Figure 2
Biplot of the first two PCA axes of biological factors, soil factors, and the three stand age ranges. CD = canopy density; SD = stand density; TBMag and TBMbg = total above- and below-ground biomass; DBH = diameter at breast height; θ = soil moisture content; ρ = soil bulk density; f = soil porosity; TN = total nitrogen; TP = total phosphorus; TK = total potassium; AN = alkaline hydrolysis nitrogen; AP = available phosphorus; AK = available potassium; TCBMag, TCBMbg and Clitter = carbon storage in TBMag, TBMbg and litter; SCS = soil carbon storage; TCS = forest ecosystem total carbon storage.
