Characteristics of Plant Communities and Species Diversity in Wetlands in Yangguan National Nature Reserve in Dunhuang
As typical inland wetlands,Yangguan National Nature Reserve in Dunhuang is one of the important stops of migratory route for birds,which is vulnerable and particular.The studies on the characteristics plant communities in wetlands and species diversity have important significance for biodiversity protection.Based on the field investigation,the floristic composition,geographical elements and species diversity of plants in wetlands were studied in the reserve.The results showed that,26 families,56 genera and 74 species were recorded in the study area.The largest families were the Gramineae and Chenopodiaceae,accounting 29.73％ of the total number of species.Herbs were the most abundant life-form,accounting 77.03％ of the total number of species.The floral geographical elements of the plants were mainly composed of temperate zone distribution type.By using two way indicator species analysis (TWINSPAN),the vegetation in 36 sampling plots could be classified into 8 communities.The species diversity indices of communities were relatively low,but had large differences among each other.According to the importance value,the Margalef richness index ranged from 0-4.2.Simpson diversity index was between 0 to 0.512;Shannon diversity index ranged from 0 to 1.4,and Pielou evenness index was within the range of 0.538 to 1.The results indicated that the plant species were relatively rare and simple in general,the species diversity of communities were low,and the ecological environment is fragile in the reserve.
plant community characteristicsspecies diversityflorawetlandsYangguan National Nature Reserve in Dunhuang
NETL
NSTL
万方数据
维普
