地下熱水系における微生物地球化学 : 菱刈金山地下熱水系の研究例

• 西澤 学

  独立行政法人海洋研究開発機構プレカンブリアンエコシステムラボ

書誌事項

タイトル別名

• Biogeochemistry of subsurface geothermal water system in the Hishikari gold mine
• チカ ネッスイケイ ニ オケル ビセイブツ チキュウ カガク ヒシカリ キンザン チカ ネッスイケイ ノ ケンキュウレイ

抄録

This paper reviews biogeochemistry of subsurface geothermal water stream in the Hishikari gold mine, Japan. The stream, which is derived from a subsurface anaerobic aquifer containing plentiful CO₂, CH₄, H₂, and NH₄⁺, emerges in a mine tunnel 320 m below the ground level, providing nutrients for a lush microbial community that extends to a distance of approximately 7 m in the absence of sunlight-irradiation. Based on the analysis of 16S rRNA genes amplified from environmental DNA, change of microbial community along the stream was detected. In the hot upper stream (69°C), the dominant bacterial phylotypes were methane-oxidizing γ-Proteobacteria, and hydrogen- and sulfur-oxidizing Sulfurihydrogenibium sp. In contrast, the dominant bacterial phylotypes in the middle and lower stream (62 and 55°C) were closely related to ammonia-oxidizing Nitrosomonas and nitrite-oxidizing Nitrospira spp. Changes in the microbial metabolic potential estimated by quantitative PCR analysis of functional genes encoding the particulate methane monooxygenase (pmoA), ammonia monooxygenase (amoA), and putative nitrite oxidoreductase (nxrB), supported the community shift suggested by the 16S rRNA gene analysis. Decreasing CH₄, H₂ and NH₄⁺ contents and increasing NO₂^- and NO₃^- contents in the mat-interstitial water along the stream were consistent with the observed transition of the bacterial community structure in the stream.

収録刊行物

• 地球化学

  地球化学 44 (4), 127-136, 2010

  一般社団法人日本地球化学会

キーワード

• subsurface hot spring
• microbiology
• energy metabolism community shift

詳細情報

• CRID: 1390001205741839488
• NII論文ID: 110009327691
• NII書誌ID: AN00141280
• DOI: 10.14934/chikyukagaku.44.127
• ISSN: 21885923
• ISSN: 03864073
• NDL書誌ID: 10976338
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I10976338
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可