Outline of Session


Biogeosciences(B) / Paleontology(PT)
B-PT27 End-Proterozoic/Phanerozoic biodiversity change: extinction and radiation

Short title biodiversity change
Oral presentation
May 24 AM1 (09:00 - 10:45) 104 Yusuke Sawaki 
May 24 AM2 (11:00 - 12:45) 104 Yukio Isozaki 
Poster presentation
May 24 (Core Time 18:15 - 19:30) Convention Hall
Contact Yukio Isozaki
Email isozaki@ea.c.u-tokyo.ac.jp
Convener Yukio Isozaki  / Yusuke Sawaki 
Scope 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.

Time Presentation No Title Author Presenter Abstract
Oral Presentation   May 24 AM1 (09:00-10:45) 104                              to the top
09:00 - 09:15 BPT27-01 Diagenetic signatures of the Gaskies glaciation and their implication to the Ediacaran stratigraphy KANO, Akihiro
FURUYAMA, Seishiro
KANO, Akihiro English
09:15 - 09:30 BPT27-02 When did the "Cambrian agronomic revolution" start? YADA, Keigo
OJI, Tatsuo
DORNBOS, Stephen
YADA, Keigo English
09:30 - 09:45 BPT27-03 Soil erosion event during the Late Devonian mass extinction recorded at the GSSP section MIURA, Mami
KAIHO, Kunio
CASIER, Jean-georges
MIURA, Mami English
09:45 - 10:00 BPT27-04 Assessment of mode of extinction and recovery based on changes in morphospace and species-abundance relationship UBUKATA, Takao UBUKATA, Takao English
10:00 - 10:15 BPT27-05 Changes in biofacies and environments at the end-Gudalupian: response in mid-latitude ISOZAKI, Yukio
HAYASHI, Ryutaro
KANI, Tomomi
ISOZAKI, Yukio English
10:15 - 10:30 BPT27-06 The collapse of a Capitanian (Middle Permian) reef: Sr-isotope profile at Iwaizaki, NE Japan KANI, Tomomi
HAYASHI, Ryutaro
KANI, Tomomi English
10:30 - 10:45 BPT27-07 Sulfur and carbon isotope study for understanding environmental changes across the Middle/Late Permian boundary MARUOKA, Teruyuki
MARUOKA, Teruyuki English
Oral Presentation   May 24 AM2 (11:00-12:45) 104                              to the top
11:00 - 11:15 BPT27-08 Perturbations of the nitrogen cycle in mid-Panthalassa in the Late Guadalupian (Middle Permian) SAITOH, Masafumi
UENO, Yuichiro
SAITOH, Masafumi English
11:15 - 11:30 BPT27-09 A unique Cr-enriched bed across the Guadalupian-Lopingian boundary (Permian) in mid-Panthalassan paleo-atoll carbonates ISHIKAWA, Akira
ISHIKAWA, Akira English
11:30 - 11:45 BPT27-10 Organic carbon isotope changes at P-T boundary in Gujohachiman, Japan TAHATA, Miyuki
EBISUZAKI, Toshikazu
TAHATA, Miyuki English
11:45 - 12:00 BPT27-11 Abrupt surface-water reduction accompanied with massive soil inflow during the end-Permian mass extinction KAIHO, Kunio
ITO, Kosuke
SAITO, Ryosuke
KAIHO, Kunio English
12:00 - 12:15 BPT27-12 Osmium isotope composition in the deep pelagic Panthalassa ocean during the Toarcian Oceanic Anoxic Event FUJISAKI, Wataru
UEDA, Hisahiro
SUDA, Konomi
FUJISAKI, Wataru English
12:15 - 12:30 BPT27-13 Birth place and migration history of primates: Proposal of new model MARUYAMA, Shigenori MARUYAMA, Shigenori English
12:30 - 12:45 3-min talk in an oral session (BPT27-P01/BPT27-P02/BPT27-P03)

Presentation No Title Author Presenter Abstract
Poster Presentation   May 24  Core Time (18:15-19:30) Convention Hall                    to the top
BPT27-P01 Spongy parenchyma found in meta-tuff of Hitachi Cambrian Akazawa Formation TAGIRI, Michio
HANAWA, Katsutoshi
TAGIRI, Michio English
BPT27-P02 Middle-Late Ordovician biodiversification and relevant environmental changes in Estonia SHIMATSUKA, Momoko
KANI, Tomomi
SHIMATSUKA, Momoko English
BPT27-P03 Organic geochemical evidences for smoke clouds induced by an asteroid impact at the Cretaceous-Paleogene boundary KAIHO, Kunio
SAITO, Ryosuke
KAIHO, Kunio English
BPT27-P04 Euxinic conditions at Three Gorges area as opposed to global oxidation event, around PC/C boundary SAWAKI, Yusuke SAWAKI, Yusuke English