[M-IS22] Biogeochemistry

Tue. May 27, 2025 1:45 PM - 3:15 PM 102 (International Conference Hall, Makuhari Messe)

convener:Keitaro Fukushima(Fukushima University), Keisuke Koba(Center for Ecological Research, Kyoto University), Youhei Yamashita(Faculty of Environmental Earth Science, Hokkaido University), Naohiko Ohkouchi(Japan Agency for Marine-Earth Science and Technology), Chairperson:Youhei Yamashita(Faculty of Environmental Earth Science, Hokkaido University), Naohiko Ohkouchi(Japan Agency for Marine-Earth Science and Technology)

Biogeochemistry is an interdisciplinary study field including ecology, geochemistry, oceanography, limnology, hydrology, soil science, and environmental sciences. Respective researches have tended to be conducted separately so far. This session aims to provide a common platform for biogeochemists of different disciplines, which facilitates the interactive discussion and information exchanges for the further development of biogeochemical studies.

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1:45 PM - 2:00 PM

[MIS22-01] Biomarker analysis of suspended particles in sea surface layers of the northwestern Pacific off the eastern Hokkaido to the Sanriku coast

*Sena Tsuneda¹, Kotaro Hoshi¹, Akira Kuwata², Hiroshi Kuroda³, Ken Sawada^1,4 (1.Department of Natural History Sciences, Graduate School of Science, Hokkaido University, 2.Tohoku Fisheries Technology Institute, Japan Fisheries Research and Education Agency, 3.Hokkaido Fisheries Technology Institute, Japan Fisheries Research and Education Agency, 4.Department of Earth and Planetary Sciences, Faculty of Science, Hokkaido University)

2:00 PM - 2:15 PM

[MIS22-02] Distribution of trace elements near the interface of the ocean and a tidewater glacier in the Southern Patagonia Icefield

*Naoya Kanna¹, Shin Sugiyama³, Daiki Nomura², Marius Schaefer⁴, Hajime Obata¹ (1.Atmosphere and Ocean Research Institute, The University of Tokyo, 2.The Field Science Center for Northern Biosphere, Hokkaido University, 3.Institute of Low Temperature Science, Hokkaido University, 4.Universidad Austral de Chile)

2:15 PM - 2:30 PM

[MIS22-03] Factors influencing microbial carbon pump efficiency in the hypolimnion of a large lake: Insights from fluorescent dissolved organic matter

*Yasuhiko T. Yamaguchi¹, Koichi Shimotori², Kazuhide Hayakawa¹ (1.Lake Biwa Environmental Research Institute, 2.NIES Lake Biwa Branch Office, National Institute for Environmental Studies)

2:30 PM - 2:45 PM

[MIS22-04] Tracing sources of organic matter driving hypolimnetic oxygen consumption in Lake Biwa using stable carbon and radiocarbon isotopes

*Wataru Nakamura^1,2, Yasuhiko T. Yamaguchi¹, Kazuhide Hayakawa¹, Sho Ogasawara¹, Eiso Inoue¹, Shish Muhammad Soyaib², Yosuke Miyairi², Yusuke Yokoyama² (1.Lake Biwa Environmental Research Institute, 2.The University of Tokyo)

2:45 PM - 3:00 PM

[MIS22-05] Effect of photochemical degradation on stable carbon isotope signature of dissolved oraganic matter

*Haruka Kubo¹, Soshi Abe, Yoshito Chikaraishi², Youhei Yamashita^3,1 (1.Graduate School of Environmental Science, Hokkaido University, 2.Institute of Low Temperature Science, Hokkaido University, 3.Faculty of Environmental Earth Science, Hokkaido University)

3:00 PM - 3:15 PM

[MIS22-06] Dissolved iron behavior of wetland in snowy area - a case study of Maruyama wetland in Sarufutsu River, Hokkaido -

*Takeo Onishi¹, Rin Watanabe¹, Yuto Tashiro³, Takayuki Shiraiwa⁴, Hiroto Itoh², Ken Hiramatsu¹ (1.Faculty of Applied Biological Sciences, Gifu University, 2.Faculty of Engineering, Gifu University, 3.Faculty of Bioresource Science, Akita Prefectural University, 4.Institute of Low Temperature Science, Hokkaido University)

Session information