The Xiamen Symposium on Marine Environmental Sciences (XMAS 2025)

Under the background of high-quality economic and social development, China's coastal regions face significant challenges in marine ecological and environmental protection. As key drivers of economic growth, these coastal areas are under considerable marine environmental stress due to factors such as industrialization, urbanization, overexploitation of resources, and marine engineering projects. These stresses have led to increasingly severe issues such as marine pollution, biological invasions, and ecosystem degradation. Research indicates that there is significant spatial heterogeneity in economic, social, environmental stress, and ecological risks across coastal regions. For example, eastern and southern provinces like Guangdong, Shandong, and Jiangsu have higher populations and GDP, while northern coastal provinces have larger areas of reclaimed land. Provinces such as Hebei, Liaoning, Jiangsu, Hainan, and Guangdong experience higher environmental stress under the blue economy's value framework, with lower environmental efficiency in economic growth. By constructing an input-output model, the study evaluates the efficiency of marine resource utilization in these coastal provinces, revealing differences in resource use and environmental protection across provinces, providing scientific support for the high-quality economic and social development of coastal regions.