常德市土地覆被的生态服务价值空间变异分析

不同土地覆被类型形成不同的生态系统的结构与功能,对土地生态系统服务的供应产生影响。基于地统计学分析方法研究常德市土地覆被类型生态系统服务价值的空间分异规律和影响。结果表明:①常德市生态服务价值约为24 636.17×106元/年。②常德市生态服务功能价值空间分异的总体趋势呈现西高东低的趋势,同时局部地区也呈现出块状的分布,由局部地区中心向外拓展表现出由低到高的变异趋势。③模拟区域化变量的空间连续分布格局,能够很好地研究和反映生态服务功能价值的空间变异规律。④生态功能服务价值分异不能推断常德市土地利用的合理性,但可从这种变化中体现土地覆被的变化对土地生态服务价值的影响,可以指导调整土地结构和合理利用土地。

Spatial Differences on Ecosystem Value of Land Cover Types in Changde City

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.