Study on Taiwaniaflousiana Communities in Leigong Mountain, Gaoligong Mountain and Xingdoushan Nature Reserve

In 2017, one sample plot of 20m × 50m was established respectively at mixed communities of coniferous and broad leaf tree with more distribution of Taiwaniaflousiana in GuizhouLeigongshan National Nature Reserve, Yunnan Gaoligongshan National Nature Reserve and Hubei Xingdoushan Nature Reserve.Investigations were carried out by contiguous grid quadrat method on different layers of the plots and site conditions.The result showed that there were 243 vascular species, belonging to 148 genera and 77 families in 3 plots.T.flousiana population in Leigongshan was dominated with importance value of 0.363 5, followed by Gaoligongshan and Xingdoushan.The dominance index and species richness index at arbor layer in Leigongshan was higher than that in the other two reserves, species diversity index at arbor, shrub and herb layer was ordered by Leigongshan>Gaoligongshan>Xingdoushan.The species evenness index in different communities of 3 reserves was similar, ranging from 0.7 to 0.95.Analysis on areal-types of genera of plant in T.cryptomerioi des communities in Leigongshan, Gaoligongshan and Xingdoushan demonstrated that it could be divided into 24 types, dominated by tropical distribution, followed by temperate one, and wide spread was the last, 2 genera was endemic to China.