Integrating Stochastic and Deterministic Process in the Biogeography of N2-Fixing Cyanobacterium Candidatus Atelocyanobacterium Thalassa
文献类型： 外文期刊
作者： Li, Liuyang 1 ; Wu, Chao 3 ; Huang, Danyue 1 ; Ding, Changling 3 ; Wei, Yuqiu 6 ; Sun, Jun 1 ;
作者机构： 1.China Univ Geosci, Coll Marine Sci & Technol, Wuhan, Peoples R China
2.Shanghai Jiao Tong Univ, Sch Life Sci & Biotechnol, State Key Lab Microbial Metab, Shanghai, Peoples R China
3.Tianjin Univ Sci & Technol, Res Ctr Indian Ocean Ecosyst, Tianjin, Peoples R China
4.Shanghai Jiao Tong Univ, Sch Oceanog, Shanghai, Peoples R China
5.Tianjin Univ Sci & Technol, Coll Biotechnol, Tianjin, Peoples R China
6.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, Key Lab Sustainable Dev Marine Fisheries, Minist Agr & Rural Affairs, Qingdao, Peoples R China
关键词： cyanobacteria; nifH; UCYN-A; community assembly; stochasticity; determinism; temperature
期刊名称：FRONTIERS IN MICROBIOLOGY （ 影响因子：5.2； 五年影响因子：6.2 ）
ISSN：
年卷期： 2021 年 12 卷
页码：
收录情况： SCI
摘要： UCYN-A is one of the most widespread and important marine diazotrophs. Its unusual distribution in both cold/warm and coastal/oceanic waters challenges current understanding about what drives the biogeography of diazotrophs. This study assessed the community assembly processes of the nitrogen-fixing cyanobacterium UCYN-A, developing a framework of assembly processes underpinning the microbial biogeography and diversity. High-throughput sequencing and a qPCR approach targeting the nifH gene were used to investigate three tropical seas: the Bay of Bengal, the Western Pacific Ocean, and the South China Sea. Based on the neutral community model and two types of null models calculating the b-nearest taxon index and the normalized stochasticity ratio, we found that stochastic assembly processes could explain 66-92% of the community assembly; thus, they exert overwhelming influence on UCYN-A biogeography and diversity. Among the deterministic processes, temperature and coastal/oceanic position appeared to be the principal environmental factors driving UCYN-A diversity. In addition, a close linkage between assembly processes and UCYNA abundance/diversity/drivers can provide clues for the unusual global distribution of UCYN-A.
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