[A-CG15] Coastal Ecosystems - 2. Coral reefs, seagrass meadows, and mangroves

Tue. May 24, 2016 1:45 PM - 3:15 PM 301A (3F)

Convener:*Toshihiro Miyajima(Marine Biogeochemistry Group, Division of Ocean-Earth System Science, Atmosphere and Ocean Research Institute, The University of Tokyo), Atsushi Watanabe(Department of Mechanical and Environmental Informatics Graduate School of Information Science and Engineering Tokyo Institute of Technology), Yu Umezawa(Nagasaki University), Chair:Toshihiro Miyajima(Marine Biogeochemistry Group, Division of Ocean-Earth System Science, Atmosphere and Ocean Research Institute, The University of Tokyo), Yoshiyuki TANAKA(Japan Agency for Marine-Earth Science and Technology Mutsu Institute for Oceanography)

Coastal marine ecosystems are complex open system interacting with surrounding watersheds, outer ocean, and the atmosphere. They provide a wealth of various ecosystem services to human life, however, at the same time, are also influenced strongly and often negatively by human activities. This session, together with a companion session dedicated for the water cycle and land-ocean interactions [A-XX##], aims to provide a platform for interdisciplinary discussion covering various aspects of frontiers in coastal ecosystem sciences. This session particularly focuses shallow-water benthic communities such as coral reefs, seagrass meadows, and mangroves. All these communities are characterized by originally high primary production, active material cycling, and biodiversity hot spots. However, increasing human demand for coastal marine resources and industrial development concentrating on coastal regions incur the risk of rapid degradation and diminishment. Comprehensive assessment and monitoring of ecosystem functions and development of effective means for conservation and restoration are urgently needed for such communities. This session is dedicated to organizing and promoting such research and management activities by sharing state-of-the-art science and technology among ecologists, geologists, geochemists, biogeographers, etc. Case and modeling studies concerning the following topics are especially welcome: material cycling and ecosystem functions; climate changes such as global warming, ocean acidification, and sea-level rise; ecosystem services such as carbon sequestration, nutrient regulation, and fisheries production; broad-scale comparison; long-term ecological researches.

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1:45 PM - 2:00 PM

[ACG15-01] The effects of latitude on mangroves inferred from forest structure and productivity in the Ryukyu archipelago

★Invited papers

*Rempei Suwa¹ (1.Forestry and Forest Products Research Institute)

2:00 PM - 2:15 PM

[ACG15-02] Net uptake of atmospheric CO₂ in human-dominated estuarine and shallow coastal systems: empirical studies and the ecosystem modeling

*Tomohiro Kuwae¹, Jota Kanda², Atsushi Kubo², Fumiyuki Nakajima³, Hiroshi Ogawa⁴, Akio Sohma⁵, Masahiro Suzumura⁶ (1.Port and Airport Research Institute, 2.Tokyo University of Marine Science, 3.University of Tokyo, 4.Atmosphere and Ocean Research Institute, 5.Mizuho Information and Research Institute, 6.National Institute of Advanced Industrial Science and Technology)

2:15 PM - 2:30 PM

[ACG15-03] Field observations and the path analysis of CO₂ fugacity in shallow coastal waters of Japan

*Kazufumi Tada^1,2,4, Tatsuki Tokoro², Kenta Watanabe², Shoji Yamamoto³, Keisuke Nakayama⁴, Tomohiro Kuwae² (1.Chuden Engineering Consultants Co., Ltd., 2.Port and Airport Research Institute, 3.The University of Tokyo, 4.Kobe University)

2:30 PM - 2:45 PM

[ACG15-04] Seagrass biomass as a controlling factor of organic carbon stocks in subtropical seagrass meadows

*Toko Tanaya¹, Kenta Watanabe¹, Shoji Yamamoto², Chuki Hongo³, Hajime Kayanne², Tomohiro Kuwae¹ (1.Port and Airport Research Institute, 2.The University of Tokyo, 3.University of the Ryukyus)

2:45 PM - 3:00 PM

[ACG15-05] Total alkalinity flux at seagrass meadow estimated by eddy covariance and pore water profiles in sediment

*Shoji Yamamoto¹, Hajime Kayanne¹, Chuki Hongo², Toko Tanaya³, Kenta WATANABE³, Tomohiro Kuwae³ (1.The University of Tokyo, Department of Earth and Planetary Science, 2.University of the Ryukyus, 3.Port and Airport Research Institute)

3:00 PM - 3:15 PM

[ACG15-06] Sustained eutrophic conditions in mariculture areas of Bolinao and Anda, Philippines as seen using biogeochemical indices including oxygen isotope of phosphate

Charissa M Ferrera¹, Toshihiro Miyajima², Maria Lourdes San Diego-McGlone³, Naoko Morimoto², Yu Umezawa⁴, Eugene Herrera⁵, Takumi Tsuchiya¹, Masaya Yoshikai¹, Kazuo Nadaoka¹, *Atsushi Watanabe¹ (1.Tokyo Institute of Technology, 2.AORI, University of Tokyo, 3.Marine Science Institute, University of the Philippines Diliman, 4.Faculty of Fisheries, Nagasaki University, 5.nstitute of Civil Engineering, University of the Philippines Diliman)