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Li Tao,Wang Peng. 2014. Bacterial diversity in sediments of core MD05-2902 from the Xisha Trough, the South China Sea. Acta Oceanologica Sinica, 33(10):85-93
Bacterial diversity in sediments of core MD05-2902 from the Xisha Trough, the South China Sea
南海西沙海槽沉积物柱MD05-2902细菌多样性
Received:June 06, 2014  Revised:October 01, 2013
DOI:10.1007/s13131-014-0543-1
Key words:Xisha Trough  bacterial diversity  16S rRNA gene
中文关键词:  西沙海槽  细菌多样性  16S rRNA基因
基金项目:The Key Project of China National Programs for Fundamental Research and Development under contract No. 2007CB815904; the National Natural Science Foundation of China under contract No. 41276125; the South China Sea-Deep Program of the National Science Foundation of China under contract No. 91028005; the State Key Laboratory of Marine Geology, Tongji University under contract No. MGK 120202.
Author NameAffiliationE-mail
Li Tao State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092, China
Guangzhou Marine Geological Survey, Guangzhou 510760, China 
 
Wang Peng State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092, China pengwang@tongji.edu.cn 
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Abstract:
      A sediment core MD05-2902 was collected from the deep-sea basin of the Xisha Trough. The vertical distribution and diversity of bacteria in the core was investigated through ten sub-sampling with an interval of 1 m using bacterial 16S rRNA gene as a phylogenetic bio-marker. Eighteen phylogenetic groups were identified from 16S rRNA gene clone libraries. The dominant bacterial groups were JS1, Planctomycetes and Chloroflexi, which accounted for 30.6%, 16.6%, and 15.6% of bacterial clones in the libraries, respectively. In order to reveal the relationship between biotic and abiotic data, a nonmetric multidimensional scaling analysis was performed. The result revealed that the δ15N, δ13C, total organic carbon and total organic nitrogen possibly influenced the bacterial community structure. This study expanded our knowledge of the biogeochemical cycling in the Xisha Trough sediment.
中文摘要:
      对采自西沙海槽深海盆地一沉积物柱MD05-2902中的细菌多样性和垂向分布特征进行研究。利用细菌16S rRNA基因对沉积物柱中的10个微生物样品(1m等间距采样)进行系统发育分析。16S rDNA系列分别来自18个细菌类群,以JS1、浮霉菌(Planctomycetes)和屈桡杆菌(Chloroflexi)为优势类群。这三个类群分别占全部序列的30.6%、16.6%和15.6%。使用多维尺度分析方法(nonmetric multidimensional scaling analysis)揭示微生物群落与环境因子之间的关系,结果表明δ15N、δ13C、总有机碳和总有机氮可能影响了细菌群落结构。该研究有助于了解西沙海槽沉积物中的生物地球化学循环。
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