| Project/Area Number |
20540452
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Stratigraphy/Paleontology
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| Research Institution | Tohoku University |
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Principal Investigator |
SUZUKI Noritoshi Tohoku University, 大学院・理学研究科, 助教 (60312542)
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| Co-Investigator(Renkei-kenkyūsha) |
KAIHO Kunio 東北大学, 大学院・理学研究科, 教授 (00143082)
YAMAKITA Satoshi 宮崎大学, 教育文化学部, 准教授 (80210342)
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| Project Period (FY) |
2008 – 2010
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| Project Status |
Completed (Fiscal Year 2010)
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| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2010: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2009: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2008: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Keywords | 系統 / 進化 / 多様性 / 三畳紀 / 放散虫 / 大量絶滅 |
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| Research Abstract |
This research focused the explosive evolutionary history of radiolarian Nassellaria from the late Permian to the middle Triassic with geochemical evidences. Multisegmented Nassellaria, one of the diversified Radiolaria in the present ocean, was originated from the Triassocampe-lineage, and they diversified three or four major sub-lineages, and each lineage evolved to new genera like the genus Corum. In the late Permian, no serious mass extinction signals were recognized in radiolarian fauna, but significant unstable faunal shift was recognized. These events do not correspond to our geochemical data at this time, suggesting the presence of unknown but important paleoceanographic events in this geologic interval.
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