Characteristics of Sarcosperma laurinumCommunity and Species Diversity from Qi-ao Island in Zhuhai City,Guangdong Province

Results from a study on Sarcosperma laurinum communities from Qi-ao Island in Zhuhai city,Guangdong province,showed that:(1)61species of vascular plants belonging to 38families and 51genera were found in the Sarcosperma laurinumcommunity,with the floristic components of the community exhibiting a south subtropical property;(2)Analysis for the age structure of the community showed that the dominant species belonged to some stable populations,and the frequency index of the community was ABCDE,which was consistent with Raunkiaers frequency law;(3)For species diversity of the community,D=13.70,H =4.12,E=0.39,E′=0.82.Results indicated that the diversity and evenness indices were closed to those of a climax community from a typical subtropical evergreen broadleaved forest.