Ecosystem services are significantly important for human being. However, little attention has been paid to the ecosystem services in rocky desertiifcation areas. In this study, InVSET (Integrated Valuation of Environmental Services and Tradeoffs) model was used to evaluate ecosystem services, in terms of water yield module, sediment retention module and carbon storage module, in a typical rocky desertiifcation area, Qinglong County. The relationship between rocky desertiifcation classiifcation and ecosystem services scoring were also analyzed for further understanding of the specificity related to rocky desertiifcation ecosystem services, with the support of GIS. The results show that: between 2003 and 2013, the quantity change, rather than the spatial distribution change, was the major transformation among the three ecosystem services. The water yield service tended to decline because of precipitation decrease and evapotranspiration increase. The soil conservation service trended to increase due to the decreased rainfall erosivity. And the carbon conservation didn't change obviously. In addition, regions covered by all the three ecosystem services only account for 0.01% of the total area, while those affected by single ecosystem service took the majority. The land for human living activities mainly located in areas where rare ecosystem service covers, and environmental ecosystem services of these areas were the worst as a result of destruction of environment ecosystem. Moreover, regions of potential and mild rocky desertiifcation possessed the best ecosystem services owing to the low-level rocky desertiifcation and the rare interference of human activities in these areas. On the contrary, ecosystem services in the regions with intense rocky desertification was the worst as a result of human over-exploited in non-rocky desertiifcation areas. Our study indicates that the InVEST model can assess ecosystem services in rocky desertiifcation areas effectively. The measures of restoring the ecological damages in non-rocky desertiifcation areas, protecting ecosystem in potential as well as mild rocky desertiifcation areas, and governing middle or intense rocky desertification areas are significantly beneficial in improving the environment ecosystem of rocky desertiifcation areas.
ecosystem servicesInVSET modelrocky desertiifcation area
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