Analysis of Early Bacterial Communities on Volcanic Deposits on the Island of Miyake (Miyake-jima), Japan : a 6-year Study at a Fixed Site

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Microbial colonization on new terrestrial substrates represents the initiation of new soil ecosystem formation. In this study, we analyzed early bacterial communities growing on volcanic ash deposits derived from the 2000 Mount Oyama eruption on the island of Miyake (Miyake-jima), Japan. A site was established in an unvegetated area near the summit and investigated over a 6-year period from 2003 to 2009. Collected samples were acidic (pH 3.0-3.6), did not utilize any organic substrates in ECO microplate assays (Biolog), and harbored around 106 cells (g dry weight)<sup>-1</sup> of autotrophic Fe(II) oxidizers by most-probable-number (MPN) counts. <i>Acidithiobacillus ferrooxidans</i>, <i>Acidithiobacillus ferrivorans</i>, and the <i>Leptospirillum</i> groups I, II and III were found to be abundant in the deposits by clone library analysis of bacterial 16S rRNA genes. The numerical dominance of <i>Acidithiobacillus ferrooxidans</i> was also supported by analysis of the gene coding for the large subunit of the form I ribulose 1,5-bisphosphate carboxylase/oxygenase (RubisCO). Comparing the 16S rRNA gene clone libraries from samples differing in age, shifts in Fe(II)-oxidizing populations seemed to occur with deposit aging. The detection of known 16S rRNA gene sequences from Fe(III)-reducing acidophiles promoted us to propose the acidity-driven iron cycle for the early microbial ecosystem on the deposit.<br>

収録刊行物

  • Microbes and environments

    Microbes and environments 27(1), 19-29, 2012-03-01

    日本微生物生態学会・日本土壌微生物学会

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各種コード

  • NII論文ID(NAID)
    10030122581
  • NII書誌ID(NCID)
    AA11173196
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    13426311
  • NDL 記事登録ID
    023470059
  • NDL 請求記号
    Z54-J644
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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