In situ measurement of dark carbon fixation at the deep-sea floor and its importances in the deep-sea benthic ecosystem
Project/Area Number |
24540504
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Research Category |
Grant-in-Aid for Scientific Research (C)
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Allocation Type | Multi-year Fund |
Section | 一般 |
Research Field |
Stratigraphy/Paleontology
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Research Institution | Japan Agency for Marine-Earth Science and Technology |
Principal Investigator |
NOMAKI Hidetaka 独立行政法人海洋研究開発機構, 生物地球化学研究分野, 主任研究員 (90435834)
|
Project Period (FY) |
2012-04-01 – 2015-03-31
|
Project Status |
Completed (Fiscal Year 2014)
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Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2013: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2012: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
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Keywords | 深海生態系 / 物質循環 / 炭酸固定 / 現場培養実験 / 同位体トレーサー |
Outline of Final Research Achievements |
We investigated on the importance of chemolithoautotrophic carbon production at the deep-sea floor by performing in situ incubation experiments. The measured carbon fixation rates varied greatly among experimental sites. The carbon fixation rates were not correlated with the abundances of some prokaryotes which are expected to contribute carbon fixation at the deep-sea floor. The highest carbon fixation rate measured at bathyal Sagami Bay corresponded to 1 to 2 % of phytodetritus input rate to the seafloor. Considering the fact that sinking organic matters in the deep-sea mostly consist of refractory organic matter, the organic matter produced by chemolithoautotrophic microbes plays substantial roles in the deep-sea benthic ecosystems at Sagami Bay.
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Report
(4 results)
Research Products
(16 results)
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[Journal Article] Nitrate uptake by foraminifera and use in conjunction with endobionts under anoxic conditions2014
Author(s)
Nomaki, H., Chikaraishi, Y., Tsuchiya, M., Toyofuku, T., Ohkouchi, N., Uematsu, K., Tame, A., Kitazato, H.
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Journal Title
Limnology & Oceanography
Volume: 59
Issue: 6
Pages: 1879-1888
DOI
Related Report
Peer Reviewed / Open Access / Acknowledgement Compliant
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[Journal Article] Nematode community composition in hydrothermal vent and adjacent non-vent fields around Myojin Knoll, a seamount on the Izu-Ogasawara Arc in the western North Pacific Ocean2014
Author(s)
Setoguchi, Y., Nomaki, H., Kitahashi, T., Watanabe, H., Inoue, K., Ogawa, NO, Shimanaga, M.
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Journal Title
Mar. Biol
Volume: (in press)
Issue: 8
Pages: 1775-1785
DOI
Related Report
Peer Reviewed
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