Based on the existing concepts of marine ecosystem service, functional services of marine ecosystem and its valuation were discussed in this paper. According to its characteristics, functions and value assessment methed, marine ecosystem service can be further classified into four types. They are provision service, regulation service, cultural service and supporting service. The comprehensive evaluating indicator of valued marine ecosys- tem aims to provide scientific evidences for exploration and sufficient exploration of ocean resources, and provide scientific basis and data support for marine ecosystem value assessment.
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