Heterogeneity of Microbial Communities on Deep-Sea Ferromanganese Crusts in the Takuyo-Daigo Seamount

• Kato Shingo

  Ore Genesis Research Unit, Project Team for Development of New-generation Research Protocol for Submarine Resources, Japan Agency for Marine-Earth Science and Technology (JAMSTEC) Research and Development Center for Submarine Resources, JAMSTEC

• Okumura Tomoyo

  Department of Subsurface Geobiological Analysis and Research, JAMSTEC Center for Advanced Marine Core Research, Kochi University

• Uematsu Katsuyuki

  Department of Marine & Earth Sciences, Marine Works Japan, Ltd.

• Hirai Miho

  Research and Development Center for Marine Biosciences, JAMSTEC

• Iijima Koichi

  Ore Genesis Research Unit, Project Team for Development of New-generation Research Protocol for Submarine Resources, Japan Agency for Marine-Earth Science and Technology (JAMSTEC) Research and Development Center for Submarine Resources, JAMSTEC

• Usui Akira

  Center for Advanced Marine Core Research, Kochi University

• Suzuki Katsuhiko

  Ore Genesis Research Unit, Project Team for Development of New-generation Research Protocol for Submarine Resources, Japan Agency for Marine-Earth Science and Technology (JAMSTEC) Research and Development Center for Submarine Resources, JAMSTEC

抄録

Rock outcrops of aged deep-sea seamounts are generally covered with Fe and Mn oxides, known as ferromanganese (Fe–Mn) crusts. Although the presence of microorganisms in Fe–Mn crusts has been reported, limited information is currently available on intra- and inter-variations in crust microbial communities. Therefore, we collected several Fe–Mn crusts in bathyal and abyssal zones (water depths of 1,150–5,520 m) in the Takuyo-Daigo Seamount in the northwestern Pacific, and examined microbial communities on the crusts using culture-independent molecular and microscopic analyses. Quantitative PCR showed that microbial cells were abundant (10⁶–10⁸ cells g⁻¹) on Fe–Mn crust surfaces through the water depths. A comparative 16S rRNA gene analysis revealed community differences among Fe–Mn crusts through the water depths, which may have been caused by changes in dissolved oxygen concentrations. Moreover, community differences were observed among positions within each Fe–Mn crust, and potentially depended on the availability of sinking particulate organic matter. Microscopic and elemental analyses of thin Fe–Mn crust sections revealed the accumulation of microbial cells accompanied by the depletion of Mn in valleys of bumpy crust surfaces. Our results suggest that heterogeneous and abundant microbial communities play a role in the biogeochemical cycling of Mn, in addition to C and N, on crusts and contribute to the extremely slow growth of Fe–Mn crusts.

収録刊行物

• Ｍｉｃｒｏｂｅｓ　ａｎｄ　ｅｎｖｉｒｏｎｍｅｎｔｓ

  Ｍｉｃｒｏｂｅｓ　ａｎｄ　ｅｎｖｉｒｏｎｍｅｎｔｓ 33 (4), 366-377, 2018

  日本微生物生態学会 / 日本土壌微生物学会 / Taiwan Society of Microbial Ecology / 植物微生物研究会 / 極限環境微生物学会

キーワード

• deep-sea ferromanganese crusts
• microbial community
• biogeochemical cycling
• 16S rRNA gene analysis

詳細情報

• CRID: 1390001288104948608
• NII論文ID: 130007553558
• NII書誌ID: AA11551577
• DOI: 10.1264/jsme2.me18090
• ISSN: 13474405
• ISSN: 13426311
• NDL書誌ID: 029413929
• PubMed: 30381615
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I029413929
• Web Site: https://www.jstage.jst.go.jp/article/jsme2/33/4/33_ME18090/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • PubMed
  • CiNii Articles
  • KAKEN
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