Abstract: Based on aerial images of four periods,the GIStechnique supported by ARC/INFOsoftware was used to analyze the forest landscape heterogeneity and its dynamics of Guandishan Mountain forested area since the end of 1950s,by selecting Landscape Element Dominance Index(LEDI), Landscape Diversity Index(LDI),Landscape Patch Density(LPD),Landscape Edge Density(LED),Landscape Patchness Index(LPI) and Landscape Contagion Index(LCI) as six indexes.Methods for data treatment and calculation were introduced, and the applicability of these indexes was analyzed.On the support of GIStechnique,the above mentioned indexes could reveal and describe the structural characteristics of landscape heterogeneity from different aspects,which was useful to study the dynamic process of landscape heterogeneity.The results show that since the end of 1950's,the forest landscape in studied area was controlled by the combination of environmental heterogeneity,natural vegetation succession and human's activities,and the whole landscape heterogeneity changed significantly with different dynamic characteristics in three periods.The basic patterns and regulation factors of dynamic changes of forest landscape heterogeneity in secondary forest area with frequent human's activities were also discussed.

Key words: Forest landscape, Landscape heterogeneity, Heterogeneity measure index, Dynamic analysis, GIS technology