Characterization of particle-associated and free-living bacterial and archaeal communities along the water columns of the South China Sea

doi:10.5194/bg-18-113-2021

CORC > 深海科学与工程研究所 > 中国科学院深海科学与工程研究所 > 深海科学研究部 > 深海生物学研究室 > 海洋病毒与分子生物学研究组

	Characterization of particle-associated and free-living bacterial and archaeal communities along the water columns of the South China Sea
	Li, Jiangtao 5; Gu, Lingyuan 5; Bai, Shijie 1; Wang, Jie 4; Su, Lei 5; Wei, Bingbing 5; Zhang, Li 3; Fang, Jiasong 2,6,7
刊名	BIOGEOSCIENCES
	2021-01-08
卷号	18 期号:1 页码:113-133
ISSN号	1726-4170
DOI	10.5194/bg-18-113-2021
英文摘要	There is a growing recognition of the role of particle-attached (PA) and free-living (FL) microorganisms in marine carbon cycle. However, current understanding of PA and FL microbial communities is largely focused on those in the upper photic zone, and relatively fewer studies have focused on microbial communities of the deep ocean. Moreover, archaeal populations receive even less attention. In this study, we determined bacterial and archaeal community structures of both the PA and FL assemblages at different depths, from the surface to the bathypelagic zone along two water column profiles in the South China Sea. Our results suggest that environmental parameters including depth, seawater age, salinity, particulate organic carbon (POC), dissolved organic carbon (DOC), dissolved oxygen (DO) and silicate play a role in structuring these microbial communities. Generally, the PA microbial communities had relatively low abundance and diversity compared with the FL microbial communities at most depths. Further microbial community analysis revealed that PA and FL fractions generally accommodate significantly divergent microbial compositions at each depth. The PA bacterial communities mainly comprise members of Alphaproteobacteria and Gammaproteobacteria, together with some from Planctomycetes and Deltaproteobacteria, while the FL bacterial lineages are also mostly distributed within Alphaproteobacteria and Gammaproteobacteria, along with other abundant members chiefly from Actinobacteria, Cyanobacteria, Bacteroidetes, Marinimicrobia and Deltaproteobacteria. Moreover, there was an obvious shifting in the dominant PA and FL bacterial compositions along the depth profiles from the surface to the bathypelagic deep. By contrast, both PA and FL archaeal communities dominantly consisted of euryarchaeotal Marine Group II (MGII) and thaumarchaeotal Nitrosopumilales, together with variable amounts of Marine Group III (MGIII), Methanosarcinales, Marine Benthic Group A (MBG-A) and Woesearchaeota. However, the pronounced distinction of archaeal community compositions between PA and FL fractions was observed at a finer taxonomic level. A high proportion of overlap of microbial compositions between PA and FL fractions implies that most microorganisms are potentially generalists with PA and FL dual lifestyles for versatile metabolic flexibility. In addition, microbial distribution along the depth profile indicates a potential vertical connectivity between the surface-specific microbial lineages and those in the deep ocean, likely through microbial attachment to sinking particles.
资助项目	National Natural Science Foundation of China[41373071] ; National Natural Science Foundation of China[91951210] ; National Key R&D Program of China[2018YFC0310600]
WOS关键词	ATTACHED BACTERIA ; MEDITERRANEAN SEA ; RIBOSOMAL-RNA ; MARINE-SNOW ; HETEROTROPHIC BACTERIA ; ARCTIC-OCEAN ; DEEP-SEA ; BIOGEOCHEMICAL SIGNIFICANCE ; PHYLOGENETIC COMPOSITION ; MACKENZIE RIVER
WOS研究方向	Environmental Sciences & Ecology ; Geology
语种	英语
出版者	COPERNICUS GESELLSCHAFT MBH
WOS记录号	WOS:000608793600001
资助机构	National Natural Science Foundation of China ; National Key R&D Program of China
内容类型	期刊论文
源URL	[http://ir.idsse.ac.cn/handle/183446/8395]
专题	深海科学研究部_深海生物学研究室_海洋病毒与分子生物学研究组
通讯作者	Fang, Jiasong
作者单位	1.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya 572000, Peoples R China 2.Shanghai Ocean Univ, Shanghai Engn Res Ctr Hadal Sci & Technol, Shanghai 201306, Peoples R China 3.China Univ Geosci, Sch Earth Sci, Wuhan 430074, Peoples R China 4.Shanghai Ocean Univ, Coll Marine Sci, Shanghai 201306, Peoples R China 5.Tongji Univ, State Key Lab Marine Geol, Shanghai 200092, Peoples R China 6.Hawaii Pacific Univ, Dept Nat Sci, Kaneohe, HI 96744 USA 7.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Biol & Biotechnol, Qingdao 266237, Peoples R China
推荐引用方式 GB/T 7714	Li, Jiangtao,Gu, Lingyuan,Bai, Shijie,et al. Characterization of particle-associated and free-living bacterial and archaeal communities along the water columns of the South China Sea[J]. BIOGEOSCIENCES,2021,18(1):113-133.
APA	Li, Jiangtao.,Gu, Lingyuan.,Bai, Shijie.,Wang, Jie.,Su, Lei.,...&Fang, Jiasong.(2021).Characterization of particle-associated and free-living bacterial and archaeal communities along the water columns of the South China Sea.BIOGEOSCIENCES,18(1),113-133.
MLA	Li, Jiangtao,et al."Characterization of particle-associated and free-living bacterial and archaeal communities along the water columns of the South China Sea".BIOGEOSCIENCES 18.1(2021):113-133.