JpGU-AGU Joint Meeting 2017

Presentation information

[EJ] Oral

B (Biogeosciences) » B-CG Complex & General

[B-CG09] [EJ] Phanerozoic biodiversity change: Extinction and diversification

Tue. May 23, 2017 10:45 AM - 12:15 PM 201B (International Conference Hall 2F)

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:Yusuke Sawaki(The University of Tokyo)

11:45 AM - 12:00 PM

[BCG09-05] Land ecosystem collapse followed by marine environmental stress spanning the Permian-Triassic mass extinction

*Raman Kumar Biswas1, Kunio Kaiho1, Ryosuke Saito1, Zhiqiang Shi2 (1.Graduate School of Science and Faculty of Science, Tohoku University, 2.Chengdu University of Technology, Chengdu, China)

Keywords:Permian-Triassic, Mass extinction, Land plant, Environmental stress, Shangsi, Organic geochemistry

The Permian–Triassic mass extinction was the most devastating extinction in the Phanerozoic Era. We investigated the biomarkers from the Shangsi section, South China, to identify changes in the biosphere and marine environments. We show that the collapse of land vegetation occurred before the latest Permian marine extinction at the Shangsi section. The stressful environmental conditions were persisted during the earliest Triassic rather than the latest Permian marine extinction. The second phase of stressful environmental conditions occurred in the late Griesbachian.