Microbial community structures of methane hydrate-bearing sediments in the Ulleung Basin, East Sea of Korea
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Title
- Microbial community structures of methane hydrate-bearing sediments in the Ulleung Basin, East Sea of Korea
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Author(s)
- Lee, Jin-Woo; Kwon, Kae Kyoung; Azizi, Aqil; Oh, Hyun-Myung; Kim, Wonduck; Bahk, Jang-Jun; Lee, Dong-Hun; Lee, Jung-Hyun
- KIOST Author(s)
- Kwon, Kae Kyoung(권개경); Lee, Jung Hyun(이정현)
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Alternative Author(s)
- 이진우; 권개경; 오현명; 김원덕; 이정현
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Publication Year
- 2013-11
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Abstract
- Microbial communities of a methane hydrate-bearing deep sediment cores, collect from Site UBGH2-10 from the Ulleung-Basin (East Sea of Korea), were characterized by phylogenetic analysis on the basis of 16S rRNA gene cloning. Quantification of key functional genes related to sulfate reduction (dsrA) and methanogenesis (mcrA) and that of bacteria and archaea were conducted using molecular approaches. On the basis of geochemical data, four subsections were selected to compare the microbial diversity relative to the presence of methane hydrate. Marine benthic group B (MBGB) and candidate division JS1 (JS1) were the dominant taxa in the archaeal and bacterial libraries, respectively, throughout the core, except in the deep layer. Interestingly, ANME-1b members and mcrA were detected only in sulfate methane transition zone (SMTZ). However, the proportions of sulfate-reducing Deltaproteobacteria clones and dsrA copy numbers differed (i.e., a very low proportion of clones but a sufficiently high dsrA copy number relative to bacteria). These results suggests that anaerobic oxidation of methane may occur mainly in SMTZ of Ulleung Basin sediment, where it is performed by ANME-1b via an unidentified oxidization process. (C) 2013 Elsevier Ltd. All rights reserved.
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ISSN
- 0264-8172
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URI
- https://sciwatch.kiost.ac.kr/handle/2020.kiost/3066
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DOI
- 10.1016/j.marpetgeo.2013.06.002
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Bibliographic Citation
- MARINE AND PETROLEUM GEOLOGY, v.47, pp.136 - 146, 2013
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Publisher
- ELSEVIER SCI LTD
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Subject
- SULFATE-REDUCING BACTERIA; DEEP MARINE-SEDIMENTS; ANAEROBIC OXIDATION; SP-NOV.; GENE-SEQUENCES; SEEP SEDIMENTS; ARCHAEA; DIVERSITY; REPRESENT; ABUNDANCE
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Keywords
- Methane hydrate; Sulfate methane transition zone (SMTZ); ANME-1b; Marine benthic group B (MBGB); Candidate division JS1 (JS1); The Ulleung Basin
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Type
- Article
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Language
- English
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Document Type
- Article
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