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

Liu, Zongbao1,2; Wei, Qiaoyan3; Zou, Dayu1; Zhang, Siyu1; Zhang, Chuanlun4; Quan, Zhexue5; Li, Meng1,2

2022-08-01

10.1128/spectrum.01016-22

Microbiology Spectrum   影响因子和分区

2165-0497

["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.","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."]

estuarine ecosystem comammox diversity deterministic process salinity

SCI

英语

非南科大

National Natural Science Foundation of China["31800105","31970105","32061133009"] ; Innovation Team Project of Universities in Guangdong Province[2020KCXTD023] ; Shenzhen Science and Technology Program[JCYJ20200109105010363]

Microbiology

Microbiology

WOS:000835282700004

AMER SOC MICROBIOLOGY

Web of Science

1.Shenzhen Univ, Archaeal Biol Ctr, Inst Adv Study, Shenzhen, Guangdong, Peoples R China
2.Shenzhen Univ, Inst Adv Study, Shenzhen Key Lab Marine Microbiome Engn, Shenzhen, Guangdong, Peoples R China
3.Guilin Univ Elect Technol, Sch Life & Environm Sci, Guilin, Guangxi, Peoples R China
4.Southern Univ Sci & Technol, Shenzhen Key Lab Marine Archaea Geoomics, Shenzhen, Guangdong, Peoples R China
5.Fudan Univ, Sch Life Sci, Inst Biodivers Sci, Minist Educ,Key Lab Biodivers Sci & Ecol Engn, Shanghai, Peoples R China

Liu, Zongbao,Wei, Qiaoyan,Zou, Dayu,et al. Deterministic Factors Determine the Comammox Community Composition in the Pearl River Estuary Ecosystem[J]. Microbiology Spectrum,2022.

Liu, Zongbao.,Wei, Qiaoyan.,Zou, Dayu.,Zhang, Siyu.,Zhang, Chuanlun.,...&Li, Meng.(2022).Deterministic Factors Determine the Comammox Community Composition in the Pearl River Estuary Ecosystem.Microbiology Spectrum.

Liu, Zongbao,et al."Deterministic Factors Determine the Comammox Community Composition in the Pearl River Estuary Ecosystem".Microbiology Spectrum (2022).