species abundance in the assembly processes of soil microbial communities. MDPI 2021-09-10 /pmc/articles/PMC8469474/ /pubmed/34576824 http://dx.doi.org/10.3390/microorganisms9091929 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Liu, Nana
Hu, Huifeng
Ma, Wenhong
Deng, Ye
Wang, Qinggang
Luo, Ao
Meng, Jiahui
Feng, Xiaojuan
Wang, Zhiheng
Relative Importance of Deterministic and Stochastic Processes on Soil Microbial Community Assembly in Temperate Grasslands
title Relative Importance of Deterministic and Stochastic Processes on Soil Microbial Community Assembly in Temperate Grasslands
title_full Relative Importance of Deterministic and Stochastic Processes on Soil Microbial Community Assembly in Temperate Grasslands
title_fullStr Relative Importance of Deterministic and Stochastic Processes on Soil Microbial Community Assembly in Temperate Grasslands
title_full_unstemmed Relative Importance of Deterministic and Stochastic Processes on Soil Microbial Community Assembly in Temperate Grasslands
title_short Relative Importance of Deterministic and Stochastic Processes on Soil Microbial Community Assembly in Temperate Grasslands
title_sort relative importance of deterministic and stochastic processes on soil microbial community assembly in temperate grasslands
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8469474/
https://www.ncbi.nlm.nih.gov/pubmed/34576824
http://dx.doi.org/10.3390/microorganisms9091929
work_keys_str_mv AT liunana relativeimportanceofdeterministicandstochasticprocessesonsoilmicrobialcommunityassemblyintemperategrasslands
AT huhuifeng relativeimportanceofdeterministicandstochasticprocessesonsoilmicrobialcommunityassemblyintemperategrasslands
AT mawenhong relativeimportanceofdeterministicandstochasticprocessesonsoilmicrobialcommunityassemblyintemperategrasslands
AT dengye relativeimportanceofdeterministicandstochasticprocessesonsoilmicrobialcommunityassemblyintemperategrasslands
AT wangqinggang relativeimportanceofdeterministicandstochasticprocessesonsoilmicrobialcommunityassemblyintemperategrasslands
AT luoao relativeimportanceofdeterministicandstochasticprocessesonsoilmicrobialcommunityassemblyintemperategrasslands
AT mengjiahui relativeimportanceofdeterministicandstochasticprocessesonsoilmicrobialcommunityassemblyintemperategrasslands
AT fengxiaojuan relativeimportanceofdeterministicandstochasticprocessesonsoilmicrobialcommunityassemblyintemperategrasslands
AT wangzhiheng relativeimportanceofdeterministicandstochasticprocessesonsoilmicrobialcommunityassemblyintemperategrasslands