The vertical distribution of prokaryotes in the surface sediment of Jiaolong cold seep at the northern South China Sea

被引:26
作者
Wu, Yuzhi [1 ,2 ]
Qiu, Jian-Wen [3 ]
Qian, Pei-Yuan [4 ]
Wang, Yong [1 ]
机构
[1] Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya, Hainan, Peoples R China
[2] Univ Chinese Acad Sci, Beijing, Peoples R China
[3] Hong Kong Baptist Univ, Dept Biol, Kowloon, Hong Kong, Peoples R China
[4] Hong Kong Univ Sci & Technol, Div Life Sci, Clear Water Bay, Hong Kong, Peoples R China
基金
美国国家科学基金会;
关键词
ANME; SRB; Cold seep; Metagenome; South China Sea; SULFATE-REDUCING BACTERIA; METHANE-OXIDIZING ARCHAEA; MOSBY MUD VOLCANO; SULFURIMONAS-DENITRIFICANS; METHANOTROPHIC ARCHAEA; PHYLOGENETIC ANALYSIS; MICROBIAL DIVERSITY; ANAEROBIC OXIDATION; EMENDED DESCRIPTION; MARINE-SEDIMENTS;
D O I
10.1007/s00792-018-1012-0
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
In deep-sea cold seeps, microbial communities are shaped by geochemical components in seepage solutions. In the present study, we report the composition of microbial communities and potential metabolic activities in the surface sediment of Jiaolong cold seep at the northern South China Sea. Pyrosequencing of 16S rRNA gene amplicons revealed that a majority of the microbial inhabitants of the surface layers (0-6 cm) were sulfur oxidizer bacteria Sulfurimonas and archaeal methane consumer ANME-1, while sulfate reducer bacteria SEEP-SRB1, ANME-1 and ANME-2 dominated the bottom layers (8-14 cm). The potential ecological roles of the microorganisms were further supported by the presence of functional genes for methane oxidation, sulfur oxidation, sulfur reduction and nitrate reduction in the metagenomes. Metagenomic analysis revealed a significant correlation between coverage of 16S rRNA gene of sulfur oxidizer bacteria, functional genes involved in sulfur oxidation and nitrate reduction in different layers, indicating that sulfur oxidizing may be coupled to nitrate reducing at the surface layers of Jiaolong seeping site. This is probably related to the sulfur oxidizers of Sulfurimonas and Sulfurovum, which may be the capacity of nitrate reduction or associated with unidentified syntrophic nitrate-reducing microbes in the surface of the cold seep.
引用
收藏
页码:499 / 510
页数:12
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