This study seeks to scientifically verify the actual effect of a marine ecological restoration project; according to the problems reflected in the assessment, the ecological restoration project can be corrected in time. This study constructs an assessment index system of marine ecological restoration effect from three aspects of ecological environment, social, and economic benefits, and uses the analytic hierarchy process (AHP) to determine the index weight. Taking the Pulandian Bay ecological restoration project and the Daling River estuary ecological restoration project as examples, the application analysis was carried out. The results showed that the Pulandian Bay project scored 77.18 and the restoration effect was ‘good’, while the Daling River estuary project scored 80.19 and the restoration effect was ‘excellent’. Both achieved the effects of improving the regional ecological environment, improving ecosystem service functions, improving the quality of life of residents, and driving regional economic development. The assessment method adopted not only reflects the impact of ecological restoration on the ecological environment and economic society but also visually displays the benefits of the project, reflecting the contribution of the ecosystem to human well-being, which can provide a reference for the evaluation of similar marine ecological restoration projects.

Research on the ecological vulnerability of islands can identify ecologically fragile areas, thereby providing support for the refined management of the ecological and environmental protection of islands and the rational development and utilization of island spaces. Using the ecosystem of Juehua Island (China) in Liaodong Bay and its surrounding marine regions as the study target, this work develops an ecological vulnerability index system for island sea areas based on the VSD model. The analytic hierarchy approach is used to calculate the weights of the indices, and the geographical pattern, zoning, and driving reasons for the ecological vulnerability of Juehua Island and its marine regions in 2019 are investigated. The findings indicate that the regional distribution of ecological vulnerability on Juehua Island varies greatly. In general, the vulnerability of the island land is spatially distributed as “high around and low in the middle”, with the surrounding sea region being non-vulnerable. The regional distribution of ecological vulnerability has considerable spatial agglomeration properties. The ecological vulnerability in the research region is primarily driven by the net primary production of the island land and the environmental quality of the marine water. Furthermore, specific ideas and strategies for the overall administration of Juehua Island have been proposed.