Microbial metabolism inferred from chemical and isotopic compositions of pore water around bananas discovered on the deep-sea floor in the Tenryu Submarine Canyon

DOI 機関リポジトリ Web Site 参考文献29件
  • Toki Tomohiro
    Marine Inorganic Chemistry Group, Department of Chemical Oceanography, Ocean Research Institute, The University of Tokyo
  • Kawamura Kiichiro
    Fukada Geological Institute
  • Tsunogai Urumu
    Earth and Planetary System Science, Faculty of Science, Hokkaido University
  • Gamo Toshitaka
    Marine Inorganic Chemistry Group, Department of Chemical Oceanography, Ocean Research Institute, The University of Tokyo

書誌事項

公開日
2017
資源種別
journal article
DOI
  • 10.5918/jamstecr.25.1
公開者
国立研究開発法人海洋研究開発機構

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説明

<p>We describe in detail the pore water chemistry in the sediments below a white mat around a bunch of bananas at a water depth of 2,200 m in the Tenryu Submarine Canyon. We infer the metabolism of microbes in the sediments around the bananas based on the chemical and isotopic compositions of the pore water. On the basis of the relation between ammonia and total carbonate (ΣCO2) concentrations in the pore water, we identified that an excess ΣCO2 was distributed around the bananas that cannot be explained by the decomposition of organic matter derived from marine organisms, indicating that the bananas decomposed to generate the excess ΣCO2. We conclude that the bananas built a local organic-rich environment, stimulating the activity of organotrophic bacteria.</p>

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