| Project/Area Number |
22654062
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Single-year Grants |
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| Research Field |
Stratigraphy/Paleontology
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| Research Institution | Osaka City University |
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Principal Investigator |
EZAKI Yoichi 大阪市立大学, 大学院・理学研究科, 教授 (60221115)
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| Co-Investigator(Kenkyū-buntansha) |
NUMATA Hideharu 京都大学, 大学院・理学研究科, 教授 (70172749)
WATANABE Tsuyoshi 北海道大学, 大学院・理学研究科, 講師 (80396283)
GOTO Shinsuke 大阪市立大学, 大学院・理学研究科, 准教授 (70347483)
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| Project Period (FY) |
2010 – 2011
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| Project Status |
Completed (Fiscal Year 2011)
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| Budget Amount *help |
¥3,090,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥390,000)
Fiscal Year 2011: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2010: ¥1,400,000 (Direct Cost: ¥1,400,000)
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| Keywords | 環境変動 / 深海環境 / 層位・古生物学 / 地球化学 / 地質学 / サンゴ / 成長線 / リズム / 時計遺伝子 / 環境 / 結晶構造 |
|---|
| Research Abstract |
The skeleton of Flabellum(F.) magnificum provides a record of environmental variables at various time scales. The different time scales are preserved by different elements of the skeletal structure of this species. In particular, temporal changes in Sr/Ca, Ba/Ca, and Mn/Ca ratios during corallite growth reflect environmental fluctuations(e. g., nutrient availability, hydrothermal activity) at the ocean surface and in deep-sea areas. In addition, circadian rhythmicity was detected in polyp activity, and circadian clock genes were identified. In the future, it will be possible to reconstruct temporal fluctuations in the ocean environment over a period of 50 years, based on analyses of the composition of the skeleton of F. magnificum.
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