摘要
以1999年、2006年、2013年3年期青海省土地利用变更调查数据为基础,采用生态系统服务价值定量评估模型、土地利用动态度及敏感性指数对青海省土地利用变化情况及其对生态系统服务价值的影响情况进行分析。结果表明:(1)1999—2013年间,青海省林地、牧草地、园地及建设用地呈增长趋势;耕地、水域及未利用土地呈减少趋势。(2)区域生态系统服务总价值总体呈现出增长趋势,由1999年的4 477.29×108元提高至2013年的4 507.07×108元。研究期间,牧草地、林地、水域面积变化对区域生态系统服务价值起着决定性的作用,3类土地利用类型生态服务价值占总价值的96%以上。(3)各项生态系统服务功能中,水源涵养、土壤形成与保护及废物处理功能贡献率最大,表明青海省生态系统的服务性功能远高于生产性功能。(4)研究区生态系统服务价值对生态服务价值系数缺乏弹性,研究结果具有可信性。
Based on the land use change data in 1999,2006 and 2013 of Qinghai Province,and by the evaluation of land use dynamic index,ecosystem service values,coefficient of sensitivity,this paper analyzed the changes of ecosystem services value and explored the responses of ecosystem services value change to land use change in Qinghai Province. The result shows that during this period,the area of forest land grassland orchard and construction land increased. However,cultivated land,water area and unused land decreased. The ecosystem services value increased from 4 477. 29 billion yuan in 1999 to 4 507. 07 billion yuan in 2013. For the structure of ecosystem services,the grassland,forest and water area made the greatest contributions to the total ecosystem services value of the study region. The accumulative ecosystem services value of three land use types accounted for over 96% of the total value in Qinghai Province. The water supply,soil formation and protection,waste treatment made the biggest contribution,while the contribution rates of raw material and food production were under 5%,indicating that the services functions was much larger than the productive function. Sensitivity analysis indicated that the estimated total ecosystem services value in the study area was inelastic to the services value coefficients,and the results obtained in this study were scientifically sound.
出处
《干旱地区农业研究》
CSCD
北大核心
2016年第3期254-260,共7页
Agricultural Research in the Arid Areas
基金
中央高校基本科研业务费优秀教师基金项目资助(2-9-2015-173)
关键词
土地利用
生态系统
服务价值
青海省
land use change
ecosystem services value
Qinghai Province
