Plant Community Diversity in the Buha River Region of the Qinghai Lake Downstream Area

Based on the data resources investigated from the field sample,8 community patterns in the Buha River region of the Qinghai Lake area were studied.The results showed that the community diversity have descent trend by species abundance,and species abundance almost had no effect to evenness.The significant positive correlation(P0.01)were existed between species diversity of community and the species richness and the species evenness.The correlation coefficient was 0.912 and 0.684 respectively.The correlation between community evenness and community richness was not quite significant,the interaction was little between the two indexes,which showed that species diversity was impuled by species richness.