中国草原生态系统退化的价值损失量遥感估算  

Lost value of Chinese grassland ecosystem due to degradation: An estimate based on remote sensing

作　　者：王瑞杰[1] 覃志豪[1] 姜立鹏[1] 叶柯[1] 

机构地区：[1]南京大学国际地球系统科学研究所,南京226007

出　　处：《生态学杂志》2007年第5期657-661,共5页Chinese Journal of Ecology

基　　金：国家自然科学基金项目(30571078);科技部社会公益资助项目(2003DIA7J047)

摘　　要：在传统的草原生态系统退化价值估算基础上,利用遥感技术对草原生态系统退化的价值损失进行估算,利用2003和2005年的MODIS数据获得草原生态系统退化的价值损失量空间分布图。结果表明:2003—2005年价值损失量共为66.603亿美元;单位面积价值损失量在0～1000美元.km-2的面积约占草原总面积的1/4,价值损失量1000～3000美元.km-2的面积约占草原总面积的1/3;内蒙古、新疆、西藏、青海、甘肃、云南和四川等西部7省的价值损失总量为52.219亿美元,占总价值损失量的78.41%,其中,内蒙古的价值损失量最大,占总价值损失量的25.89%。Chinese grassland ecosystem plays an important role in economic development and ecological services of this country. In recent decades, this ecosystem is facing challenges of degradation due to heavy population pressure and overgrazing. Based on the conventional evaluation on the lost value of rangeland due to degradation, an improved model was used to reevaluate the lost value with the MODIS data of 2003 and 2005, and the spatial distribution pattern of the lost value of Chinese grassland ecosystem was developed. The results showed that from 2003 to 2005, the total lost value of Chinese grassland ecosystem services due to degradation was 66. 603 × 10^8 US $. The area with a lost value of 0-1000 US $ · km^-2 was about 1/4 of the total area of measured grasslands, and that with a lost value of 1 000-3 000 US $·km^-2 was about 1/3 of the total. The seven provinces of West China including Inner Mongolia, Xinjiang, Tibet, Qinghai, Gansu, Yunnan and Sichuan had a lost value of 52. 219 × 10^8 US $ , accounting for 78.41% of the total, among which, Inner Mongolia had the largest loss, occupying 25.89% of the total.

关 键 词：草原生态系统 生态系统退化的价值损失 遥感 中国 

分 类 号：S812[农业科学—草业科学]