Spatial Differences on Ecosystem Value of Land Cover Types in Changde City
基于地统计学分析常德市不同土地覆盖类型的生态系统服务价值空间差异，发现价值从西向东递减，局部呈块状分布，可为土地结构调整提供参考。
Different land cover types lead to the changes of land surface structure and exert a big influence on the supply of land ecosystem service by changing the structure and function of the ecological system.On the basis of Geostatistics,the nature and effect of the spatial differences of the ecosystem service value are analyzed.The results indicate:①the evaluation on the value of ecosystem services in Changde City is about 24 636.17 × 106 yuan / year.②Kriging Interpolation Model can describe and analyze the spatial distribution pattern and accurately reflect the nature of the regional spatial differences.the overall trend of spatial variation on the value of ecosystem services in Changde City showed a trend from west to east,while some areas are showing a massive distribution,and outward expansion by the local regional center to show the variations trend from low to high.③Geostatistics is applied so as to simulate the spatial consecutive distribution pattern of the regional variations.The characteristics of regional variations have been taken into consideration.Hence,the nature of spatial variations of ecological service and function service can be analyzed and reflected.④The differences of ecological service and function value cannot justify the rationality of the land use in Changde City.However,such changes reflect the impact of the land cover changes on the land ecological service value,which can help to readjust the land structure and utilize the land in a rational way.