From the viewpoint of height class structure,the compositional complexity of tree species H(X),structural complexity of tree species H(Y|X),and complexity of whole community H(X,Y)all increased first,but decreased then with the succession.

• 按高度级结构计算的群落树种组成复杂性H(X)、层次结构复杂性H(Y|X)、群落总体复杂性H(X；Y)均呈先增加后减小的趋势:H(X)指数值在演替初期阶段为2.；96；演替中期增加到3