Fig. 6

Comparison of individual tree diameter increment predictions based on simulated virtual data, increment cores, and remeasurements. (a The relationships of 5-year diameter increment over diameter, b stand basal area, c basal area of larger trees (G_>d), d and site fertility (\( {\overline{h}}_{30} \), average height on the reference age). The dotted, dashed, and solid lines are, respectively, virtual-data-based predictions, increment core method predictions, and remeasurement-based predictions. Lines were generated by MAP (the maximum a posterior parameter vector). The grey area represents the 95% Bayesian credible interval based on parametric uncertainty of virtual data method. For Fig. 5a, the stand total basal area is 25 m² ha⁻¹, the basal area of larger trees is 5 m² ha⁻¹, and the \( {\overline{h}}_{30} \)is 12 m. For Fig. 5b, the diameter is 20 cm, the basal area of larger trees is 5 m² ha⁻¹, and the \( {\overline{h}}_{30} \)is 12 m. For Fig. 5c, the diameter is 20 cm, the stand basal area is 35 m² ha⁻¹, and the \( {\overline{h}}_{30} \)is 12 m. For Fig. 5d, the diameter is 15 cm, the stand basal area is 20 m² ha⁻¹, and the basal area of larger trees is 5 m² ha⁻¹)