The first international Workshop on the Caspian Sea Ecosystem was held at Sari Agricultural Sciences and Natural Resources University from July 4th to 12th,2023; with the discussion of the following topics: Changes in climate, land use and cover, and social economy The ecosystem biology, biodiversity, services, and conservation The eco-hydrological interactions, water use, and water management Natural hazards induced by climate change and anthropogenic activities The ecosystem observation, modeling, RS & GIS, and capacity building 6. The Integrated ecosystem management and regional sustainable development Organizers Sari Agricultural Sciences and Natural Resources University Research Center for Ecology and Environment of Central Asia, Chinese…