Species diversity and stability of natural secondary communities in different layers with different cutting intensities 10 years later were investigated by calculating Marglef Richness index(R),Shannon-Wiener diversity index(H),Simpson diversity index(P),and Pielou Evenness index(J).Results show that the values of R,H and P among different layers are listed in a decreasing order:the shrub layer > the arbor layer > the herb layer,all the three indices values reach the maximum under medium selective cutting intensity after 10 years.The J value of the shrub layer shows a concave parabolic change with the increase in cutting intensity;it shows a linear increase for the arbor layer,whereas the J value of the herb layer shows an opposite change pattern.The values of R at different cutting intensities had high significant difference,but other indices had not significant difference.The stability of communities at different cutting intensities after 10 years is non-cutting> low selective cutting intensity > medium selective cutting intensity > high selective cutting intensity > extra-high intensity > clear cutting.The stability of communities at different cutting intensities after 10 years shows that the greater cutting intensities,the worse the stability is.
WU Zhi-long ZHOU Xin-nian ZHENG Li-feng HU Xi-sheng ZHOU Cheng-jun
