[B-PT07] Biotic history and its relation to the Earth history

Wed. May 25, 2016 10:45 AM - 12:15 PM 303 (3F)

Convener:*Isao Motoyama(Department of Earth and Environmental Sciences, Yamagata University), Takao Ubukata(Division of Geology & Mineralogy, Department of Earth & Planetary Sciences, Kyoto University), Kazuyoshi Moriya(Department of Earth Sciences, Faculty of Education and Integrated Arts and Sciences, Waseda University), Chair:Isao Motoyama(Department of Earth and Environmental Sciences, Yamagata University), Takao Ubukata(Division of Geology & Mineralogy, Department of Earth & Planetary Sciences, Kyoto University), Kazuyoshi Moriya(Department of Earth Sciences, Faculty of Education and Integrated Arts and Sciences, Waseda University)

The Biotic History session covers all aspects of ancient life and the history of biosphere through the geologic time. The study of ancient life is essential for unveiling mysteries of our planet earth. It also provides evidence for evolution of oceans, continents and island arcs. Modern progress in this field has been enhanced by interdisciplinary collaboration with allied sciences, such as paleoceanography and evolutionary biology. Our session intends to be a hub of communication amongst all earth scientists studying the biosphere; we welcome biological and biogeochemical approaches toward the understanding of the history of life.

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10:45 AM - 11:00 AM

[BPT07-07] Ontogenetic stable isotope records of Eocene planktic foraminifers: Comparison to modern symbiotic species observation

*Haruka TAKAGI¹, Kazuyoshi Moriya², Toyoho Ishimura³ (1.Graduate School of Creative Science and Engineering, Waseda University, 2.Department of Earth Sciences, Waseda University, 3.National Institute of Technology, Ibaraki College)

11:00 AM - 11:15 AM

[BPT07-08] Radiolarian faunal turnover across the early/middle Miocene boundary in the eastern equatorial Pacific Ocean

*Shin-ichi Kamikuri¹ (1.Faculty of Education, Ibaraki University)

11:15 AM - 11:30 AM

[BPT07-09] Geologic age of the whale fossil-bearing calcareous float concretion from the Hae River, Hokkaido, Japan, based on radiolarian and diatom analyses

*Isao Motoyama¹, Toshiaki Maruyama¹, Tomohiro Nishimura², Kazuhiko Sakurai², Akane Kasukawa¹, Kenji M. Matsuzaki³ (1.Department of Earth and Environmental Sciences, Yamagata University, 2.Hobetsu Museum, 3.Geological Survey of Japan, AIST)

11:30 AM - 11:45 AM

[BPT07-10] The extinct pinniped Allodesmus (Mammalia: Carnivora) from the Miocene of Hokkaido, northern Japan, and its implications for phylogeny and postcranial morphology

*Wataru Tonomori¹, Hiroshi Sawamura², Tamaki Sato³, Naoki Kohno^1,4 (1.Graduate School of Life and Enviromental Sciences, University of Tsukuba, 2.Ashoro Museum of Paleontology, 3.Department of Astronomy and Earth Sciences, Tokyo Gakugei University, 4.Department of Geology and Paleontology, National Museum of Nature and Science)

11:45 AM - 12:00 PM

[BPT07-11] Evaluation of early diagenetic influence on nitrogen isotopes within fossil amino acids: Towards estimation of ancient food webs

*Daijiro Hagehashi¹, Robert Jenkins², Akiko S. Goto², Yoshito Chikaraishi³, Takashi Hasegawa² (1.Division of Environmental Science and Engineering, Graduate school of Natural Science and Technology, Kanazawa University, 2.School of Natural System, College of Science and Engineering, Kanazawa University, 3.Japan Agency for Marine-Earth Science and Technology)

12:00 PM - 12:15 PM

[BPT07-12] Effects of carbonate chemistry and metabolism induced by ocean acidification on stable isotope fractionation in molluscan shell carbonate

*Kozue Nishida^1,2, Masahiro Hayashi³, Akari Nagoshi⁴, Hodaka Kawahata⁴, Mizuho Sato^1,5, Atsushi Suzuki¹ (1.National Institute of Advanced Industrial Science and Technology, 2.The University Museum, UTokyo, 3.Marine Ecology Research Institute, 4.AORI, UTokyo, 5.Asahi Geo-Survey Co. Ltd)