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

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Abstract

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. Copyright © 2006 by The Microbiology Research Foundation.

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Arakawa, S., Sato, T., Yoshida, Y., Usami, R., & Kato, C. (2006). Comparison of the microbial diversity in cold-seep sediments from different depths in the Nakai Trough. Journal of General and Applied Microbiology, 52(1), 47–54. https://doi.org/10.2323/jgam.52.47

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