Table 2. Correlation of stand factors and diversity indices with forest biomass, productivity and their stability (S_B and S_P) at different plot size. Only significant relationships (p < 0.05) were listed for clarity. The unit of grain size is m2. Ric is species richness; Eve is species evenness; PSR, PSE, and PSV are phylogenetic richness, phylogenetic evenness and phylogenetic variability, respectively; FRic, FEve, and FDiv are functional richness, evenness and divergence, respectively. Level of significance: P < 0.001 ***, P < 0.01 ** , P < 0.05*.