元谋干热河谷土地利用变化对生态系统服务价值的影响(简报)

为了研究土地利用变化对区域生态系统服务价值的影响,该文以金沙江干熟河谷的元谋县为例,采用遥感与地理信息系统技术,利用LANDSAT TM影像,分析从1986～2000年间的土地利用变化情况,根据谢高地的生态服务价值系数对区域土地利用类型的生态系统服务价值进行评估,并对其进行了敏感系数(CS)分析.结果表明:研究区在1986～2000年之间,耕地、草地、水域和未利用土地面积均呈现减少的趋势,而林地和建设用地面积呈增加趋势;元谋县2000年的生态系统服务价值比1986年有所提高,土地利用变化使研究区生态资产增加了0.0399亿元,这主要是林地面积增加以及林地的生态价值系数最高的原因所至;敏感性系数分析表明本研究采用的谢高地生态价值系数是合理的.

Effects of land use change on ecosystem service value in Yuanmou dry-hot valley

In order to study the effects of land use change on ecosystem service values, change of land use in Yuanmou County from 1986 to 2000 was analyzed by use of the LANDSAT TM images and remote sensing and geographic information system. Ecosystem service coefficients of different land use types in the study area was estimated based on them found by Xie Gaodi and the ecosystem services sensitivity analysis was conducted to determine whether these coefficients can be used in the study area or not. The results show that the estimated area of cultivated land, pasture land, water area and unused land decreased but that of forest land and construction land increased from 1986 to 2005. The total ecosystem services value in the study area in 2000 is higher of 3989736.42 Yuan than that in 1986 for the increase of forest land area and its highest ecosystem services coefficients. It can be concluded that ecosystem service value is determined by land use type. The coefficient sensitivity(CS) of the study indicates that it is reasonable for the coefficient to be used in the study area.