with Cs the similarity coefficient, i the ith quadrat,n the number of quadrats, and Pc the mass fraction of
common species coexisting among the quadrats. Cs takes values of
[0,1], where values closer to 1 indicate greater similar.
Before statistical analyses, data were logarithmic transformed to
control the normality when necessary. Differences among groups were
evaluated by one-way ANOVA followed by least significant difference
(LSD) tests and Pearson correlation coefficients using SPSS 16.0 (SPSS
Inc., Chicago, IL, USA). All differences were considered significant atP <0.05.