西南山区生态敏感区生态服务价值对土地利用变化的响应——以重庆市万州区为例

Response of Ecological Services Value to Land Use Change in Southwest Mountainous Ecological Sensitive Area——A Case Study of Wanzhou District,Chongqing City

生态系统服务价值评估是当前土地科学研究的热点问题之一.本文以重庆市万州区为研究区,依据2000—2008年土地变更调查资料,采用Costanza生态系统服务价值计算公式,运用生态经济学方法,分析了研究区生态系统服务功能对土地利用变化的响应.研究结果表明:研究区在2000—2008年间,农田、园地、湿地、未利用地均减少,林地、草地、水域、城镇用地、道路用地均增加.研究期内生态系统服务价值总体有所上升,从355.19×107元上升到418.2×107元,增加了63.01×107元.农田、林地、水域是生态系统服务价值构成中贡献最大的土地利用类型,占到生态系统服务价值的95%以上,对整个区域生态服务价值的变化起着决定作用.研究区生态建设与经济发展已处于低度协调的边缘,区域未来的发展必须重视对生态环境的治理和保护.

The valuation of ecosystem services is one of the hot issues in the current land science.Taking Wanzhou District in Chongqing as the study area,on the basis of land change survey data from 2000to2008,with Costanza method and ecological theory,this paper has analyzed the effects of land-use change on ecological service value in the study area.The results show that from 2000 to 2008,farmland,garden land,wetland,unutilized land in study area decreased,while forest land,grassland,water body,urban land,land for roads increased.During 1985-2005,the ecological services exhibited an increasing trend,from 355.19×107 Yuan to 418.2×107 Yuan,increased 63.01×107 Yuan.Farmland,forest land and water body were the land use types that 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 over95% of the total value,indicating that these land-use categories played important and remarkable roles in ecosystem services value in the study region.Ecological construction and economic development in the study area has been on the verge of coordination,the region's future development must attach importance to the governance and protection of ecological environment.