[A-HW22] Materials transport and nutrient cycles in watersheds; from headwaters to coastal seas

Thu. May 30, 2019 9:00 AM - 10:30 AM 201B (2F)

convener:Masahiro Kobayashi(Forestry and Forest Products Research Institute), Seiko Yoshikawa(Institute for Agro-environmental Sciences, National Agriculture and Food Research Organization), Jun Yasumoto(University of the Ryukyus, Faculty of Agriculuture), Adina Paytan(University of California Santa Cruz), Chairperson:Adina Paytan(University of California, Santa Cruz)

This session aims to synthetize watershed sciences in order to understand dynamical processes of materials transport and nutrient cycles in watersheds from headwaters to coastal seas. The session will be integrating a variety of research disciplines including limnology, ground water hydrology, coastal oceanography, meteorology, pedology, sedimentology, forestry, agriculture, fishery, ecology, social science and more. This session calls for ideas on new methods for the watershed sciences, such as tracer and molecular technique, hydrological modeling, paleontological approaches, laboratory and field experiments, social-scientific evaluation of ecosystem services and social-ecological systems, and so on, in order to elucidate physical, chemical and biological mechanisms for shedding light on natural phenomena and their changes over time in complex and dynamic watershed systems under human and climate impacts. Through this session, we would like to facilitate interdisciplinary collaboration among participants to create new knowledge on watershed sciences.

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9:00 AM - 9:15 AM

[AHW22-06] Biodiversity increases integrated trophic position of macroinvertebrate communities in coastal food webs: testing the vertical diversity hypothesis

*Noboru Okuda¹, Jin'ichi Karube², Yoichiro Sakai³, Tomohiro Takeyama⁴, Ichiro Tayasu¹, Chikage Yoshimizu¹, Toshi Nagata⁵ (1.Research Institute for Humanity and Nature, 2.Kindai University, 3.Lake Biwa Environmental Research Institute, 4.Okayama University of Science, 5.University of Tokyo)

9:15 AM - 9:30 AM

[AHW22-07] The analysis of the community composition of riverine bacteria and microalgae in relation to nutrient status and diversity: the case in irrigation season in the Yasu River, Japan

*Tohru Ikeya¹, Takuya Ishida¹, Yoshitoshi Uehara¹, Satoshi Asano², Ichiro Tayasu¹, Noboru Okuda¹, Masayuki Ushio^3,4,5, Shohei Fujinaga⁴, Chia-Ying Ko⁶, Elfritzson Martin Peralta⁷, Naoto F. Ishikawa⁸, Tomoya Iwata⁹ (1.Research Institute for Humanity and Nature, 2.Lake Biwa Environmental Research Institute, 3.Hakubi Center, Kyoto University, 4.Center for Ecological Research, Kyoto University, 5.PRESTO, Japan Science and Technology Agency, 6.National Taiwan University, 7.University of Santo Tomas, 8.Department of Biogeochemistry, Japan Agency for Marine-Earth Science and Technology, 9.Faculty of Life and Environmental Sciences, Yamanashi University)

9:30 AM - 9:45 AM

[AHW22-08] Multiple stressors and protection efforts in highly urbanized watersheds in the Philippines

*Elfritzson M. Peralta^1,3, Leocris S. Batucan Jr.^4,6, Alexis E. Belen^2,3, Irisse Bianca B. De Jesus^1,3, Takuya Ishida⁵, Chia-Ying Ko⁷, Yuki Kobayashi⁵, Tohru Ikeya⁵, Yoshitoshi Uehara⁵, Tomoya Iwata⁸, Adelina S. Borja⁹, Jonathan Carlo A. Briones^1,2,3, Francis S. Magbanua⁴, Rey Donne S. Papa^1,2,3, Noboru Okuda⁵ (1.Research Center for the Natural and Applied Sciences, University of Santo Tomas, PH, 2.Department of Biological Sciences, University of Santo Tomas, PH, 3.The Graduate School, University of Santo Tomas, PH, 4.Institute of Biology, University of the Philippines Diliman, PH, 5.Research Institute for Humanity and Nature, JP, 6.Academia Sinica and Department of Life Science, National Taiwan Normal University, TW, 7.Institute of Fisheries Science and Department of Life Science, National Taiwan University, TW, 8.Faculty of Life and Environmental Sciences, University of Yamanashi, JP, 9.Resource Management and Development Department, Laguna Lake Development Authority, PH)

9:45 AM - 10:00 AM

[AHW22-09] Ammonium contamination of shallow groundwater beneath vegetable fields in Central Vietnam

★Invited Papers

*Maeda Morihiro¹, Takuya Fujimura¹, Van Ngoc Tuong Hoang², Daisuke Inoue³, Hidetaka Chikamori¹, Fujio Hyodo¹ (1.Okayama University, 2.Hue University, 3.Osaka University)

10:00 AM - 10:15 AM

[AHW22-10] Modelling nutrient and organic waste behaviour in a tropical wetland in Singapore under projected anthropogenic scenarios

*Swee Yang Edmund Low¹, Dong Eon Kim¹, Canh Tien Trinh Nguyen¹, Yixiong Cai, Shie-Yui Liong¹ (1.National University of Singapore)

10:15 AM - 10:30 AM

[AHW22-11] Benthic macroinvertebrate assemblages and water quality reflect the impacts of land use and land cover in Marikina Watershed, Philippines

*Julie - An N. Gregorio^1,2, Elfritzson M. Peralta^3,5, Irisse Bianca B. de Jesus^3,5, Tohru Ikeya⁶, Jonathan Carlo A. Briones^3,4,5, Rey Donne S. Papa^3,4,5, Francis S. Magbanua¹, Noboru Okuda⁶ (1.Institute of Biology, University of the Philippines, Diliman, Quezon City, 1101 Philippines, 2.Institute of Environmental Science and Meteorology, University of the Philippines, Diliman, Quezon City 1101 Philippines, 3.Research Center for the Natural and Applied Sciences, University of Santo Tomas, España Boulevard, Manila, 1015, Philippines, 4.Department of Biological Sciences, University of Santo Tomas, España Boulevard, Manila, 1015, Philippines, 5.The Graduate School, University of Santo Tomas, España Boulevard, Manila, 1015, Philippines, 6.Research Institute for Humanity and Nature, 457-4 Motoyama, Kamigamo, Kyoto, 603-8047, Japan)

Session information