2012 Fiscal Year Final Research Report
Origination of multicellular organisms and oxygen
| Project/Area Number |
22403016
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 海外学術 |
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| Research Field |
Stratigraphy/Paleontology
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| Research Institution | Tohoku University |
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Principal Investigator |
KAIHO Kunio 東北大学, 大学院・理学研究科, 教授 (00143082)
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| Co-Investigator(Kenkyū-buntansha) |
OBA Masahiro 東北大学, 大学院・理学研究科, 助教 (40436077)
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| Project Period (FY) |
2010 – 2012
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| Keywords | 大進化 / 酸素 / 原生代 / 新原生代 / エディアカラ紀 / カンブリア紀 / 全球凍結 |
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| Research Abstract |
Organic-molecular dissolved-oxygen index above and below storm wave base, from Ediacaran to Cambrian marine sedimentary rocks in Australia and China records three rises in dissolved oxygen levels. The first rise in dissolved oxygen levels coincides with molecular diversification of animals in the early Ediacaran, the second rise with appearance of large Ediacaran animal fossils, its drop with extinction of Ediacaranmetazoa, and the third rise is coeval the explosion of Cambrian metazoa.
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