基于3S的焉耆盆地生态服务价值对土地利用变化的响应

基于3S技术,采用我国陆地生态系统的服务价值测算方法,利用1990、2000与2011年卫星遥感图,分析了焉耆盆地土地利用变化对生态系统服务价值与结构的影响。研究结果显示:①焉耆盆地在1990～2011年间土地利用变化很明显;②生态服务价值从1990年的952 881万元增加到2011年的1 012 946万元,生态服务价值增加了6.30%,达60 065万元。生态服务总价值的增加主要是由水体和耕地总面积的增加而导致的;③各生态服务功能对区域总生态服务价值贡献率由高到低依次为废物处理、水源涵养、气候调节、娱乐休闲、生物多样性保护、土壤形成、食物生产、气体调节和原材料。研究区生态服务价值对生态服务功能价值指数是缺乏弹性的,研究结果是可靠的。

The Response of Ecosystem Services Value to Land Use Change in Karashahar Basin Based on 3S Technology

The effects of land use change on the ecosystem services value and structure in Yanqi Basin were analyzed based on 3S technology,applying the terrestrial ecosystem service value in China and using satellite remote-sensing images of 1990,2000 and 2011.Results of the study showed that: ① There was obvious land use changes in Yanqi Basin during 1990-2011;② Ecosystem services value increased from 9 528.8 M Yuan in 1990 to 10 129.5 M Yuan in 2011.Ecosystem services value increased 6.30%,up to 600.7 M Yuan.The increase of the total ecosystem services value was caused mainly by the increase of the total area of waterbody and farmland;③ The overall rank order for each ecosystem function based on their contributions to overall value of ecosystem services was that the contribution of the waste treatment function was the highest,then the water supply,climate regulation,recreation and culture,biodiversity protection,soil formation,food production,gas regulation and raw materials.The total ecosystem services value was relatively inelastic to the value coefficients,therefore,the estimation in this study area was robust in spite of uncertainties on the value coefficients.