[M-IS25] Biogeochemistry

convener:Keisuke Koba(Center for Ecological Research, Kyoto University), Hideaki Shibata(Field Science Center fot Northern Biosphere, Hokkaido University), Naohiko Ohkouchi(Japan Agency for Marine-Earth Science and Technology), Youhei Yamashita(Faculty of Environmental Earth Science, Hokkaido University)

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 further development of biogeochemical studies.

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[MIS25-07] Biogeochemical aspects to improve Japanese nitrogen budgets estimation

*Kentaro Hayashi¹, Hideaki Shibata², Sadao Eguchi¹, Azusa Oita¹, Kazuya Nishina³, Akihiko Ito³, Kiwamu Katagiri⁴, Junko Shindo⁵, Baojing Gu⁶, Wilfried Winiwarter⁷ (1.Institute for Agro-Environmental Sciences, NARO, 2.Hokkaido University, 3.National Institute for Environmental Sciences, 4.Tohoku University, 5.Emeritus, University of Yamanashi, 6.Zhejiang University, 7.International Institute for Applied Systems Analysis)

[MIS25-08] Closed System Synthetic Groundwater Mesocosm Study of Facultative Anaerobic Nitrate Biogeochemistry

*Ned Murphy¹ (1.Central Planet Repair, LLC)

[MIS25-09] Oxygen isotope effect and exchange of a marine anammox species; “Ca. Scalindua sp.”

*Kanae Kobayashi¹, Keitaro Fukushima², Yuji Onishi², Kazuya Nishina³, Akiko Makabe⁴, Mamoru Oshiki⁵, Keisuke Koba², Satoshi Okabe¹ (1.Hokkaido Univ., 2.Center for Ecological Research, Kyoto Univ., 3.National Institute for Environmental Studies, 4.Japan Agency for Marine-Earth Science and Technology, 5.NIT, Nagaoka Coll.)

[MIS25-10] Contribution of vegetation to methane emission produced in the soil of an upland forest: a ¹³CH₄-labelling approach

*Daniel EPRON^1,2, Caroline PLAIN² (1.Kyoto University, 2.University of Lorraine)

[MIS25-11] Nitrogen management in two maize systems of the Tanzanian highlands: approaching the balance of food and environmental objectives

*Jinsen Zheng¹, Shinya Funakawa¹ (1.Graduate School of Global Environmental Studies, Kyoto University)

[MIS25-12] Linking stoichiometric organic carbon–nitrogen relationships to planktonic cyanobacteria and subsurface methane maximum in deep freshwater lakes

Santona Khatun¹, *Tomoya Iwata², Hisaya Kojima³, Yoshiki Ikarashi², Kana Yamanami², Daichi Imazawa¹, Tanaka Kenta⁴, Ryuichiro Shinohara⁵, Hiromi Saito⁶ (1.Integrated Graduate School of Medicine, Engineering, and Agricultural Sciences, University of Yamanashi, 2.Faculty of Life and Environmental Sciences, University of Yamanashi, 3.Institute of Low Temperature Science, Hokkaido University, 4.Mountain Science Center, University of Tsukuba, 5.National Institute for Environmental Studies, 6.Department of Marine Biology and Sciences, Tokai University)