The bacterial diversity and community composition altered in the oxygen minimum zone of the Tropical Western Pacific Ocean

doi:10.1007/s00343-021-0370-0

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	The bacterial diversity and community composition altered in the oxygen minimum zone of the Tropical Western Pacific Ocean
	Sun, Qiqi 1,2,3; Song, Jinming 2,3,4,5; Li, Xuegang 2,3,4,5; Yuan, Huamao 2,3,4,5; Wang, Qidong 2,3,4,5
刊名	JOURNAL OF OCEANOLOGY AND LIMNOLOGY
	2021-07-31
页码	15
关键词	bacterial diversity community composition oxygen minimum zones (OMZs) dissolved oxygen Tropical Western Pacific Ocean (TWPO)
ISSN号	2096-5508
DOI	10.1007/s00343-021-0370-0
通讯作者	Song, Jinming(jmsong@qdio.ac.cn) ; Li, Xuegang(lixuegang@qdio.ac.cn)
英文摘要	The oxygen minimum zones (OMZs) are globally expanding, yet the variation pattern of microbial communities related to dissolved oxygen levels remain unclear. Spatial variability of bacterial diversity and community composition (represented by 16S rRNA) of six stations was investigated within the water column in the seamount area of Tropical Western Pacific Ocean (TWPO) in May 2019. The seawater has dissolved oxygen (DO) concentration of 3.01-6.68 mg/L and the core of the oxygen minimum zones was located between the depths of 650 m and 1 750 m. The bacterial alpha-diversity showed unimodal pattern with the decreasing DO with depths and peaked in the upper oxycline (UO) of OMZs. The bacterial community structure of the mixed layer (ML) and the bottom layer clustered and separated from each other, while those of UO and the OMZ core (OM) clustered and overlapped. Overall, bacterial community composition transitioned from being Alphaproteobacteria and Gammaproteobacteria-dominant in ML to being Gammaproteobacteria and Nitrososphaeria/Deltaproteobacteria-dominant in UO and OM, and then changed to being Clostridia and unidentified_Actinobacteria-dominant in the bottom layer. Moreover, both bacterial alpha-diversity and the abundant classes fitted varying sectioned functions with DO. The DO solely explained 40.37% of the variation of bacterial community composition among layers (P<0.001). The predicted function profiling showed that the water column was predominant by chemoheterotrophy, cyanobacteria, and photoautotrophy in ML, by chemoheterotrophy and nitrate/sulfide cycling in UO and OM, and by chemoheterotrophy and fermentation in the bottom layer. Our findings revealed the DO-associated variation in bacterial diversity and community composition, and help to clarify the potential responses of microbes and their involved biogeochemical processes to the expansion and intensification of OMZs.
WOS研究方向	Marine & Freshwater Biology ; Oceanography
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000679762900001
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/175931]
专题	海洋研究所_海洋生态与环境科学重点实验室
通讯作者	Song, Jinming; Li, Xuegang
作者单位	1.Shandong Peanut Res Inst, Qingdao 266100, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Ecol & Environm Sci, Qingdao 266071, Peoples R China 3.Pilot Natl Lab Marine Sci & Technol, Lab Marine Ecol & Environm Sci, Qingdao 266071, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 5.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao 266071, Peoples R China
推荐引用方式 GB/T 7714	Sun, Qiqi,Song, Jinming,Li, Xuegang,et al. The bacterial diversity and community composition altered in the oxygen minimum zone of the Tropical Western Pacific Ocean[J]. JOURNAL OF OCEANOLOGY AND LIMNOLOGY,2021:15.
APA	Sun, Qiqi,Song, Jinming,Li, Xuegang,Yuan, Huamao,&Wang, Qidong.(2021).The bacterial diversity and community composition altered in the oxygen minimum zone of the Tropical Western Pacific Ocean.JOURNAL OF OCEANOLOGY AND LIMNOLOGY,15.
MLA	Sun, Qiqi,et al."The bacterial diversity and community composition altered in the oxygen minimum zone of the Tropical Western Pacific Ocean".JOURNAL OF OCEANOLOGY AND LIMNOLOGY (2021):15.