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

	The bacterial diversity and community composition altered in the oxygen minimum zone of the Tropical Western Pacific Ocean
	Sun, Qiqi 1,2,3; Song, Jinming2,3,4,5 ; Li, Xuegang 2,3,4,5; Yuan, Huamao 2,3,4,5; Wang, Qidong2,3,4,5
	2021-07-31
发表期刊	JOURNAL OF OCEANOLOGY AND LIMNOLOGY
ISSN	2096-5508
页码	15
通讯作者	Song, Jinming(jmsong@qdio.ac.cn) ; Li, Xuegang(lixuegang@qdio.ac.cn)
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.
关键词	bacterial diversity community composition oxygen minimum zones (OMZs) dissolved oxygen Tropical Western Pacific Ocean (TWPO)
DOI	10.1007/s00343-021-0370-0
收录类别	SCI
语种	英语
WOS研究方向	Marine & Freshwater Biology ; Oceanography
WOS类目	Limnology ; Oceanography
WOS记录号	WOS:000679762900001
出版者	SCIENCE PRESS
引用统计	被引频次：7[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/175932
专题	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
第一作者单位	中国科学院海洋研究所
通讯作者单位	中国科学院海洋研究所
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.

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