Comparison of the microbial diversity in cold-seep sediments from different depths in the Nankai Trough

The Journal of General and Applied Microbiology

Shizuka Arakawa²  Chiaki Kato¹  Yasuhiko Yoshida²  Ron Usami²  Takako Sato¹ 

[1] Extremobiosphere Research Center, Japan Agency for Marine-Earth Science and Technology;Department of Applied Chemistry, Faculty of Engineering, Toyo University

关键词: accretionary prism;    Calyptogena communities;    cold-seep;    deep-sea;    microbial diversity;    Nankai Trough;    sulfur circulation;   

DOI  :  10.2323/jgam.52.47

学科分类：微生物学和免疫学

来源: Applied Microbiology, Molecular and Cellulrar Biosciences Research Foundation

【 摘 要 】

We have investigated the molecular phylogeny of cold-seep sediments obtained from the Nankai Trough, at depths of about 600, 2,000, and 3,300 m, and compared the microbial diversity profiles of those sediments samples. The γ-Proteobacteria that might function as sulfide oxidizers and the symbiotically related δ-Proteobacteria which might function as sulfate reducers were identified amongst the bacteria from all depths of the sediments. However, anoxic methane oxidizing archaea (ANME) and methanogens were only found in the 600 m deep sediments. These results indicated that the cold-seep microbial sulfur circulation system could be functioning in the shallow seep sediment at a depth of 600 m and the microbial activities at these sites might be more dynamic than at other deeper cold-seep sites.

【 授权许可】

Unknown