• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

2023 Fiscal Year Final Research Report

Study on the rapid biotic evolution after the "snowball earth"

Research Project

  • PDF
Project/Area Number 19H02014
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 17050:Biogeosciences-related
Research InstitutionNagoya University

Principal Investigator

Oji Tatsuo  名古屋大学, 博物館, 特任教授 (50160487)

Co-Investigator(Kenkyū-buntansha) 井龍 康文  東北大学, 理学研究科, 教授 (00250671)
高柳 栄子  東北大学, 理学研究科, 准教授 (40729208)
Project Period (FY) 2019-04-01 – 2024-03-31
Keywordsカンブリア紀 / エディアカラ紀 / モンゴル / 多細胞動物 / 藻類 / 生痕化石 / 多様化 / 進化
Outline of Final Research Achievements

Sudden appearance and rapid diversification of multicellular animals occurred from the Ediacaran to the Cambrian, but almost no reliable fossils of multicellular animals have been confirmed from the Ediacaran. Thus, a big unsolved problem exists as to why this diversification has occurred in such a short period of time. In this study, we tackled this issue based on our field survey in Mongolia. We also conducted studies on the relationship between the marine environment and the distribution and growth of benthic organisms, and the preservation mechanisms of exceptionally well-preserved fossils. As a result, it was confirmed that multicellular animals already existed in the Ediacaran period and that there was a predator-prey interaction in the Ediacaran, while the continuous production of fossil algae showed that there was a large extinction event in plants there was no clear extinction at the boundary between the Ediacaran and Cambrian periods, as seen in the enigmatic Ediacaran biota.

Free Research Field

古生物学

Academic Significance and Societal Importance of the Research Achievements

カンブリア紀の多細胞動物の急激な多様化はダーウィン以来の生物学の大きな課題の一つであり、それ以前の時代から化石の証拠が見つからないのは大きな謎であった。我々のモンゴル西部の調査から多細胞動物がカンブリア紀以前に存在したことが見出され、捕食者から逃れる行動をとっていたことも分かってきた。また藻類化石はカンブリア紀以前とそれ以降で連続的に同じ種が産し、動物とは異なる進化を当時示していたことも初めて分かってきた。このような生物進化の大問題をフィールド調査から解明することができたことは、学術界のみならず一般にとってもこの世の中の多様な動物の世界の始まりを知るうえで大きな意義を有すると考えられる。

URL: 

Published: 2025-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi