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Spatial variability of bacterial community compositions in the Mariana Trench

文献类型： 外文期刊

作者： Wang, Wei 1 ; Sun, Jingjing 1 ; Hao, Jianhua 1 ;

作者机构： 1.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, Key Lab Sustainable Dev Polar Fishery, Minist Agr & Rural Affairs, Qingdao 266071, Peoples R China

2.Pilot Natl Lab Marine Sci & Technol Qingdao, Lab Marine Drugs & Bioprod, Qingdao 266235, Peoples R China

关键词： hadal microbial community; marine bacterial diversity; deep-sea microbiology; Challenger Deep

期刊名称：CANADIAN JOURNAL OF MICROBIOLOGY （ 影响因子：3.226； 五年影响因子：2.731 ）

ISSN： 0008-4166

年卷期：

页码：

收录情况： SCI

摘要： Hadal microorganisms play an important role in the biogeochemical processes in marine ecosystems and act as a valuable re -source for industrial applications. This paper presents the bacterial community analysis of samples taken from the Challenger Deep within the Mariana Trench, which is the deepest site in the ocean. High-throughput 16S rRNA gene amplicon sequencing was used to reveal that the vertically sampled bacterial populations at eight stations varied at the surface to 10 km depth. The surface water samples harbored a distinct bacterial assemblage, while the mesopelagic and bathyal samples manifested different bacterial community composition, which was not consistent with previous studies. Gammaproteobacteria was the most abundant bacteria in the bathyal and hadal waters. The hadal bacterial community consisted mostly of Alteromonadales and Oceanospirillales. The former was widely spread in the water column, which might suggest habitat partitioning at the genus and operational taxonomic unit levels, while the latter might represent hadal-enriched hydrocarbon degraders. The present work complements the current knowledge and understanding of the bathyal and hadal bacterial communities of the Mariana Trench.

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