Microbial communities in semi-consolidated carbonate sediments of the Southwest Indian Ridge

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• 作者：Jiwei Li (1) (2)
  Xiaotong Peng (1) (3)
  Huaiyang Zhou (3)
  Jiangtao Li (3)
  Zhilei Sun (4)
  Shun Chen (3)
  
• 关键词：carbonate sediments ; ferromanganese oxides ; prokaryotic communities ; biodiversity ; metabolic process
• 刊名：Journal of Microbiology
• 出版年：2014
• 出版时间：February 2014
• 年：2014
• 卷：52
• 期：2
• 页码：111-119
• 全文大小：537 KB
• 作者单位：Jiwei Li (1) (2)
  Xiaotong Peng (1) (3)
  Huaiyang Zhou (3)
  Jiangtao Li (3)
  Zhilei Sun (4)
  Shun Chen (3)
  
  1. Sanya Institute of Deep-sea Science and Engineering, Chinese Academy of Sciences, Sanya, 572000, P. R. China
  2. Southwest Jiaotong University, Chengdu, 610031, P. R. China
  3. State Key Laboratory of Marine Geology, Tongji University, Shanghai, 200092, P. R. China
  4. Qingdao Institute of Marine Geology, Qingdao, 266071, P. R. China
  
• ISSN：1976-3794

文摘

White semi-consolidated carbonate sediments attached to black ferromanganese oxide films were collected approximately 50 km west of a newly discovered hydrothermal field near the Southwest Indian Ridge (SWIR). The biodiversity of the prokaryotic communities within the field was examined using clone library-based culture-independent analysis of the exterior black oxides and the interior white carbonates. Subsequent 16S rRNA gene analysis suggested that Gamma-proteobacteria, Acidobacteria, and Thaumarchaeota members dominated the bacterial and archaeal clone libraries. To further characterize the metabolic processes within the microbial community, analyses of the amoA (coding the alpha subunit of the ammonia monooxygenase for Archaea) and aprA (coding the alpha subunit of the dissimilatory adenosine-5-phosphosulfate reductase for the sulfate-reducing and sulfur-oxidizing prokaryotes) functional genes were conducted. The functional gene analysis results suggested that Thaumarchaeota and Alphaproteobacteria members were the potential players that participated in N and S cycles in this marine carbonate sedimentary environment. This paper is the first to describe the microbial communities and their potential metabolic pathways within the semi-consolidated carbonate sediments of the SWIR.