铜川市土地利用变化对生态系统服务价值的影响分析

土地利用类型及其结构的变化引起各类生态系统服务功能价值发生相应变化,应用Constanza生态系统服务价值计算公式,采用谢高地等人的中国陆地生态系统单位面积生态服务价值表,分析了2006-2011年铜川市土地利用的时空变化以及由此导致的生态系统服务价值的时空变化,并运用灰色系统分析方法对各土地利用类型与生态系统服务价值量变化的相关性进行了定量研究.结果表明:研究期内,研究区耕地、林地和建设用地增加,林地增加最多,而草地和未利用地急剧减少;研究区内土地利用程度存在明显的空间差异,其中王益区土地利用程度最大,宜君县最小;生态系统服务价值总量以及各类生态系统服务类型的价值量均呈上升趋势;关联度计算表明,研究区建设用地和林地的生态系统服务价值对生态系统服务价值总量的影响最大.

Analysis on Impacts of Land Use Changes on Ecosystem Service Value in Tongchuan City

The changes in land use structure and type would impact the appropriate changes of ecosystem service value(ESV). Based on the Constanza’s ecosystem service value theory and using the coefficients advanced by Xie Gao-di and co-works, who made a table listing the ESV of unit area in land ecosystem and providing the average unit price of ESV in China, the spatial-temporal changes of land use was analyzed and their effects on the spatial-temporal changes of ESV was examined. Also, gray Association was used to calculate the correlation between the land use type and ESV quantitatively. The following results and conclusions could be obtained. During the study period, the area of cultivated land, woodland and construction land increased, and woodland increased greatly; while grassland and unutilized land decreased sharply. There exist significant differences in land use extent. And the extent of Wangyi District was largest, while Yijun County was least. Gross ESV and the value of different kinds of ecosystem services increased. By calculating the relational degree, it indiciated that ESV of construction land and woodland played the most important role in gross ESV.