水圏生態系は、陸域・海洋・大気と密接に連関する開放的かつ複雑なシステムであり、その占有面積に比して極めて高い生物生産力と生物多様性を有し、多様な生態系サービスを提供している。本セッションでは、河川水や地下水を介した物質供給など、陸水と海洋を結ぶ水・物質循環を基盤に、湖沼、河川、湿地、汽水域、干潟、藻場、サンゴ礁、マングローブなど多様な生態系の構造と機能を総合的に議論する。特に、生態系の連環や群集間コネクティビティ、回復力、レジリエンス、環境変動への応答、生態系サービス、水・物質循環の時空間変動、水産資源や生物多様性の維持再生に関する知見を共有する。生態学・地球化学・環境工学など多分野の研究者が学際的に討論することで、陸から沿岸に至る生産系の理解を深め、気候変動や人間活動による環境変化が水圏生態系に及ぼす影響を総合的に捉える視点を育む。さらに、持続的な管理・保全・再生技術の創出と社会実装に向けた研究交流を促進する。本セッションでは、理論研究、室内実験、フィールド調査、リモートセンシング、数値モデルなど、多様な手法による発表を広く歓迎する。

Coastal marine ecosystems are complex open systems 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. Despite occupying relatively small areas, these ecosystems exhibit remarkably high biological productivity and biodiversity, and they provide a wide range of ecosystem services. Building on the fundamental processes of biogeochemical cycles linking land and ocean through rivers, groundwater, and coastal hydrodynamics, this session addresses the structure and functioning of diverse ecosystems such as lakes, rivers, wetlands, estuaries, tidal flats, seagrass and macroalgal beds, mangroves, and coral reefs. Particularly, ecosystem connectivity, linkages among biological communities, resilience and recovery processes, responses to environmental change, and ecosystem services will be discussed. By bringing together researchers from ecology, geochemistry, environmental engineering, and related fields, the session aims to promote interdisciplinary discussions that advance our understanding of aquatic productivity systems from terrestrial to coastal zones, and to develop an integrated perspective on how climate change and human activities influence aquatic ecosystems. This session further seeks to promote knowledge exchange that will contribute to the development and social implementation of sustainable management, conservation, and restoration strategies. We welcome contributions based on theoretical studies, laboratory experiments, field observations, remote sensing, and numerical modeling, covering a broad spectrum of topics including biogeochemical cycling and ecosystem functions, community connectivity, spatiotemporal dynamics of water and material flows, biodiversity conservation, and fisheries resource sustainability.