Monitoring of Desertification Using Spectral Information in Lnner Mongolia, China
Spectral measurement was applied to monitor degradation of steppe grassland in Inner Mongolia, China. Supply of drinking water for domestic animal is an important for nomadic peoples in Xilingol steppe. There is only one main drinking place (site00) for animals at the center of Branch No.4 of Baiyinkulun Livestock Farm. So the distance from the village (site-00) can be used as an effective indicator for grazing intensity since the water tank in the village is the main drinking place for animals. In addition to the measurement of surface reflectance, vegetation surveys were carried out as a function of the distance from site-00 at every l-km interval to each four directions until the 5-km point It has cleared that the effects of grazing on vegetation mitigated according to the distance from site-00. Negative plant indicators of grazing intensity such as Stipa grandis increased in dominance with distance from site-00, whereas positive indicators of grazing intensity, such as Cleistogenens squarrosa decreased. Changes in growth parameters along the environmental gradients were reflected on NDVI (Normalized Difference Vegetation Index), in which NDVI was positively correlated with the aboveground biomass (r=0.77), plant height (r= 0.69) and coverage (r=0.89), respectively. These results suggested that a spectral vegetation index is effective for the detection of the degradation in free grazing grassland.
Degradation Distance from water tank Floristic composition NDVI Steppe vegetation
Tsuyoshi Akiyama Kensuke Kawamura Ayumi Fukuo Genya Saito Zuozhong Cheng
River Basin Research Center, Gifu University, Gifu 501-1193, Japan Graduate School for International Development and Cooperation, Hiroshima University, Hiroshima 739-8 Japan International Research Center of Agricultural Science, Ibaraki 305-8686, Japan Graduate School of Agricultural Science, Tohoku University,Miyagi 981-8555, Japan Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
国际会议
首尔
英文
212-213
2009-08-10（万方平台首次上网日期，不代表论文的发表时间）