Unique pioneer microbial communities exposed to volcanic sulfur dioxide

Reiko Fujimura, Seok Won Kim, Yoshinori Sato, Kenshiro Oshima, Masahira Hattori, Takashi Kamijo, Hiroyuki Ohta

    Research output: Contribution to journalArticle

    4 Citations (Scopus)

    Abstract

    Newly exposed volcanic substrates contain negligible amounts of organic materials. Heterotrophic organisms in newly formed ecosystems require bioavailable carbon and nitrogen that are provided from CO2 and N2 fixation by pioneer microbes. However, the knowledge of initial ecosystem developmental mechanisms, especially the association between microbial succession and environmental change, is still limited. This study reports the unique process of microbial succession in fresh basaltic ash, which was affected by long-term exposure to volcanic sulfur dioxide (SO2). Here we compared the microbial ecosystems among deposits affected by SO2 exposure at different levels. The results of metagenomic analysis suggested the importance of autotrophic iron-oxidizing bacteria, particularly those involved in CO2 and N2 fixation, in the heavily SO2 affected site. Changes in the chemical properties of the deposits after the decline of the SO2 impact led to an apparent decrease in the iron-oxidizer abundance and a possible shift in the microbial community structure. Furthermore, the community structure of the deposits that had experienced lower SO2 gas levels showed higher similarity with that of the control forest soil. Our results implied that the effect of SO2 exposure exerted a selective pressure on the pioneer community structure by changing the surrounding environment of the microbes.

    Original languageEnglish
    Article number19687
    JournalScientific Reports
    Volume6
    DOIs
    Publication statusPublished - 2016 Jan 21

    Fingerprint

    Sulfur Dioxide
    Ecosystem
    Nitrogen Fixation
    Iron
    Metagenomics
    Nitrogen
    Soil
    Carbon
    Gases
    Bacteria

    ASJC Scopus subject areas

    • General

    Cite this

    Fujimura, R., Kim, S. W., Sato, Y., Oshima, K., Hattori, M., Kamijo, T., & Ohta, H. (2016). Unique pioneer microbial communities exposed to volcanic sulfur dioxide. Scientific Reports, 6, [19687]. https://doi.org/10.1038/srep19687

    Unique pioneer microbial communities exposed to volcanic sulfur dioxide. / Fujimura, Reiko; Kim, Seok Won; Sato, Yoshinori; Oshima, Kenshiro; Hattori, Masahira; Kamijo, Takashi; Ohta, Hiroyuki.

    In: Scientific Reports, Vol. 6, 19687, 21.01.2016.

    Research output: Contribution to journalArticle

    Fujimura, Reiko ; Kim, Seok Won ; Sato, Yoshinori ; Oshima, Kenshiro ; Hattori, Masahira ; Kamijo, Takashi ; Ohta, Hiroyuki. / Unique pioneer microbial communities exposed to volcanic sulfur dioxide. In: Scientific Reports. 2016 ; Vol. 6.
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