Japan Geoscience Union Meeting 2025

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[E] Poster

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

[A-HW27] Biodiversity, nutrients and other materials in ecosystems from headwaters to coasts

Thu. May 29, 2025 5:15 PM - 7:15 PM Poster Hall (Exhibition Hall 7&8, Makuhari Messe)

convener:Noboru Okuda(Kobe University), Takuya Ishida(Hiroshima University), Masahiro Kobayashi(Kansai Research Center, Forestry and Forest Products Research Institute), Adina Paytan(University of California Santa Cruz)


This session aims to synthetize watershed sciences in order to understand dynamical processes of interactions between organisms, nutrients and other materials in watersheds from mountain tops to receiving water. The session will be integrating a variety of research disciplines including limnology, pedology, ground water hydrology, sedimentology, coastal oceanography, meteorology, forestry, agriculture, fishery 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 in social-ecological systems. For instance, on one hand, human land uses alter dynamics of sediments, macro- and micro-nutrients and pollutants in soils and waters on catchment scales, while changing climates may alter the frequency and intensity of natural disaster, sometimes having catastrophic effects on the watershed systems. On the other hand, globalization causes transboundary pollution and biological invasion between watersheds. Such anthropogenic disturbances, in turn, reduce biodiversity and thus deteriorate its ecosystem services in watersheds and coasts, posing a risk to sustainable human development. The dogma of watershed sciences may lead us to the solution for sustainable future of social-ecological watershed systems as the basis of our existence. This session also calls for ideas on new methods for the watershed sciences, such as tracer and molecular technique, modeling and paleontological approaches, laboratory and field experiments, and so on, in order to elucidate biological, chemical and physical 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.

5:15 PM - 7:15 PM

[AHW27-P07] Estimation of SS loading from an Upland Agricultural
Temperate Catchment using SWAT

*Francis Jhun Tin-ao Macalam1,2, Kunyang Wang1, Shin-chi Onodera1, Mitsuyo Saito1, Yuko Nagano3, Masatoshi Yamazaki4 (1.Graduate School of Advanced Science and Engineering, Hiroshima University, 2.Department of Environmental Science and Technology, College of Science and Mathematics, University of Science and Technology of Southern Philippines, Cagayan de Oro City, 9000, Philippines, 3.Japan Forest Technology Association, Rokubancho, Chiyoda-ku, Tokyo 102-0085, Japan, 4.PASCO Corporation, PASCO Meguro Sakura Bldg, 1-7-1 Shimomeguro, Meguro-ku, Tokyo 153-0064, Japan)


5:15 PM - 7:15 PM

[AHW27-P08] Microbial Communities on Microplastics from the Tuul River System, Mongolia

*Batdulam Battulga1,2, Masataka Nakayama1,3, Dolgormaa Munkhbat4, Mariko Atarashi-Andoh1, Jun Koarashi1, Mayayuki Kawahigashi4 (1.Nuclear Science and Engineering Center, Japan Atomic Energy Agency, Ibaraki, 319-1195, Japan, 2.Advanced Institute for Marine Ecosystem Change (WPI-AIMEC), Tohoku University, Sendai, Miyagi, 980-8578, Japan, 3.Arid Land Research Center, Tottori University, Tottori, 680-0001, Japan, 4.Department of Geography, Graduate School of Urban Environmental Science, Tokyo Metropolitan University, Tokyo, 192-0397, Japan )

5:15 PM - 7:15 PM

[AHW27-P14] Vertical Distribution of Phosphorus Species in a Sediment Core in Jakarta Bay

*Muhammad Shahinur Rahman1,2, Shin-ichi Onodera1, Mitsuyo Saito1, Takuya Ishida1, Takahiro Hosono3, Yu Umezawa4 (1.Graduate School of Advanced Science and Engineering, Hiroshima University, 2.Physical and Space Oceanography Division, Bangladesh Oceanographic Research Institute, 3.Faculty of Advanced Science and Technology, Kumamoto University, 4.Department of Environmental Science on Biosphere, Tokyo University of Agriculture and Technology)

5:15 PM - 7:15 PM

[AHW27-P15] Relationship between Exchangeable Phosphate in Seawater (EPS) in sediment and coral reef abundance in Sekisei Lagoon

*Alice Yamazaki1, Toma Tanigami1, Ryota Ide1, Nanami Nizusawa1, Shugo Watabe1, Mariko Iijima2, Takahiro Hosono3, Jun Yasumoto4, Takashi Nakamura5, Ko Yasumoto1 (1.Kitasato university School of Marine Biosciences, 2.The National Institute of Advanced Industrial Science and Technology, 3.Faculty of Advanced Science and Technology, Kumamoto University, 4.University of Ryukyus, Faculty of Agriculture, 5.University of Ryukyus, Faculty of Science)


5:15 PM - 7:15 PM

[AHW27-P16] Assessment of Terrestrial Influence on Coral Reef Abundance through Microbial Community Analysis and Exchangeable Phosphate in Seawater for Sediments in Sekisei Lagoon

*Toma Tanigami1, Nanami Mizusawa1, Alice Yamazaki1, Ryota Ide1, Shugo Watabe1, Mariko Iijima2, Jun Yasumoto3, Takashi Nakamura4, Takahiro Hosono5, Ko Yasumoto1 (1.Kitasato university School of Marine Biosciences, 2.National Institute of Advanced Industrial Science and Technology, 3.University of the Ryukyus, Faculty of Agriculture, 4.University of the Ryukyus, Faculty of Science, 5.Faculty of Advanced Science and Technology, Kumamoto University)


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