The role of vacuoles on the adaptive ecology of benthic foraminifera in dysoxic sediments
| Project/Area Number |
17K05697
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Stratigraphy/Paleontology
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| Research Institution | Japan Agency for Marine-Earth Science and Technology |
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Principal Investigator |
NOMAKI Hidetaka 国立研究開発法人海洋研究開発機構, 超先鋭研究開発部門(超先鋭研究プログラム), 主任研究員 (90435834)
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| Project Period (FY) |
2017-04-01 – 2020-03-31
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| Project Status |
Completed (Fiscal Year 2019)
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| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2019: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2017: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Keywords | 貧酸素 / 底生有孔虫 / 細胞質立体構造 / マイクロX線CT / 連続切片観察 / 硝酸塩呼吸 / 細胞質 / 古生態 / 細胞構造 |
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| Outline of Final Research Achievements |
We investigated the cytoplasmic structures of bathyal benthic foraminifera, particularly focusing on vacuoles and surrounding ultrastructure. Two deep-infaunal species, which thrive below oxygen penetration depths, have unique cytoplasmic structures, while shallow infaunal species represent similar structures. The unique structures may have some links with their adaptative ecology in dysoxic environments, and further researches are ongoing in terms of functional and genetic traits.
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| Academic Significance and Societal Importance of the Research Achievements |
本研究を通じ、単細胞ながら多室にわかれ、大きな細胞サイズを持つ有孔虫の細胞形態、そして細胞小器官の組成、微生物共生の有無などが、種によって非常に多様であることを明らかにした。これら細胞形質や細胞小器官の多様性が、世界中の多様な海洋環境での繁栄に貢献していると考えられる。また、この現象の背景を解明することは、細胞の大型化、多細胞化の進化過程を考えるうえでも興味深い知見を与えてくれるはずである。
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Report
(4 results)
Research Products
(35 results)
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[Journal Article] Changes in deep-sea benthic foraminiferal fauna caused by turbidites deposited after the 2011 Tohoku-oki earthquake.2020
Author(s)
Tsujimotoa, A, Nomura, R., Arai, K., Nomaki, N., Inoue, M. and Fujikura, K.
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Journal Title
Marine Geology
Volume: 419
Pages: 1-16
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Presentation] Nutritional sources of hydrothermal vent meiofauna revealed by natural-abundance radiocarbon and stable isotope analyses2019
Author(s)
Nomaki H, Uejima Y, Ogawa NO, Yamane M, Watanabe H, Senokuchi R, Bernhard JM, Kitahashi T, Miyairi Y, Yokoyama Y, Ohkouchi N, Shimanaga M
Organizer
17th International Meiofauna Conference
Related Report
Int'l Joint Research
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[Presentation] Abyssal ecosystems and biogeochemical cycles revealed by in-situ experiments2018
Author(s)
Nomaki H, Rastelli E, Amaro T, Tsuchiya M, Seike K, Kitahashi T, Suga H, Miyamoto N, Ogawa NO, Danovaro R, Nunoura T, Ohkouchi N
Organizer
15th Deep-Sea Biology Symposium
Related Report
Int'l Joint Research
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