Stochastic Assembly Leads to Alternative Communities with Distinct Functions in a Bioreactor Microbial Community

ABSTRACT The processes and mechanisms of community assembly and its relationships to community functioning are central issues in ecology. Both deterministic and stochastic factors play important roles in shaping community composition and structure, but the connection between community assembly and e...

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Autores principales:	Jizhong Zhou, Wenzong Liu, Ye Deng, Yi-Huei Jiang, Kai Xue, Zhili He, Joy D. Van Nostrand, Liyou Wu, Yunfeng Yang, Aijie Wang
Formato:	article
Lenguaje:	EN
Publicado:	American Society for Microbiology 2013
Materias:	Microbiology QR1-502
Acceso en línea:	https://doaj.org/article/d92ab94436504d9fb6efcf48dca18315
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spelling	oai:doaj.org-article:d92ab94436504d9fb6efcf48dca183152021-11-15T15:40:29ZStochastic Assembly Leads to Alternative Communities with Distinct Functions in a Bioreactor Microbial Community10.1128/mBio.00584-122150-7511https://doaj.org/article/d92ab94436504d9fb6efcf48dca183152013-05-01T00:00:00Zhttps://journals.asm.org/doi/10.1128/mBio.00584-12https://doaj.org/toc/2150-7511ABSTRACT The processes and mechanisms of community assembly and its relationships to community functioning are central issues in ecology. Both deterministic and stochastic factors play important roles in shaping community composition and structure, but the connection between community assembly and ecosystem functioning remains elusive, especially in microbial communities. Here, we used microbial electrolysis cell reactors as a model system to examine the roles of stochastic assembly in determining microbial community structure and functions. Under identical environmental conditions with the same source community, ecological drift (i.e., initial stochastic colonization) and subsequent biotic interactions created dramatically different communities with little overlap among 14 identical reactors, indicating that stochastic assembly played dominant roles in determining microbial community structure. Neutral community modeling analysis revealed that deterministic factors also played significant roles in shaping microbial community structure in these reactors. Most importantly, the newly formed communities differed substantially in community functions (e.g., H2 production), which showed strong linkages to community structure. This study is the first to demonstrate that stochastic assembly plays a dominant role in determining not only community structure but also ecosystem functions. Elucidating the links among community assembly, biodiversity, and ecosystem functioning is critical to understanding ecosystem functioning, biodiversity preservation, and ecosystem management. IMPORTANCE Microorganisms are the most diverse group of life known on earth. Although it is well documented that microbial natural biodiversity is extremely high, it is not clear why such high diversity is generated and maintained. Numerous studies have established the roles of niche-based deterministic factors (e.g., pH, temperature, and salt) in shaping microbial biodiversity, the importance of stochastic processes in generating microbial biodiversity is rarely appreciated. Moreover, while microorganisms mediate many ecosystem processes, the relationship between microbial diversity and ecosystem functioning remains largely elusive. Using a well-controlled laboratory system, this study provides empirical support for the dominant role of stochastic assembly in creating variations of microbial diversity and the first explicit evidence for the critical role of community assembly in influencing ecosystem functioning. The results presented in this study represent important contributions to the understanding of the mechanisms, especially stochastic processes, involved in shaping microbial biodiversity.Jizhong ZhouWenzong LiuYe DengYi-Huei JiangKai XueZhili HeJoy D. Van NostrandLiyou WuYunfeng YangAijie WangAmerican Society for MicrobiologyarticleMicrobiologyQR1-502ENmBio, Vol 4, Iss 2 (2013)
institution	DOAJ
collection	DOAJ
language	EN
topic	Microbiology QR1-502
spellingShingle	Microbiology QR1-502 Jizhong Zhou Wenzong Liu Ye Deng Yi-Huei Jiang Kai Xue Zhili He Joy D. Van Nostrand Liyou Wu Yunfeng Yang Aijie Wang Stochastic Assembly Leads to Alternative Communities with Distinct Functions in a Bioreactor Microbial Community
description	ABSTRACT The processes and mechanisms of community assembly and its relationships to community functioning are central issues in ecology. Both deterministic and stochastic factors play important roles in shaping community composition and structure, but the connection between community assembly and ecosystem functioning remains elusive, especially in microbial communities. Here, we used microbial electrolysis cell reactors as a model system to examine the roles of stochastic assembly in determining microbial community structure and functions. Under identical environmental conditions with the same source community, ecological drift (i.e., initial stochastic colonization) and subsequent biotic interactions created dramatically different communities with little overlap among 14 identical reactors, indicating that stochastic assembly played dominant roles in determining microbial community structure. Neutral community modeling analysis revealed that deterministic factors also played significant roles in shaping microbial community structure in these reactors. Most importantly, the newly formed communities differed substantially in community functions (e.g., H2 production), which showed strong linkages to community structure. This study is the first to demonstrate that stochastic assembly plays a dominant role in determining not only community structure but also ecosystem functions. Elucidating the links among community assembly, biodiversity, and ecosystem functioning is critical to understanding ecosystem functioning, biodiversity preservation, and ecosystem management. IMPORTANCE Microorganisms are the most diverse group of life known on earth. Although it is well documented that microbial natural biodiversity is extremely high, it is not clear why such high diversity is generated and maintained. Numerous studies have established the roles of niche-based deterministic factors (e.g., pH, temperature, and salt) in shaping microbial biodiversity, the importance of stochastic processes in generating microbial biodiversity is rarely appreciated. Moreover, while microorganisms mediate many ecosystem processes, the relationship between microbial diversity and ecosystem functioning remains largely elusive. Using a well-controlled laboratory system, this study provides empirical support for the dominant role of stochastic assembly in creating variations of microbial diversity and the first explicit evidence for the critical role of community assembly in influencing ecosystem functioning. The results presented in this study represent important contributions to the understanding of the mechanisms, especially stochastic processes, involved in shaping microbial biodiversity.
format	article
author	Jizhong Zhou Wenzong Liu Ye Deng Yi-Huei Jiang Kai Xue Zhili He Joy D. Van Nostrand Liyou Wu Yunfeng Yang Aijie Wang
author_facet	Jizhong Zhou Wenzong Liu Ye Deng Yi-Huei Jiang Kai Xue Zhili He Joy D. Van Nostrand Liyou Wu Yunfeng Yang Aijie Wang
author_sort	Jizhong Zhou
title	Stochastic Assembly Leads to Alternative Communities with Distinct Functions in a Bioreactor Microbial Community
title_short	Stochastic Assembly Leads to Alternative Communities with Distinct Functions in a Bioreactor Microbial Community
title_full	Stochastic Assembly Leads to Alternative Communities with Distinct Functions in a Bioreactor Microbial Community
title_fullStr	Stochastic Assembly Leads to Alternative Communities with Distinct Functions in a Bioreactor Microbial Community
title_full_unstemmed	Stochastic Assembly Leads to Alternative Communities with Distinct Functions in a Bioreactor Microbial Community
title_sort	stochastic assembly leads to alternative communities with distinct functions in a bioreactor microbial community
publisher	American Society for Microbiology
publishDate	2013
url	https://doaj.org/article/d92ab94436504d9fb6efcf48dca18315
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_version_	1718427733737865216

Stochastic Assembly Leads to Alternative Communities with Distinct Functions in a Bioreactor Microbial Community

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