焉耆盆地土地利用变化对生态服务价值的影响

Effects of Land Use Change on Ecosystem Service Value in Yanqi Basin

基于1990年、2000年和2011年卫星遥感资料,采用中国陆地生态系统的服务价值测算方法,分析了新疆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。结果表明:(1)焉耆盆地在1990—2011年间土地利用变化很明显;(2)焉耆盆地生态服务价值从1990年的821 400.0万元增加到2011年的867 300.0万元,生态服务价值增加了5.59%,达45 900.0万元,每年净增加生态服务价值达30.23元/hm2。生态系统服务总价值的增加主要来自水域、湿地总面积的增加,草地生态服务价值变动最大,其变化率高达14.94%;(3)研究区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;(4)敏感性分析结果表明,焉耆盆地生态服务价值对生态服务功能指数是缺乏弹性的,研究结果是可信的。

The effects of land use change on ecosystem service value and functions in Yanqi Basin,Xinjiang Ughur Autonomous Region were analyzed using romote sensing data in 1990,2000 and 2011,and the evaluation method of terrestrial ecosystem services value of China.The results indicated that：（1） intensive land use change has happened in Yanqi Basin within 1990—2011;（2） the total ecosystem services value increased from 8 214.0 million Yuan in 1990 to 8 673.0 million Yuan in 2011,it increased 5.59%,about 459.0 million Yuan.The yearly net increase of ecosystem service value was about 30.23 Yuan per hectare.The increase of total ecosystem services value was resulted from the increase of total area of water bodies and wetland.The changes of the ecosystem services value provided by grassland were the highest,it changed about 14.94%;（3） the overall rank order for each ecosystem functions based on their contributions to the total ecosystem services value of the area was as follows（from high to low）： waste treatment,water supply,climate regulation,recreation and culture,biodiversity protection,soil formation,food production,gas regulation,and raw material;（4） results of sensitivity analysis showed that the ecosystem services value estimated in Yanqi Basin was relatively inelastic with respect to the value coefficients,and the results of the study was reliable.