Transformation system of ecological system service value in China′s national parks

The value realization mechanism of ecological products is an important mechanism for ecological protection to promote green development.The contradiction between the unlimited and multi-level social ecological demand and the limited ecological supply of national parks needs to be balanced through the establishment of market mechanism. The theory of value exchange and ecological resilience is the theoretical basis for realizing the ecological service value of national parks. The classification system of ecological service products of national park was established from the perspective of social ecological demand, which laid the foundation for the refined balance of supply and demand of national park ecological service products, so as to supply according to demand and guide supply according to demand. Characteristics, times, public welfare and sustainability are the basic principles for the value transformation of ecological products of national parks. The value transformation of ecological products of national parks is characterized by four dimensions, namely time, space, type and level. The basic transformation system consists of five levels and three categories, which vary from time to time and with different capital input. Material, spiritual and knowledge products are three types of ecological service products that reflect the characteristics of national parks. Public, quasi-public and operational are the three basic attributes of ecological service products of national parks. Spatial gradient and transformation efficiency are important evaluation indicators of the realization degree and quality of the value of ecological products. It is also an important basis for the rationality of national park control zoning and functional zoning and its management performance evaluation.