Measurement Of Forest Ecosystem Service Value And Analysis Of Its Spatial-temporal Differentiation In Zhejing Province

This research studies the forest ecosystem service value of Zhejiang’s forest ecosystem of2010based on remote sensing data, meteorological data, statistics data, and so on. On the basis of five types of forest ecosystem service value, their spatial-temporal differentiation is analyzed.Firstly, the high accurate land cover mapping of Zhejiang province of2010is completed using the object-oriented method. The mainly data used in this process contains the results of the pre-processed Landsat TM, DEM, and so on. Secondly, the NPP of each month of2010is retrieved, and verified using the measured data in the references. The mainly data used in this process contains the data of MOD13A1, the data from meteorology stations and from radiation stations, and the map of land cover of Zhejiang. After that, the value of carbon sequestration, oxygen release, organic production, and nutrient recycling of Zhejiang’s forest with500m resolution are computed monthly based on NPP. The value of water conservation of Zhejiang’s forest with500m resolution is computed monthly based on precipitation and evapotranspiration. The value of soil conservation of Zhejiang’s forest with500m resolution is computed monthly based on the Universal Soil Loss Equation. Finally, the composition, temporal differentiation, spatial differentiation of Zhejiang’s ESV is analyzed.By the research, we not only computed several kinds of forest ESV, but also discovered some change patterns of these kinds of forest ESV. The mainly results and conclusions are listed below.The analysis of the composition of the five kinds of forest ESV implies that, the forest ecosystem service value occupies very important position in the green GDP. There are obvious differences among the value per unit area of forest ESV which is provided by different forest ecosystems. Furthermore, with the changes of environment and climate factor, the amounts of all types of forest ecosystems’ESV vary in different months.The analysis of temporal differentiation of forest ESV indicates that, a certain forest ESV change with its particular property, and a certain forest ESV of evergreen boarded-leaf forest and evergreen neddled-leaf forest change similarly. All the change patterns can be simulated using parabolic splines.The analysis of the spatial differentiation of forest ESV also imply that, there is a huge difference among forest ESVs of different cities in Zhejiang in2010, and there are obvious correlations between the per-unit-area-ESV, and the forest type, the per-unit-area GDP, the elevation, and the slop. By studying the correlations between the per-unit-area-value of forest and elevation, slop, we can maximize the forest ESV in Zhejiang province under the condition of the area is limited, and improve the ecological compensation mechanism.