土地利用变化对生态系统服务价值影响——以安徽省明光市为例

Impacts of Land Use Change on Ecosystem Services Value in Mingguang City

基于遥感（RS）和地理信息系统（GIS）技术,以Landsat-TM图像为基本数据,运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以及生态系统服务价值的计算公式,研究安徽省明光市1995～2009年土地利用变化对生态系统服务价值的影响.结果表明：研究期间,耕地（主要指水田）与未利用地面积减少,其他土地利用类型面积均增加.生态系统服务价值由1995年的85.99亿元减少到2009年的83.28亿元,水田面积的减少是总服务价值减少的主要原因,旱地面积的增加补偿了总价值的部分损失,但损失略大于收益.各项生态功能的服务价值对总生态系统服务价值贡献大小的等级基本稳定,其中,废物处理、水源涵养和气候调节能力的贡献率最大.敏感性分析表明,研究区生态系统服务价值对于生态价值系数是缺乏弹性的,各土地利用类型生态系统服务价值敏感性指数均小于1,研究结果是可信的.

Based on the remote sensing images （RS） and geographic inform action system （GIS） technique and LandsatTM data,the impacts of land use change on ecosystem service value in Mingguang City from 1995 to 2009 were studied by the table of Chinese land ecosystem service value （ESV）.of unit area and the ESV computing fomula.Result showed that the area of cultivation land （paddy field） and construction land decreased,but the areas of other land uses increased.The total ecosystem service value dropped from 85.99 × 108yuan in 1995 to 83.28 × 108yuan in 2009,because the areas of paddy field decreased.The increase of dry land area partially offset the loss of the total value,but the loss was still greater than the gain.The contribution of each ecosystem service value to the total ecosystem services value had a less change,and the service value from waste treatment,water conservation with climate regulation contributed most.Sensitivity analysis indicated that the estimated total ecosystem services value in the study area was inelastic to the services value coefficient,the sensitivity index of ecosystem services value for each land use type was less than 1 and therefore,the results are credible.