2012 Fiscal Year Final Research Report
Biogeochemical impact of TAIGA flux to deep sea environment
| Project Area | Project TAIGA: Trans-crustal Advection and In-situ biogeochemical processes of Global sub-seafloor Aquifer |
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| Project/Area Number |
20109003
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| Research Category |
Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
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| Allocation Type | Single-year Grants |
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| Review Section |
Science and Engineering
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| Research Institution | The University of Tokyo |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
YAMAMOTO Hiroyuki 海洋研究開発機構, 極限環境生物圏研究センター, 技術研究主幹 (30182645)
OKAMURA Kei 高知大学, 海洋コア総合研究センター, 准教授 (70324697)
FUKUBA Tatsuhiro 海洋研究開発機構, 海洋工学センター, 技術研究主任 (80401272)
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| Co-Investigator(Renkei-kenkyūsha) |
LINDSAY Dhugal 海洋研究開発機構, 極限環境生物圏研究センター, 技術研究主任 (80344282)
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| Project Period (FY) |
2008 – 2012
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| Keywords | 深海熱水プルーム / 深海環境 / 海洋生態 / 化学合成微生物 / 化学センサー / 自然環境モニタリング / 環境影響評価 |
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| Research Abstract |
To estimate the impacts of deep-sea hydrothermal activity (TAIGA), we quantified the chemical, biological, and ecological parameters of deep-sea hydrothermal plume in time and space. We developed in situ sensors, water sampler, and acoustic survey methods to observe the plume. These methods were applied at the 18 hydrothermal area using research vessels with AUV, ROV, submersible, or wired deep-tow. We found the strong positive correlation between microbial community structures and hydrothermal chemical compositions, which validate the evidence for ‘4 types of TAIGA hypothesis’. We developed the methods to measure the primary production of microbes in deep-sea and estimate the primary production rate in the plume. We found the evidence that the microbial primary production affected the zooplankton in deep sea by stable isotopic analysis.
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[Journal Article] Metabolically active microbial communities in marine sediment under high-CO2 and low-pH extremes2013
Author(s)
Yanagawa K, Morono Y, de Beer D, Haeckel M, Sunamura M, Futagami T, Hoshino T, Terada T, Nakamura K, Urabe T, Rehder G, Boetius A, Inagaki F
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Journal Title
ISME J
Volume: 7
Pages: 555-567
Peer Reviewed
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[Presentation] Microbiological production and ecological flux of northwestern subduction hydrothermal systems2012
Author(s)
Sunamura, M., Okamura, K., Noguchi, T., Yamamoto, H., Fukuba, T., & Yanagawa, K
Organizer
American Geophysical Union 2012 Fall Meeting
Place of Presentation
SanFrancisco, USA
Year and Date
2012-12-04
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