XU Henglong, ZHU Mingzhuang, JIANG Yong, AL-RASHEID Khaled A S. Temporal species distributions of planktonic protist communities in semi-enclosed mariculture waters and responses to environmental stress[J]. Acta Oceanologica Sinica, 2010, (3): 74-83. doi: 10.1007/s13131-010-0038-7
Citation: WEI Manman, ZHANG Rubing, WANG Yuguang, JI Houguo, ZHENG Jia, CHEN Xinhua, ZHOU Hongbo. Microbial community structure and diversity in deep-sea hydrothermal vent sediments along the Eastern Lau Spreading Centre[J]. Acta Oceanologica Sinica, 2013, 32(2): 42-51. doi: 10.1007/s13131-013-0276-6

Microbial community structure and diversity in deep-sea hydrothermal vent sediments along the Eastern Lau Spreading Centre

doi: 10.1007/s13131-013-0276-6
  • Received Date: 2011-05-19
  • Rev Recd Date: 2012-04-24
  • The aim of this study is to investigate microbial structures and diversities in five active hydrothermal fields' sediments along the Eastern Lau Spreading Centre (ELSC) in the Lau Basin (southwest Pacific). Microbial communities were surveyed by denatured gradient gel electrophoresis (DGGE) and clone library analysis of 16S rRNA genes. The differences in microbial community structures among sediment samples from the five deep-sea hydrothermal sites were revealed by DGGE profiles. Cluster analysis of DGGE profiles separated the five hydrothermal samples into two groups. Four different 16S rRNA gene clone libraries, representing two selected hydrothermal samples (19-4TVG8 and 19-4TVG11), were constructed. Twenty-three and 32 phylotypes were identified from 166 and 160 bacterial clones respectively, including Proteobacteria, Bacteroidetes, Firmicutes, Nitrospirae and Planctomycetes. The phylum Proteobacteria is dominant in both bacterial libraries with a predominance of Gamma-Proteobacteria. A total of 31 and 25 phylotypes were obtained from 160 and 130 archaeal clones respectively, including Miscellaneous Crenarchaeotic Group, Marine Group I and Ⅲ, Marine Benthic Group E, Terrestrial Hot Spring Crenarchaeota and Deep-sea Hydrothermal Vent Euryarchaeota. These results show a variety of clones related to those involved in sulfur cycling, suggesting that the cycling and utilization of sulfur compounds may extensively occur in the Lau Basin deep-sea hydrothermal ecosystem.
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