关键词: 城市植被, 生态效益, 遥感, GIS, 城市生态系统分析(UEA)

Abstract: An investigation was made on the plant communities in the floodplain wetlands at north end of Kanas Lake, Xinjiang. The dynamics of plant community succession was studied by detrended correspondence analysis (DCA) ordination technique, and the dynamics of species diversity in the community succession was analyzed by using Shannon diversity index, Margalef’s richness index, Simpson’s diversity index, and Pielou’s evenness index. The relationships between species diversity and soil factors were also analyzed by detrended canonical correspondence analysis (DCCA). In the study region, the plant community succession was in the sequence of Carex melanostachya→Poa sibirica→Potentilla fruticosa→Betula humilis→ Picea obovata. Along with the succession process, the species dominance increased significantly, while the species diversity decreased after an initial increase, with a peak at the phase of community Potentilla fruticosa. There was a significant negative correlation between species dominance and soil water content.

Key words: Urban vegetation, Ecological benefits, Remote sensing, GIS, Urban Ecosystem Analysis (UEA)