土地利用变化对生态系统服务价值的影响--以贵州省为例

Effects of Land Use Variations on Ecosystem Services Value——A Case Study in Guizhou Province

土地利用变化下区域生态系统服务价值动态变化研究,为区域土地利用规划、生态环境保护和生态恢复提供了科学依据。近17 a来贵州省土地利用状况发生较大的变化,研究此条件下生态系统服务价值的变化,可为区域生态修复、治理、重建以及土地利用管理决策提供依据。本文对照中国陆地生态系统单位面积服务价值表,根据相应的土地利用类型划分,估算了贵州各土地利用类型生态价值系数;利用4个时期的土地利用数据,在计算结果的基础上分析了全省土地利用变化状况。结合土地利用变化数据和各土地利用类型生态价值系数,测算了全省各类生态系统服务价值量和全省总生态系统服务价值量。结果表明,全省近17 a来总生态系统服务价值量稳步增加,主要得益于林地的增加,农田的增加对生态系统服务价值量的增加也起到了一定的作用。表明全省生态建设总体上取得了明显成效,生态环境恶化的状况有所好转。

It is of importance to study the dynamic variations of regional ecosystem service value under the variations of land use it will provide scientific references for regional land use planning, econvironmental protection and eco-recovery. In recent 17 years, there existed significant changes of land use in Guizhou Province. Researches on the variations of ecosystem service value changing under the conditions will provide references for eco-restoration, rebuilding and decision making on land use management in the province. Consulting ecosystem service valuation on terrene ecosystems in China provided by Gaodi Xie etc, according to corresponding land use classification, ecological value coefficient of each land use type in Guizhou was calculated. With land use data of four periods, based on computation, analysis on land use change in this region was carried out. Combined land use change data and ecological value coefficient of each land use type, calculation of ecosystem service value of each ecosystem and the total ecological service value in Guizhou was performed. All the results showed a steady increase of ecosystem service value in this region, which was mainly contributed by the increment of forests. Meanwhile, farmland increase played an important role in this trend. The trend informed a visible achievement of eco-restoration and rebuilding, and the degradation trend of eco-environmental in this area was held back.