Japan Geoscience Union Meeting 2015

Session information


Symbol B (Biogeosciences) » B-PT Paleontology

[B-PT27] End-Proterozoic/Phanerozoic biodiversity change: extinction and radiation

Sun. May 24, 2015 9:00 AM - 10:45 AM 104 (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(Tokyo Institute of Technology), Chair:Yusuke Sawaki(Tokyo Institute of Technology)

Biotic evolution was the consequence of repeated extinction and following diversification in the past, which was caused by large-scale environmental changes, in particular, by extremely rapid and drastic forcing that changed the environments of the biosphere. Irreversible and episodic episodes, such as the changes in material cycling by mantle plume and the increase in cosmic radiation by the encounter with dark cloud, are nominated as major driving mechanisms for the alleged rapid, large-scale environmental perturbations. As to the biodiversity change in the end-Proterozoic to Phanerozoic, many essential questions are still not answered yet by the conventional viewpoints and procedures.
This session discusses the Phanerozoic biodiversity change under a new light of the recent progress in geology.

9:15 AM - 9:30 AM

*Keigo YADA1, Tatsuo OJI2, Stephen DORNBOS3, Hitoshi HASEGAWA2, Sersmaa GONCHIGDORJ4, Takafumi MOCHIZUKI5, Hideko TAKAYANAGI4, Yasufumi IRYU6 (1.Graduate School of Environmental Studies, Nagoya University, 2.Nagoya University Museum, Nagoya University, 3.University of Wisconsin-Madison, 4.Mongolian University of Science and Technology, 5.Iwate Prefectural Museum, 6.Department of Earth Science, Tohoku University)