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The Dengsha estuary area is taken as the research area, and the value of marine ecological services is calculated from the perspective of opportunity cost, the exploitability of marine units is analyzed, and the current situation of marine utilization is analyzed and evaluated. By constructing an evaluation model of exploitability and utilization of sea area units, combining with GIS and model formulas, the value of marine ecological services and the exploitability and utilization of each type of sea area in sea area units are calculated. The results showed that: The effective exploitation and utilization of fishery seas in Dengsha estuary ecological zone is basically realized, and the ineffective utilization of industrial and mining seas is the main cause of ecological loss. The layout of Dengsha estuary should be further optimized, and the layout far away from the ecological core area should be adopted to improve the comprehensive benefits of using the sea. Keywords—evaluation model of ecological benefit of sea area utilization; marine spatial planning; ecosystem service value

Analysis on the Exploitability and Utilization of Sea Area Based on ESV: A Case Study of Dengsha Estuary Eco-region