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| Temporal and spatial characteristics of land use and ecosystem services in the Loess Plateau |
| Received:January 31, 2020 |
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| KeyWord:land use change;water conservation;soil conservation;sand fixation;Loess Plateau |
| Author Name | Affiliation | E-mail | | NING Jia | Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China | | | SHAO Quan-qin | Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China | shaoqq@igsnrr.ac.cn |
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| Abstract: |
| The study of the impact and interaction mechanism of land-use change on ecosystem is an important support for a comprehensive and scientific understanding of the response of ecosystem to human activities and global climate change. In this paper, the Loess Plateau, a typical area of land use change in China, is selected as the research area. Based on the collection of relevant remote sensing data, the main ecosystem services such as water conservation, soil conservation, windbreak and sand fixation in the Loess Plateau from 2000 to 2015 are estimated by using the methods of precipitation storage, Revised Universal Soil Loss Equation(RUSLE)and Revised Wind Erosion Equation(RWEQ). The main ecosystem services from 2000 to 2015 are analyzed. Based on the spatial-temporal characteristics of land use and ecosystem services in the Loess Plateau, the following conclusions are drawn:the intensity and scope of land use change in the Loess Plateau from 2000 to 2010 are relatively large, mainly in terms of returning farmland to forest and grass; the overall land use change slows down from 2010 to 2015, mainly in terms of urbanization, supplemented by returning farmland to forest and grass; compared with 2000-2010, in 2011-2015, the amount of water conservation and soil conservation in the Loess Plateau increased, the amount of wind break and sand fixation decreased, and the modulus of water erosion and wind erosion decreased; the driving factors of land use change in the Loess Plateau are mainly human activities such as national policies, and the interannual change of ecosystem services is mainly due to the fluctuation of climate factors such as temperature and precipitation, which is ten years or longer change is due to the dual effects of global climate change and land use change. Through this study, we can better reveal the process and law of human and land system and climate system change, which is conducive to the healthy development of the Loess Plateau ecosystem in the future. |
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