基于土地利用—生态系统耦合模型的生态系统服务价值评估——以中国北方农牧交错带为例  

Evaluation of Ecosystem Service Value Based on Land Use-Terrestrial Ecosystem Coupled Model —A Case Study From the Farming-Grazing Transitional Zone of Northern China

作　　者：蒋力[1] 徐霞[1] 刘颖慧[2] 徐粒[1] 田玉强[1] 

机构地区：[1]北京师范大学地表过程与资源生态国家重点实验室,北京100875 [2]北京师范大学资源学院,北京100875

出　　处：《天津农业科学》2014年第1期74-81,共8页Tianjin Agricultural Sciences

基　　金：国家自然科学基金项目(41030535);国家自然科学基金项目(30900197);国家973项目(2011CB952001)

摘　　要：土地利用是人地系统的重要组成部分,能够提供巨大的生态服务功能,它的变化也会导致生态服务价值的改变。考虑初级生产、维持CO2和O2平衡、养分循环、涵养水源、土壤侵蚀等主要服务功能,以我国北方农牧交错带为研究对象,提出了一个基于土地利用生态系统耦合模型的土地利用生态系统服务价值估算方法。估算结果表明,20世纪70年代—2000年我国北方农牧交错带生态系统总服务价值呈先下降后回升趋势,由1 434亿元降低到1 296亿元。土地利用数量结构和空间格局对生态服务价值也有较大影响,其中耕地和草地的贡献率最大,2000年分别达31%和44%;林地虽然所占面积小,但其生态服务价值比重也不断上升。总体来看,研究区还需进一步加强生态环境的可持续性保护。Land use is an important part of the human-earth system,it can provide huge ecosystem services. This paper considered the primary production,the balance of CO2 and O2,nutrient cycling,water conservation,soil erosion control and other major service functions,and proposed a method based on land use- terrestrial ecosystem coupled model to estimate the land use ecosystem service value. The results show that during 1970s—2000,the total ecosystem service value of the farming-grazing transitional zone of northern China has been changed from the 143.4 billion yuan to 129.6 billion yuan RMB lower after recovering from declines in 1990s. The land use structure and spatial pattern has an impact on the value of ecosystem services. The cropland and grassland ecosystem offered the main ecosystem service value,being 31% and 44% respectively. And the proportion of the ecosystem services value in forest ecosystem has continued to rise although it＇s small size. We should further strengthen the protection of ecological environment.

关 键 词：LUCC变化 生态服务价值 中国北方农牧交错带 

分 类 号：F323.22[经济管理—产业经济]