Impacts of Land Use and Land Cover Changes upon Ozygen Regulation Values for the Karst Ecosystem: a Case Study of Northwest Guangzi, China
The poverty and environmental degradation are very serious in karst regions of southwest China. In this paper, the spatial distributions and variations of oxygen regulation values (ORVs) were evaluated for the typical karst areas in Northwest Guangxi, China from 1985 to 2005, based on remote sensing and geographic information system techniques. The results showed that ORVs decreased firstly and then increased. ORVs were 9170 million Yuan in 1985, 5831 million Yuan in 1990, 7802 million Yuan in 2000 and 8793 million Yuan in 2005, respectively. Woodland and shrub were the two largest contributors to total ORVs (70.51％ in 1985, 69.13％ in 1990, 73.35％ in 2000 and 66.23％ in 2005). ORVs declined from west to east, and increased from 4338 million Yuan in 1985 to 4780 million Yuan in 2005 in the typical karst areas. This indicates that ecosystem conditions are improving because of the application of rocky desertification control policies.
ZHANG Ming-yang WANG Ke-lin CHEN Hong-song LIU Hui-yu
Key Laboratory for Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agricul College of Geography Science, Nanjing Normal University, Nanjing 210097, China
国际会议
2009 IEEE International Symposium on IT in Medicine & Education( IEEE 教育与医药信息化国际会议)
济南
英文
1276-1280
2009-08-14（万方平台首次上网日期，不代表论文的发表时间）