A review of land use change and its influence in the source region of the Yellow River
CHEN Qiong1,2, ZHANG Yili3,4, LIU Fenggui,1,2, ZHOU Qiang1,2, WANG Shengzhen1, CHENG Yi1, GUO Rong1, ZHI Zemin1, XU Huange11.College of Geographic Sciences, Qinghai Normal University, Xining 810008, China 2.Institute of Plateau Science and Sustainable Development, Xining 810008, China 3.Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China 4.Chinese Academy of Sciences Centerfor Excellence in Tibetan Plateau Earth Sciences, CAS, Beijing 100101, China
Abstract The upstream area of the Yellow River Basin in Qinghai Province is an important component of the national ecological barrier and the “water tower” of China, and a priority area for ecological protection. In this article, a set of relevant studies on land use pattern and process in this area over the past 40 years were reviewed, and the article comprehensively analyzed the current status, changes, and effects of land use and made policy recommendations. We found that: (1) There is a relatively stable land use pattern with grassland as the absolute dominant land-use type in the upstream area of the Yellow River Basin. An important turning point in land use occurred around 2000. Before then, ecological land such as grasslands, woodlands, and wetlands decreased and resulted in adverse effects such as land degradation, soil erosion, and desertification in the region. After 2000, ecological land and vegetation index increased, the ecosystem gradually changed to a healthier direction, and the carbon sink function is enhanced. (2) The implementation of a series of ecological projects and climate change make land use and its effects extremely complex. On the whole, the total area and degree of land degradation decreased to some extent, with grazing resources and livestock population largely balanced. The cultivated land area of the Yellow River-Huangshui River valley in the east has been decreasing, and agricultural intensification has increased significantly with the planting structure gradually optimized. Local deterioration is still severe, especially that soil erosion intensified in the freezing-thawing zone in alpine regions. (3) In the future, it is necessary to further research on the mechanism of ecological effects of land use, the contribution of environmental effects of ecological engineering and natural factors, and ecological service value to better understand the human-environment relationship in this study area. Keywords:source region of Yellow River;land use change;influence;social economy;ecological priority;ecological effect
PDF (4970KB)元数据多维度评价相关文章导出EndNote|Ris|Bibtex收藏本文 本文引用格式 陈琼, 张镱锂, 刘峰贵, 周强, 汪生珍, 成艺, 郭蓉, 支泽民, 许寰戈. 黄河流域河源区土地利用变化及其影响研究综述. 资源科学[J], 2020, 42(3): 446-459 doi:10.18402/resci.2020.03.04 CHEN Qiong. A review of land use change and its influence in the source region of the Yellow River. RESOURCES SCIENCE[J], 2020, 42(3): 446-459 doi:10.18402/resci.2020.03.04
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