An Improved Dynamic Evaluation Model and Land Ecosystem Service Values for Fuzhou City
Ecosystem services refer to the goods and services that ecosystem provide to us. They can be used to evaluate environmental quality and provide scientific evidence in decision making. Many evaluations of ecosystem services have been done, but the integrated impacts of temporal, spatial, and social factors on the estimation methods of ecosystem service values are rarely considered. Here, estimation methods of ecosystem service values are summarized and classified. According to our review, we suggest that spatial heterogeneity, social development level and resource scarcity be taken into account in ecosystem service evaluation models. We therefore develop an improved dynamic evaluation model including these three coefficients and apply it to Fuzhou. The ecological functions and ecosystem service values of each county were assessed using the Costanza method and our improved method. We refer to ecosystem service values from the Costanza method as 'static' values, and from our improved method as 'dynamic' values. The results show that the annual static value of land ecosystem services in the city is 38.948 billion CNY, equal to 14.77% of local GDP in 2009; the annual dynamic value is 27.032 billion CNY, equal to 10.25% of the local GDP in 2009. Among the nine administrative districts, the unit area dynamic value of urban area is the highest. This pattern is different from the static values, but the rank of the unit area dynamic value in the nine administrative districts is in line with the ranking of land price. The application of our model shows that it provides timely, exact and helpful information when making decisions concerning ecosystem conservation and social development. This new model will have practical significance for ecosystem construction and environmental protection.
Fuzhou CityLand ecosystem servicesDynamic value modelEngel's coefficientPopulation density
NETL
NSTL
万方数据
维普
