[A-CG56] Coastal Ecosystems-2. Coral reefs, seagrass and macroalgal beds, and mangroves

convener:Yu Umezawa(Tokyo University of Agriculture and Technology), Toshihiro Miyajima(Marine Biogeochemistry Group, Division of Ocean-Earth System Science, Atmosphere and Ocean Research Institute, The University of Tokyo), Atsushi Watanabe(The ocean policy research institute, The Sasakawa peace foundation), Tomihiko Higuchi(Atmosphere and Ocean Research Institute, The University of Tokyo)

Coastal marine ecosystems are complex open system interacting with surrounding watersheds, outer ocean, and the atmosphere, providing a wealth of various ecosystem services to human life. Simultaneously, they 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, 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 ranging from temperate to tropical regions, such as coral reefs, seagrass and macroalgal beds, mangroves, intertidal flats, and saltmarshes. All these communities are characterized by intrinsically 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. Field-based and modeling studies concerning the following topics are especially welcome: material cycling and ecosystem functions; community connectivity; environmental 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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Introduction (2:15 PM - 2:20 PM)

[ACG56-01] Grand Design of Mangrove Habitat Dynamics and the Key Factors

★Invited Papers

*Toyohiko Miyagi¹, Shigeyuki Baba², Tomomi Inoue³, Yasuo Akaji³, Gakugun Chou³, Keita Furukawa⁴ (1.NIES, Tohoku-Gakuin University, 2.ISME, 3.NIES, 4.PEMSEA)

[ACG56-02] Assessment of mangrove ecosystem variations: a comparative study in Ba and Rewa delta, Fiji

Miliana Saboti Navia², Jone Ravuci Sassen², Ram Avtar^1,2, *Masahiko Fujii^1,2 (1.Faculty of Environmental Earth Science, Hokkaido University, 2.Graduate School of Environmental Science, Hokkaido University)

[ACG56-03] Modeling mangrove growth dynamics affected by soil salinity and species composition

*Yoshikai Masaya¹, Takashi Nakamura¹, Sahadev Sharma², Jun Yasuoka³, Ryohei Egawa³, Rempei Suwa⁴, Kazuo Nadaoka¹ (1.School of Environment and Society, Tokyo Institute of Technology, 2.Institute of Ocean and Earth Sciences, University of Malaya, 3.Department of Mechanical and Environmental Informatics, Tokyo Institute of Technology, 4.Forestry Division, Japan International Research Center for Agricultural Sciences)

[ACG56-04] Foraminifera as bioindicators of low-latitude coastal ecosystems

★Invited Papers

*Kazuhiko Fujita¹ (1.Department of Physics and Earth Sciences, University of the Ryukyus)

[ACG56-05] Anthropogenic Anoxic History of the Tuvalu Atoll Recorded as Annual Black Bands in Coral

*Nobuko Nakamura^1,2,3, Hajime Kayanne¹, Yoshio Takahashi¹, Michinari Sunamura¹, Go Hosoi^1,4, Hiroya Yamano⁵ (1.University of Tokyo, 2.Keio University, 3.THE SASAKAWA PEACE FOUNDATION, 4.Dentsu Inc., 5.National Institute for Environmental Studies)