Studies on Landscape Classification and Changes Based on Forest Resource Inventory Data of Jingouling Forest Farm

A landscape classification method was developed based on forest resource inventory data of Jingouling Forest Farm of Wangqing Forestry Bureau,Jilin Province.The factors considered for landscape classification were land cover type as first level (forest farm) and dominate tree species group at second level (management compartment). Changes in landscape pattern were analyzed during the period of 1987 to 1997 at the two landscape levels. Major landscape types in the farm were mixed coniferous and broad-leaved forest forests,mixed coniferous forests,Larix forests and mixed broad-leaved forests. The numbers of patches in 1987 and 1997 were 592 and 946 respectively, which showed the trends of landscape fragmentation. Landscape diversity indices and relative richness decreased,but dominance indices increased. The influence of silviculture practices on the landscape pattern was primarily analyzed. Results indicated that greater changes in landscape types and the number of patches all occurred in the compartments with heavier forest management practice.