资源型城市土地利用变化对生态系统服务价值的影响——以安徽省淮南市为例

目的]以安徽省淮南市为例,探讨资源型城市土地利用变化对生态系统服务价值的影响,为该市生态、经济、生态环境保护以及今后进行城市开发建设和农业发展提供科学参考。方法]基于土地利用变化和生态系统服务价值评估的相关理论和方法,运用GIS软件,分析淮南市2000和2010年土地利用变化,并计算淮南市生态系统服务价值,研究土地利用变化对生态系统服务价值的影响。结果]2000—2010年淮南市土地利用变化较大,主要土地类型以耕地、居民地及工矿用地和水域为主。土地利用结构发生变化,出现耕地、林地减少,水域、居民地及工矿用地、草地增加的现象。研究区生态系统服务价值总量呈减少的趋势,从2000年的11.72亿元减少到2010年的11.33亿元,减幅达3.33%。单位面积生态系统服务价值的分布变化也与研究区土地利用变化紧密相关,居民地及工矿用地的增加是造成生态系统服务价值减少的最主要原因。生态系统服务价值对生态价值系数的敏感性指数均小于1,说明研究区内的生态系统服务价值缺乏弹性,研究结果是可信的。结论]淮南市应高度重视土地利用变化对生态系统服务价值的影响,优化调整土地利用结构,注重增加生态用地,稳步提升区域生态系统服务价值。

Impacts of Land Use Change on Ecosystem Service Value in Resource-based Cities-A Case Study of Huainan City of Anhui Province

Objective] Taking Huainan City of Anhui Province as an example, this paper discussed the influence of land use change on the ecosystem service value in the resource-based cities, in order to provide scientific references for the city''s ecological, economic, ecological environment protection, the future exploitation and construction of the city, and the development of agriculture as well.Methods] Based on related studies on land use and the method of ecosystem service value assessment, using GIS technology, this paper analyzed the land use changes of Huainan City from 2000 to 2010 and calculated ecosystem service value to study how ecosystem service value changed with the land use.Results] The changes of land uses in Huainan City were significant from 2000 to 2010, among which, the areas of cropland, settlement land, industrial and mining land, and water got remarkable changes. Total ecosystem service value of the study area increased from about 1.172 billion yuan in 2000 to about 1.133 billion yuan in 2010, which showed an decreasing tendency with a percentage of 3.33%. The land use structure had changed, of which the cropland and woodland had reduced, settlement land, industrial and mining land, and water area had increased. The sensitivity analysis showed that the ecosystem service value(ESV)lacked of flexibility, indicating that the results of ecosystem service value evaluation are reliable.Conclusion] Huainan City should attach great importance to the impact of land use change on the value of ecosystem services, optimize the structure of land use, pay more attention to the increase of ecological land, and steadily improve the value of regional ecosystem services.