Study on Species Diversity of Subalpine Meadow Communities in Wolong Nature Reserve

The variation of species diversity along altitudinal gradients is one of the focuses in the studies of biodiversity.Based on the data from field survey species richness,α diversity and β diversity of the subalpine meadow in Wolong Nature Reserve,Sichuan Province,were analyzed.The results were as follows: There were 96 high plant species belonging to 76 genera and 28 families.Deyeuxia scabrescens,Polygonum viviparum,Kobresia sp.and Stellera chamaejasme were the most important dominant species.Species richness index was the highest at mid-altitude.α diversity indices(Shannon-Wiener index and Simpson index) increased firstly,then decreased with altitude increasing.Pielou evenness index increased with altitude increasing obviously.β diversity indices(Cody index and Wilson-Schmida index) increased with increasing altitude.