关键词: 土地利用, 可溶性有机碳, 挠力河, 湿地

Abstract: Under the background of the sharp decline of global ecosystem services level, land use change alters the structure and function of ecosystem, and further, affects the supply of ecosystem services and the human well-being. Taking Ningwu County as the study area and by using land use intensity index, this paper analyzed the regional land use change processes. In the meantime, an ecosystem services evaluation model for the earth-rock mountainous area of Loess Plateau was constructed through combining the material and value assessment methods, and the coupling changes between land systems and ecosystems were analyzed by statistical analysis methods, aimed to provide scientific support for the promotion of land use, ecological restoration, and human well-being in the earth-rock mountainous area of Loess Plateau. The results showed that in 2001-2011, with the promotion of land use intensity, the total ecosystem services value in the County increased yearly, from 5.58 billion yuan (RMB) in 2001 to 6.32 billion yuan  in 2011, with an increment of 13.4%. The regional land use change processes were mainly affected by the provision  services and cultural services. Land use intensity had a close correlation with the provision and cultural services, but poor correlation with regulation services and supporting services.

Key words: land use, dissolved organic carbon, Naoli River, wetland.