Distinct microbial communities thriving in gas hydrate-associated sediments from the eastern Japan Sea

Katsunori Yanagawa; Mariko Kouduka; Yuri Nakamura; Akihiro Hachikubo; Hitoshi Tomaru; Yohey Suzuki

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Distinct microbial communities thriving in gas hydrate-associated sediments from the eastern Japan Sea

机译：来自日本东部海域与天然气水合物相关的沉积物中形成的独特微生物群落

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Marine gas hydrate and cold-seep systems, which maintain a large amount of methane in the seabed, may critically impact the geochemical and ecological characteristics of the deep-sea sedimentary environment. However, it remains unclear whether marine sediments associated with gas hydrate harbor novel microbial communities that are distinct from those from typical marine sediments. In this study, microbial community structures thriving in sediments associated with and without gas hydrate in the eastern Japan Sea were characterized by 16S rRNA gene-based phylogenetic analyses. Uncultivated bacterial lineages of candidate division JS1 and a novel group NT-B2 were dominant in the sediments from gas hydrate-associated sites. Whereas, microbial populations from sites not associated with gas hydrate were mainly composed of Bacteroidetes, Nitrospirales, Chlamydiales, Chlorobiales, and yet-uncultured bacterial lineages of 0D1 and TM06. The good correlation between the dominance of JS1 and NT-B2 and the association of gas hydrate could be attributed to the supply of more energetically favorable energy sources in gas-rich fluids from the deep subsurface than refractory organic matter of terrigenous and diatomaceous origin.

机译：在海床中保留大量甲烷的海洋天然气水合物和冷深系统可能会严重影响深海沉积环境的地球化学和生态特征。但是，尚不清楚与天然气水合物相关的海洋沉积物是否具有不同于典型海洋沉积物的新型微生物群落。在这项研究中，通过基于16S rRNA基因的系统发育分析，对日本东海伴有和不伴有天然气水合物的沉积物中的微生物群落结构进行了研究。候选水合物JS1和一个新的NT-B2组的未培养细菌谱系在天然气水合物相关位点的沉积物中占主导地位。而与气体水合物无关的场所中的微生物种群主要由拟杆菌，硝化螺旋体，衣原体，绿藻以及尚未培养的细菌谱系0D1和TM06组成。 JS1和NT-B2的优势与天然气水合物之间的良好相关性可以归因于来自深地下的富含气体的流体比源于陆源和硅藻类的难熔有机质提供了更加有利的能源。

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来源
《Journal of Asian earth sciences》 |2014年第15期|243-249|共7页
作者
Katsunori Yanagawa; Mariko Kouduka; Yuri Nakamura; Akihiro Hachikubo; Hitoshi Tomaru; Yohey Suzuki;
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作者单位

Department of Earth and Planetary Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, Japan,Subsurface Geobiology Advanced Research (SUGAR) Project, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokosuka, Japan;

Department of Earth and Planetary Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, Japan;

Institute of Geology and Geoinformation, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Japan;

Kitami Institute of Technology, 165 Koen-cho, Kitami, Japan;

Department of Earth Sciences, Graduate School of Science, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba, Japan;

Department of Earth and Planetary Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, Japan;

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正文语种 eng
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关键词
Marine sediment; Gas hydrate; Japan Sea; Microbial community; 16S rRNA genes; JS1;

机译：海洋沉积物;天然气水合物;日本海微生物群落;16S rRNA基因;JS1;

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Distinct microbial communities thriving in gas hydrate-associated sediments from the eastern Japan Sea

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