Landscape fragmentation around surface water in Horqin Sandy Land A case study in Naiman Banner
The study was conducted to explore the landscape iragmentatlon oi areas near water in Nmman Banner by using Landsat/TM data in 1987, 1999 and 2009 on RS and GIS technology. Four landscape indices of Pacth Density （PD）, Edge Density（ ED）, Shannon Diversity （SHDI） and Contagion Index（CONTAG） were calculated and anylyzed. Results showed that （ 1 ） the patch count around surface increased during the period, indicating that the degree of landscape fragmentation increased. （2） The PD and the ED increased during the period. The PD, ED and CONTAG indexes were negatively related to the distance from the edge of the waters, indicating the fragmentizing process near surface water. （3）Land use play an important role in the fragmentizing process near water area. The PD and ED of plantation, grassland and forest increased quickly from 1987 to 2009. It showed that the competition of land use around surface water was more and more heated. The PD and ED of bared sand land decreased during the period, indicating the recovery of sandy desertification. The landscape fragmentation showed the conflicts between the human being and the venerable ecosystem under the climate change and economic development.
landscape fragmentationlandscape indexregion around surface waterHorqin Sand Land
NETL
NSTL
万方数据
维普
