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Deterministic Factors Determine the Comammox Community Composition in the Pearl River Estuary Ecosystem

Complete ammonia oxidizers (comammox) have been widely detected in riverine and estuarine ecosystems. However, knowledge about the process of comammox community assembly from freshwater to marine environments is still limited. Here, based on deep sequencing, we investigated the community composition...

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Autores principales: Liu, Zongbao, Wei, Qiaoyan, Zou, Dayu, Zhang, Siyu, Zhang, Chuanlun, Quan, Zhexue, Li, Meng
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Society for Microbiology 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9431512/
https://www.ncbi.nlm.nih.gov/pubmed/35913204
http://dx.doi.org/10.1128/spectrum.01016-22
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author Liu, Zongbao
Wei, Qiaoyan
Zou, Dayu
Zhang, Siyu
Zhang, Chuanlun
Quan, Zhexue
Li, Meng
author_facet Liu, Zongbao
Wei, Qiaoyan
Zou, Dayu
Zhang, Siyu
Zhang, Chuanlun
Quan, Zhexue
Li, Meng
author_sort Liu, Zongbao
collection PubMed
description Complete ammonia oxidizers (comammox) have been widely detected in riverine and estuarine ecosystems. However, knowledge about the process of comammox community assembly from freshwater to marine environments is still limited. Here, based on deep sequencing, we investigated the community composition of comammox along a salinity gradient in the Pearl River Estuary (PRE), South China. Our results showed that comammox microorganisms in the PRE sediments were extremely diverse and displayed distinct distributional patterns between upstream and downstream habitats. Quantitative PCR demonstrated that comammox was the dominant ammonia-oxidizing microorganism (AOM) in the PRE upstream sediments, and ammonia-oxidizing archaea (AOA) dominated the PRE downstream sediments, while ammonia-oxidizing bacteria (AOB) were not dominant in any section of the PRE. Neutral modeling revealed that stochastic processes explained a limited part of the variation in the comammox community. The majority of beta nearest-taxon index values were higher than 2, indicating that comammox community assembly in the PRE sediments was better explained through a deterministic process than through a stochastic process. Salinity and total nitrogen were the most important contributing factors that shaped the comammox community. This study expanded the current knowledge of the diversity and niche preference of comammox in the estuarine ecosystem, and further enhances our understanding of the assembly of comammox community from freshwater to marine environments. IMPORTANCE Microbial communities are shaped by stochastic (emigration, immigration, birth, death, and genetic drift of species) and deterministic (e.g., environmental factors) processes. However, it remains unknown as to which type of process is more important in influencing the comammox community assembly from freshwater to marine environments. In this study, we compared the relative importance of stochastic and deterministic processes in shaping the assembly of the comammox community, which demonstrated that the deterministic process was more important in determining the community assembly patterns in the PRE ecosystem.
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spelling pubmed-94315122022-09-01 Deterministic Factors Determine the Comammox Community Composition in the Pearl River Estuary Ecosystem Liu, Zongbao Wei, Qiaoyan Zou, Dayu Zhang, Siyu Zhang, Chuanlun Quan, Zhexue Li, Meng Microbiol Spectr Research Article Complete ammonia oxidizers (comammox) have been widely detected in riverine and estuarine ecosystems. However, knowledge about the process of comammox community assembly from freshwater to marine environments is still limited. Here, based on deep sequencing, we investigated the community composition of comammox along a salinity gradient in the Pearl River Estuary (PRE), South China. Our results showed that comammox microorganisms in the PRE sediments were extremely diverse and displayed distinct distributional patterns between upstream and downstream habitats. Quantitative PCR demonstrated that comammox was the dominant ammonia-oxidizing microorganism (AOM) in the PRE upstream sediments, and ammonia-oxidizing archaea (AOA) dominated the PRE downstream sediments, while ammonia-oxidizing bacteria (AOB) were not dominant in any section of the PRE. Neutral modeling revealed that stochastic processes explained a limited part of the variation in the comammox community. The majority of beta nearest-taxon index values were higher than 2, indicating that comammox community assembly in the PRE sediments was better explained through a deterministic process than through a stochastic process. Salinity and total nitrogen were the most important contributing factors that shaped the comammox community. This study expanded the current knowledge of the diversity and niche preference of comammox in the estuarine ecosystem, and further enhances our understanding of the assembly of comammox community from freshwater to marine environments. IMPORTANCE Microbial communities are shaped by stochastic (emigration, immigration, birth, death, and genetic drift of species) and deterministic (e.g., environmental factors) processes. However, it remains unknown as to which type of process is more important in influencing the comammox community assembly from freshwater to marine environments. In this study, we compared the relative importance of stochastic and deterministic processes in shaping the assembly of the comammox community, which demonstrated that the deterministic process was more important in determining the community assembly patterns in the PRE ecosystem. American Society for Microbiology 2022-08-01 /pmc/articles/PMC9431512/ /pubmed/35913204 http://dx.doi.org/10.1128/spectrum.01016-22 Text en Copyright © 2022 Liu et al. https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution 4.0 International license (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Research Article
Liu, Zongbao
Wei, Qiaoyan
Zou, Dayu
Zhang, Siyu
Zhang, Chuanlun
Quan, Zhexue
Li, Meng
Deterministic Factors Determine the Comammox Community Composition in the Pearl River Estuary Ecosystem
title Deterministic Factors Determine the Comammox Community Composition in the Pearl River Estuary Ecosystem
title_full Deterministic Factors Determine the Comammox Community Composition in the Pearl River Estuary Ecosystem
title_fullStr Deterministic Factors Determine the Comammox Community Composition in the Pearl River Estuary Ecosystem
title_full_unstemmed Deterministic Factors Determine the Comammox Community Composition in the Pearl River Estuary Ecosystem
title_short Deterministic Factors Determine the Comammox Community Composition in the Pearl River Estuary Ecosystem
title_sort deterministic factors determine the comammox community composition in the pearl river estuary ecosystem
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9431512/
https://www.ncbi.nlm.nih.gov/pubmed/35913204
http://dx.doi.org/10.1128/spectrum.01016-22
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