Japan Geoscience Union Meeting 2019

Session information

[J] Oral

B (Biogeosciences ) » B-CG Complex & General

[B-CG08] Phanerozoic biodiversity change: Extinction and diversification

Tue. May 28, 2019 1:45 PM - 3:15 PM 105 (1F)

convener:Yukio Isozaki(Department of Earth Science and Astronomy, Multi-disciplinary Sciences - General Systems Studies, Graduate School of Arts and Sciences, The University of Tokyo), Yusuke Sawaki(The University of Tokyo), Chairperson:Wataru Fujisaki(Japan Agency for Marine-Earth Science and Technology)

Phanerozoic biodiversity is the consequence of repeated extinctions and following diversifications in the past, which were caused by large-scale environmental changes, in particular, by extremely rapid and drastic forcing that changed the environments of the biosphere. Irreversible and episodic changes in material cycling on the planet and influences of severe galactic cosmic radiation enhanced by encounter with dark cloud are nominated as major driving mechanisms for the alleged rapid, large-scale environmental perturbations. The biodiversity change in the fossiliferous Phanerozoic record is characterized by 5 major mass extinctions within the long-term trend of diversity increase. Nonetheless, each extinction event has been explained rather in ad hoc manner, without any universal explanation. Therefore, ultimate triggers that caused the Phanerozoic biodiversity still remain as unsolved issues. This session discusses the ancient environmental changes related to Phanerozoic biodiversity under a new light of the recent progress in geology.

2:30 PM - 2:45 PM

*Yuki Tomimatsu1, Tetsuji Onoue2, Daisuke Yamashita3, Tatsuo Nozaki4,5,6,7, Yutaro Takaya8 (1.Graduate school of Science and Technology, Kumamoto University, 2.Faculty of Advanced Science and Technology, Kumamoto University , 3.Satsumasendai City Office, 4.Research and Development Center for Submarine Resources, Japan Agency for Marine-Earth Science and Technology, 5.Frontier Research Center for Energy and Resources (FRC- ER), Graduate School of Engineering, Tokyo University, 6.Department of Planetology, Graduate School of Science, Kobe University, 7.Ocean Resources Research Center for Next Generation, Chiba Institute of Technology, 8.Department of Resources and Environmental Engineering School of Creative Science and Enginerring, Waseda University)




Please log in with your participant account.
» Participant Log In