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- Title
The vertical distribution of prokaryotes in the surface sediment of Jiaolong cold seep at the northern South China Sea.
- Authors
Wu, Yuzhi; Qiu, Jian-Wen; Qian, Pei-Yuan; Wang, Yong
- Abstract
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 <italic>Sulfurimonas</italic> 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 <italic>Sulfurimonas</italic> and <italic>Sulfurovum</italic>, which may be the capacity of nitrate reduction or associated with unidentified syntrophic nitrate-reducing microbes in the surface of the cold seep.
- Subjects
SOUTH China Sea; VERTICAL distribution (Aquatic biology); PROKARYOTES; MARINE sediments; MICROBIAL communities; RIBOSOMAL RNA; SULFATE-reducing bacteria
- Publication
Extremophiles, 2018, Vol 22, Issue 3, p499
- ISSN
1431-0651
- Publication type
Article
- DOI
10.1007/s00792-018-1012-0