Fig. 4

Gross primary production (GPP) and canopy absorbance simulated by PDG-Arena for 13 mixed stands. Three types of inventories were used: regularized monospecific inventories (RM, in very light blue), regularized inventories with species interactions (R, in light blue) and original inventories (O, in dark blue). Two-sided Wilcoxon signed rank test was used (ns: not significant, *: p-value < 0.05, ***: p-value < 0.001)