[B-PT02] Biotic History

Sun. May 24, 2026 3:30 PM - 5:00 PM Exhibition Hall Special Setting (4) (Exhibition Hall 7&8, Makuhari Messe)

Chairperson:Motoyama Isao(Faculty of Science, Yamagata University), Ubukata Takao(Division of Geology & Mineralogy, Department of Earth & Planetary Sciences, Kyoto University), Moriya Kazuyoshi(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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3:30 PM - 3:45 PM

[BPT02-01] Tropic position of symbiont-bearing benthic foraminifers using nitrogen isotopic composition of amino acids

★Invited Papers

*Ayumi Maeda¹, Yuichi Naito², Masashi Tsuchiya³, Yoshito Chikaraishi⁴, Kazuhiko Fujita⁵, Naohiko Ohkouchi⁶, Hodaka Kawahata¹ (1. Atmosphere and Ocean Research Institute, The University of Tokyo, 2. Central Research Institute of Electric Power Industry, 3. Fukui Prefectural University, 4. Institute of Low Temperature Science, Hokkaido University, 5. University of the Ryukyus, 6. Japan Agency for Marine-Earth Science and Technology)

3:45 PM - 4:00 PM

[BPT02-02] Molluscan faunal changes from brackish to freshwater deposits in the Lower Cretaceous Itsuki Formation of the Tetori Group, Japan

★Invited Papers

*Shinji Isaji¹ (1. Natural History Museum and Institute, Chiba)

4:00 PM - 4:15 PM

[BPT02-03] Taphonomic pathways of soft parts preservation in mayfly nymph fossils from the Shiobara-Group-Konservat-Lagerstätten

*Yoshitaka Itakura¹, Gengo Tanaka¹ (1. Kumamoto University)

4:15 PM - 4:30 PM

[BPT02-04] Selective survival at the Cretaceous–Paleogene boundary driven by infrared radiation and climate cooling

*Kunio Kaiho¹, Naga Oshima², Tatsuro Ando³ (1. Tohoku University, 2. Meteorological Research Institute, 3. Ashoro Museum of Paleontology)

4:30 PM - 4:45 PM

[BPT02-05] Deciphering the impact of climate variability on siliceous plankton flux from sediment traps in the oligotrophic Ionian Sea (Eastern Mediterranean)

*Marie Cueille¹ (1. Biogeosciences)

4:45 PM - 5:00 PM

[BPT02-06] Characteristics of submarine/magmatic hydrothermal fluids associated with phosphorous leaching from 2.7 Ga pillow lavas in Abitibi Greenstone Belt

*Yuki Takashina¹, Takeshi Kakegawa¹ (1. Graduate School of Science, Tohoku University)

Session information

[B-PT02] Biotic History

[BPT02-01] Tropic position of symbiont-bearing benthic foraminifers using nitrogen isotopic composition of amino acids

★Invited Papers

[BPT02-02] Molluscan faunal changes from brackish to freshwater deposits in the Lower Cretaceous Itsuki Formation of the Tetori Group, Japan

★Invited Papers

[BPT02-03] Taphonomic pathways of soft parts preservation in mayfly nymph fossils from the Shiobara-Group-Konservat-Lagerstätten

[BPT02-04] Selective survival at the Cretaceous–Paleogene boundary driven by infrared radiation and climate cooling

[BPT02-05] Deciphering the impact of climate variability on siliceous plankton flux from sediment traps in the oligotrophic Ionian Sea (Eastern Mediterranean)

[BPT02-06] Characteristics of submarine/magmatic hydrothermal fluids associated with phosphorous leaching from 2.7 Ga pillow lavas in Abitibi Greenstone Belt

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