Japan Geoscience Union Meeting 2018

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[EE] Oral

A (Atmospheric and Hydrospheric Sciences) » A-HW Hydrology & Water Environment

[A-HW20] Materials transport and nutrient cycles in watersheds; Human and climate impacts

Sun. May 20, 2018 1:45 PM - 3:15 PM 105 (1F International Conference Hall, Makuhari Messe)

convener:Mitsuyo Saito(Graduate School of Environmental and Life Science, Okayama University), Shin-ichi Onodera(Graduate School of Integrated and Arts Sciences, Hiroshima University), Takahiro Hosono(熊本大学大学院先導機構, 共同), Adina Paytan(University of California Santa Cruz), Chairperson:Saito Mitsuyo(Graduate School of Environmental and Life Science, Okayama University)

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 focusing on human and climate impacts. The session will be integrating a variety of research disciplines including limnology, ground water hydrology, coastal oceanography, meteorology, pedology, sedimentology, forestry, agriculture, fishery, social science and more. The watershed sciences also challenge us to solve environmental issues emerged in the watersheds through our profound understanding of relations between humanity and nature. For instance, on one hand, human land uses alter water resources, dynamics of sediments, nutrients and pollutants in waters and soils on watershed scales, while changing climates may alter water cycle, the frequency and intensity of materials transport and natural disaster, sometimes having catastrophic effects on the watershed systems. This session also 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. Through this session, we would like to facilitate interdisciplinary collaboration among participants to create new knowledge on watershed sciences.

Introduction (1:45 PM - 1:50 PM)

2:10 PM - 2:25 PM

[AHW20-02] Biodiversity and phosphorus cycling in the river ecosystem

*Noboru Okuda1, Takuya Ishida1, Yoshitoshi Uehara1, Tohru Ikeya1, Satoshi Asano2, Tomoya Iwata3, Chia-Ying Ko4, Elfritzson Peralta5, Osbert Leo Privaldos6, Irisse Bianca De Jesus5, Ellis Mika Triño5, Ken'ichi Osaka7, Ichiro Tayasu1 (1.Research Institute for Humanity and Nature, 2.Lake Biwa Environmental Research Institute, 3.University of Yamanashi, 4.National Taiwan University, 5.University of Santo Tomas, 6.Laguna Lake Development Authority, 7.University of Shiga Prefecture)

2:25 PM - 2:40 PM

[AHW20-03] Spatial variation in phosphorus and nitrogen spiral metrics in a tropical watershed in relation to land uses

*Irisse Bianca Baldovino De Jesus1,4, Elfritzson Martin Peralta3,4, Paul Palomares, Jonathan Carlo Briones2,3,4, Francis Magbanua5, Rey Donne Papa3,2,4, Tomoya Iwata6, Noboru Okuda7 (1.Senior High School, University of Santo Tomas, Philippines, 2.College of Science, University of Santo Tomas, Philippines, 3.The Graduate School, University of Santo Tomas, Philippines, 4.Research Center for Natural and Applied Sciences, University of Santo Tomas, Philippines, 5.Institute of Biology, University of the Philippines-Diliman, Philippines, 6.Faculty of Life and Environmental Sciences, University of Yamanashi, Japan, 7.Research Institute for Humanity and Nature, Kyoto, Japan)

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