Valuation of Nansihu Lake Wetland Ecosystem Services Based on Multi-Sources Data Fusion
Wetlands are one of the three great ecological systems on earth.With a deepening of research on wetland ecosystems,researchers have paid more and more attention on wetland comprehensive eco-environmental and productive services in terms of flood mitigation,climate control,pollution prevention,soil-erosion reduction,environment beautification,biodiversity maintenance,and bio-productivity protection.Here,we focus on the Nasihu wetland ecological system and estimate the value of ecosystem services such as material production,atmosphere regulation,water retention ability,flood control,recreation service,culture and scientific research,nutrient cycling and wild species habitat based on landscape data through interpreting high-definition images and NPP data processed by MODIS.We adopted the market value method,carbon tax and afforestation cost method,shadow engineering method,cost method,substitution expense,expert method and other methods.Results show that the total value of the ecosystem services of the wetland was 13.1billion CNY every year.Among these services,regulating function had the maximal value of 5.677 billion CNY per year,followed by support function and cultural function (5.277 billion CNY and 1.507 billion CNY per year respectively).The supply function had the lowest value of 0.639 billion CNY per year.Although the area of artificial wetland was at one time more than that of natural wetland,the ecological service value of the artificial accounts for more than 59％ of the total wetland.When considering the wetland for economic development,other functions must be considered in addition to material production to arrive at a longer-term economic value.
NETL
NSTL
万方数据
维普
