Distribution patterns of moss species in Shanghai city
上海市地面藓类植物的分布格局分析

The mosses on the floor of 22 sites at 20 main parks and 2 chemical plants in Shanghai city were investigated and sampled.Based on 75 recorded moss species and their coverage,Two-way Indicator Species Analysis (TWINSPAN) and Detrended Correspondence Analysis (DCA) were used to analyze their distribution patterns.The results showed that the study sites could be identified as three groups.Group 1 included two chemical plants and two parks at the center of the city,with 23 moss species and the smallest total coverage of 21.29%;group 2 included part of the parks at the center of the city and surrounding areas,with 44 moss species and total coverage of 37.94%;and group 3 mainly included the parks at surrounding areas and suburbs of the city,with 49 moss species and total coverage of 49.66%.The results reflected a certain correlation of the distribution of moss species with different habitats and polluted and disturbed environments in the city.