渭河关中段土地利用变化对生态系统服务价值的影响

Effects of Land Use Change on Ecosystem Service Value in Guanzhong Section of Weihe River

[目的]评估渭河关中段土地利用变化引起的生态系统服务价值变化,为渭河关中段生态系统可持续发展的决策提供依据与手段。[方法]根据渭河关中段的土地利用变化数据,采用中国陆地生态系统的服务价值测算方法,对渭河关中段的生态系统服务价值进行评价,并分析了面积变化对生态系统服务价值的影响。[结果]1980~2007年渭河关中段水域面积呈减小趋势,林地面积及建设用地面积均在增加,而未利用地面积在减少,耕地面积变化不大;1980~2007年生态系统服务价值减少了8.37亿元,主要是由于水域面积减少和城市建设用地面积增加引起;林地和草地对生态系统服务价值的贡献最大,单位生态系统服务价值水域最大。[结论]在渭河关中段建设和产业发展过程中,应加强对林地和水域的保护。

[Objective] The aim was to evaluate ecosystem service value change caused by land use change and provide reference for policymaking of sustainable development of ecosystem in Guanzhong section of Weihe River. [Method] According to land use change data in Guanzhong section of Weihe River,using service value calculation method of terrestrial ecosystem in China,ecosystem service value in Guanzhong section of Weihe River was evaluated,effects of area change on ecosystem service value were analyzed. [Result] During 1980-2007 the water area in Guanzhong section of Weihe River showed a decreasing trend,while the area of forest land and construction land were increasing,the unused land area was decreasing,and the cultivated land area changed little. Due to decreasing of water area and increasing of construction land area,ecosystem service value during 1980- 2007 reduced 0. 837 billion; the contribution of forest land and grassland to ecosystem service value was the biggest; water area had the maximum unit ecosystem service value. [Conclusion]In construction and industrial development process of Guanzhong section in Weihe River,protection of forest land and water area should be strengthened.