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Microbial diversity in the sediments of the southern Mariana Trench

  • Yingjie Li
  • Wenrui Cao
  • Yan Wang
  • Qingjun MaEmail author
Article
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Abstract

Microbial diversity in the abyssal sediments beneath the seafloor of 30, 94, and 151 cm near the southern end of the Mariana Trench was analyzed in the Illumina HiSeq 2500 platform. Results show that the microbial populations were dominated by bacteria but merely no archaea were identified at the three depths. In the bacterial community, Proteobacteria and Firmicutes dominated the total taxon tags, followed by Bacteroidetes, Actinobacteria, Planctomycetes, Cyanobacteria, and Chloroflexi, which together account for over 99% of the total population. Similar to that in the seawater in the trench, the operational taxonomic units (OTUs) belonging to Gammaproteobacteria from the sediment samples showed high abundance. However, common bacterial OTUs in the water of the trench including Nitrospirae and Marinimicrobia were hardly found in the sediments from the southern Mariana Trench or the hadal region. Therefore, this study documented for the first time the compositions of microbial diversity in the trench sediments, revealed the difference in microbial diversity in water and sediment of the trench and will enrich the knowledge on the microbial diversity in the abyssal areas.

Keyword

Mariana Trench microbial diversity high–throughput sequencing technology 

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Notes

Acknowledgment

We thank Prof. TIAN Jiwei and Prof. LIU Yanguang for providing the sediment samples.

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Copyright information

© Chinese Society for Oceanology and Limnology, Science Press and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Yingjie Li
    • 1
    • 2
  • Wenrui Cao
    • 3
  • Yan Wang
    • 1
    • 2
    • 4
  • Qingjun Ma
    • 1
    • 2
    • 5
    Email author
  1. 1.Key Laboratory of Experimental Marine Biology, Institute of OceanologyChinese Academy of SciencesQingdaoChina
  2. 2.Laboratory for Marine Biology and BiotechnologyQingdao National Laboratory for Marine Science and TechnologyQingdaoChina
  3. 3.Key Laboratory of Marine Geology and Environment, Institute of OceanologyChinese Academy of SciencesQingdaoChina
  4. 4.University of Chinese Academy of SciencesBeijingChina
  5. 5.Center for Ocean Mega–ScienceChinese Academy of SciencesQingdaoChina

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