Biodiversity of Different Types of Plantation Communities in the Forest Region of Kuanba

Richness,species diversity,dominance and evenness indices were applied to studying the three different plantation communities—Phellodendron amurense plantation,Larix kaempferi plantation and Cryptomeria fortunei-Cunninghamia lanceolata mixed forest community in the Forest Region of Kuanba.The results were as follows: the Phellodendron amurense plantation community had a lower richness and diversity in tree layer,but had a higher richness and diversity in shrub and herb layers;Cryptomeria fortunei-Cunninghamia lanceolata mixed forest community had a higher richness and diversity in tree layer,but had a lower in shrub and herb layers;Larix kaempferi plantation community's richness was in the middle.There was a difference among the different layers in the communities, and the differences of richness and species diversity indices between the tree layer and shrub layer were significant.