Abstract: By using 3S (GIS, RS and GPS) technology and field survey data, this paper studied the process of vegetation secondary succession after human interference in Juci Mountain, and analyzed the changes of community structure and leaf area index (LAI) at different stages of the vegetation succession from the macro- and micro aspects. The average LAI at tree stage was 4.1-5.5, at shrub stage was 3.0-3.7, and at herb stage was 1.0-1.5. The LAI and coverage of some shrubs in growth season were higher than those of trees. With the succession went on, the community structure also changed greatly. Both the quantity and the species number of trees increased gradually. The complexity and stability of vegetation system increased with succession, and the ecological function and ecosystem service value improved accordingly.

Key words: Urban green-land system, Landscape structure, Spatial pattern, Environmental monitoring, Air pollution