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Genomic variation in microbial populations inhabiting the marine subseafloor at deep-sea hydrothermal vents

Author

Listed:
  • Rika E. Anderson

    (Josephine Bay Paul Center, Marine Biological Laboratory
    Carleton College)

  • Julie Reveillaud

    (Josephine Bay Paul Center, Marine Biological Laboratory
    Cirad UMR 117, Inra UMR 1309 ASTRE)

  • Emily Reddington

    (Josephine Bay Paul Center, Marine Biological Laboratory
    Great Pond Foundation)

  • Tom O. Delmont

    (Josephine Bay Paul Center, Marine Biological Laboratory
    University of Chicago)

  • A. Murat Eren

    (Josephine Bay Paul Center, Marine Biological Laboratory
    University of Chicago)

  • Jill M. McDermott

    (Woods Hole Oceanographic Institution
    Lehigh University)

  • Jeff S. Seewald

    (Woods Hole Oceanographic Institution)

  • Julie A. Huber

    (Josephine Bay Paul Center, Marine Biological Laboratory
    Woods Hole Oceanographic Institution)

Abstract

Little is known about evolutionary drivers of microbial populations in the warm subseafloor of deep-sea hydrothermal vents. Here we reconstruct 73 metagenome-assembled genomes (MAGs) from two geochemically distinct vent fields in the Mid-Cayman Rise to investigate patterns of genomic variation within subseafloor populations. Low-abundance populations with high intra-population diversity coexist alongside high-abundance populations with low genomic diversity, with taxonomic differences in patterns of genomic variation between the mafic Piccard and ultramafic Von Damm vent fields. Populations from Piccard are significantly enriched in nonsynonymous mutations, suggesting stronger purifying selection in Von Damm relative to Piccard. Comparison of nine Sulfurovum MAGs reveals two high-coverage, low-diversity MAGs from Piccard enriched in unique genes related to the cellular membrane, suggesting these populations were subject to distinct evolutionary pressures that may correlate with genes related to nutrient uptake, biofilm formation, or viral invasion. These results are consistent with distinct evolutionary histories between geochemically different vent fields, with implications for understanding evolutionary processes in subseafloor microbial populations.

Suggested Citation

  • Rika E. Anderson & Julie Reveillaud & Emily Reddington & Tom O. Delmont & A. Murat Eren & Jill M. McDermott & Jeff S. Seewald & Julie A. Huber, 2017. "Genomic variation in microbial populations inhabiting the marine subseafloor at deep-sea hydrothermal vents," Nature Communications, Nature, vol. 8(1), pages 1-11, December.
  • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_s41467-017-01228-6
    DOI: 10.1038/s41467-017-01228-6
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    Cited by:

    1. Xiyang Dong & Yongyi Peng & Muhua Wang & Laura Woods & Wenxue Wu & Yong Wang & Xi Xiao & Jiwei Li & Kuntong Jia & Chris Greening & Zongze Shao & Casey R. J. Hubert, 2023. "Evolutionary ecology of microbial populations inhabiting deep sea sediments associated with cold seeps," Nature Communications, Nature, vol. 14(1), pages 1-13, December.

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