陕西省神木县土地利用格局和生态服务价值变化

在对土地利用信息提取的基础上,运用土地利用变化强度、动态度、土地利用程度、生态系统服务价值对陕西省神木县土地利用时空演变特征及其生态响应进行了分析。结果表明,2000-2010年神木县土地利用类型转换较快,土地利用程度明显减弱,耕地、草地、林地、水域、工矿用地、建设用地和未利用土地的变化强度分别达到-1.687%,0.782%,0.469%,-0.033%,0.067%,0.086%和0.316%。2000-2010年神木县生态系统服务价值呈增长态势,10 a间增加了0.94亿元,同期耕地生态价值减少了3.95亿元,林地和草地分别增加了3.47和1.92亿元,而水域和未利用土地的生态价值变化不大。空间上,北部乡镇生态系统服务价值以下降为主,而南部乡镇以增长为主。

Land Use Patterns and Ecosystem Service Values Change in Shenmu County of Shaanxi Province

Taking the TM images in 2000 and 2010 as data resource, combined with land use change quantity analytical method and GIS and RS technology, the authors analyzed land use changes and its ecological response in Shenmu County of Shaanxi Province from 2000 to 2010 by adopting the comprehensive land using dynamic degree, land use degree and ecosystem services value(ESV). The result showed that the land use patterns transformed quickly and land use degree reduced in Shenmu County from 2000 to 2010, in which the intensity of land use change of cultivated land, grassland, woodland, water area, industrial land, urban construction and unutilized land reached-1.687%, 0.782%, 0.469%,-0.033%, 0.067%, 0.086%, and 0.316%, respectively. Total value of ecosystem services increased 94 million yuan in Shenmu County from 2000 to 2010. Meanwhile, the ESV of woodland and grassland increased by 347 million yuan and 192 million yuan respectively. On the contrary, the ESV of cultivated land decreased by 395 million yuan, and water area and unutilized land had the smallest change. Spatially, total value of ecosystem services in the northern township mainly declined, at the same time, in southern township, it mainly rose.