Factor analysis to detect the causes of land degradation in Maduo County, northeastern Qinghai-Tibet Plateau |
| |
| Authors: | Fei Peng Xian Xue Tao Wang CuiHua Huang and Fang Zhang |
| |
| Institution: | Key Laboratory of Desert and Desertification, Cold and Arid Regions Environment and Engineering Research Institute, Chinese Academy of Sciences, No. 320 West Donggang Road, Lanzhou, Gansu 730000, China;Key Laboratory of Desert and Desertification, Cold and Arid Regions Environment and Engineering Research Institute, Chinese Academy of Sciences, No. 320 West Donggang Road, Lanzhou, Gansu 730000, China;Key Laboratory of Desert and Desertification, Cold and Arid Regions Environment and Engineering Research Institute, Chinese Academy of Sciences, No. 320 West Donggang Road, Lanzhou, Gansu 730000, China;Key Laboratory of Desert and Desertification, Cold and Arid Regions Environment and Engineering Research Institute, Chinese Academy of Sciences, No. 320 West Donggang Road, Lanzhou, Gansu 730000, China;Key Laboratory of Desert and Desertification, Cold and Arid Regions Environment and Engineering Research Institute, Chinese Academy of Sciences, No. 320 West Donggang Road, Lanzhou, Gansu 730000, China |
| |
| Abstract: | The area of desertified land has increased by 27.3% from 1987 to 2000 in Maduo County, northeastern Qinghai-Tibet Plateau. Driving forces of land degradation has been extensively studied in the region. Using Factor Analysis (FA), we evaluate contribution of human activity and natural environmental change to land degradation. Four common factors were extracted in this study. The result shows that climate related other than human-related factors, are the major inducing factors of land degradation in Maduo County. Climate change and consequent change of permafrost account for 70% to the land degradation. Increasing evaporation and declining precipitation in the beginning of the growing season hamper seedling establishment. Decreasing frozen days and rising active layer lower bound make surface soil loose and less soil moisture available for plant. |
| |
| Keywords: | land degradation factor analysis permafrost climate variations Maduo County Yellow River |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《寒旱区科学》浏览原始摘要信息 |
| 点击此处可从《寒旱区科学》下载免费的PDF全文 |
|
