Abstract: In May (spring) and October (autumn) 2005, the effects of grazing on the zoobenthos community in Chongming Dongtan wetland of Shanghai were investigated. A total of 3 transects including 90 sampling plots were set up. Transects Ⅰ and Ⅱ were in feeding area, and transect Ⅲ was in non-pasture area. All of these three transects were set in mid-tidal zone. 13 zoobenthos species were observed, with 7 species of arthropod, 4 species of mollusk, and 2 species of annelid. In spring, there were 6, 8 and 10 species in transects Ⅰ, Ⅱ and Ⅲ, while in autumn, the species number was 6, 8 and 12, respectively. The mean abundance of zoobenthos community in all transects was higher in autumn than in spring, and transect Ⅲ had the highest mean abundance and biomass both in autumn and spring. Transect Ⅲ also had the highest evenness, richness and diversity, indicating that grazing could change the species distribution of zoobenthos, and affect their abundance and biomass to different degree.Grazing had made certain negative effects on the biodiversity of zoobenthos community in Chongming Dongtan wetland.

Key words: City, Green space, Ecosystem services, Green equivalent, Environment