[A-HW32] Material transportation and cycling in aquatic ecosystems; from headwaters to coastal areas

convener:Syuhei Ban(The University of Shiga Prefecture), Adina Paytan(University of California Santa Cruz), Takahiro Hosono(Faculty of Advanced Science and Technology, Kumamoto University), Morihiro Maeda(Okayama University)

This session aims to synthetize watershed sciences in order to understand dynamic processes in transportation and cycling of materials and nutrients in aquatic environments from headwaters to coastal areas. The session will integrate various inter-disciplinary researches including limnology, ground water hydrology, coastal oceanography, meteorology, pedology, sedimentology, forestry, agriculture, fishery, ecology, social science and so on. This session calls for ideas on new methods for understanding the watershed sciences, such as tracer and molecular techniques, hydrological modeling, paleontological approaches, and chemical analyses, in order to elucidate physical, chemical and biological mechanisms for shedding light on natural phenomena and their spatio-temporal variations in complex and dynamic aquatic systems under human and climate impacts. Both laboratory and field studies, social-scientific evaluation of ecosystem services and social-ecological systems will be also welcomed. Through this session, we would like to facilitate interdisciplinary collaboration among participants to create new knowledge on watershed sciences.

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[AHW32-06] Methanotrophic food webs in tropical lakes

*Noboru Okuda¹, Milette U. Mendoza⁹, Jaydan I. Aguilar², Karol Sophia Agape R. Padilla², Jonathan Carlo A. Briones², Rey Donne S. Papa², Masayuki Ito³, Megumu Fujibayashi⁴, Tzu-Hsuan Tu⁵, Li-Hung Lin⁵, Pei-Ling Wang⁵, Yuki Kobayashi⁶, Eleanor Austria⁷, Fuh-Kwo Shiah⁸ (1.Research Institute for Humanity and Nature, 2.University of Santo Tomas, 3. University of Hyogo, 4.Kyushu University, 5.National Taiwan University, 6.Yamaguchi University, 7.Adamson University, 8.Academia Sinica, 9.Ateneo de Manila University)

[AHW32-07] Did artificial re-oligotrophication induce a reduction of fish catch in Lake Biwa?

*Syuhei Ban¹, Xin Liu¹, Masahiro Maruo¹, Naoshige Goto¹, Ken'ichi Osaka¹, Shin-ichi Onodera², Mitsuyo Saito³, Takuya Ishida⁴, Noboru Okuda⁴ (1.The University of Shiga Prefecture, 2.Hiroshima University, 3.Okayama University, 4.Research Institute for Humanity and Nature)

[AHW32-08] Phosphorus dynamics related to phytoplankton growth with newly sensitive measurement of orthophosphate and growth experiments in north basin of Lake Biwa

*Xin Liu¹, Rong Yi^1,2, Masahiro Maruo¹, Syuhei Ban¹ (1.The University of Shiga Prefecture, 2.Gannan Normal University)

[AHW32-09] Detection of Organophosphonates and Phosphite in Suspended Matter of P-limited Lakes

*Masahiro Maruo¹, Kazuma Tsuji², Tomoya Iwata³, Maki Oyagi⁴, Hajime Obata⁵ (1.Department of Ecosystem Studies, School of Environmental Science, The University of Shiga Prefecture, 2.Graduate School of EnvironmentalScience, The University of Shiga Prefecture, 3.Faculty of Life and Environmental Sciences, 4.Facluty of Environment and Infromation Science, 5.Atmosphere and Ocean Research Institute, The University of Tokyo)

[AHW32-10] Role of groundwater and river discharge on phosphorus supply into the lake

*Shin-ichi Onodera¹, Mitsuyo Saito², Kunyang Wang¹, Syuhei Ban³, Noboru Okuda⁴, Yusuke Tomozawa¹ (1.Graduate School of Integrated and Arts Sciences, Hiroshima University, 2.Okayama University, 3.Shiga Prefecture University, 4.Research Institute of Human and Nature)

Cancelled

[AHW32-11] Hydrological controls on phosphorus export from diffuse source in Lake Biwa basin, central Japan.

*Ken'ichi Osaka¹, Haruto Tanabe¹, Takaaki Ishibashi², Syuhei Ban¹ (1.Department of ecosystem study, University of Shiga Prefecture, 2.Graduate school of Environmental Science)