Fig. 1
From: Stand-level biomass models for predicting C stock for the main Spanish pine species
Schematic explanation about how to apply the developed model for future projections. SNFIF is the last Spanish National Forest Inventory available, ∆T is the time elapsed between SNFIF and the projection time T, M is the Martonne aridity index, Origin is the naturalness of the stand (plantation or natural stand), dg is the quadratic mean diameter (cm), Ho is the dominant height (m), RD is the relative stand density, p is the proportion of basal area of the species in the stand, VGE is the volume growth efficiency, IV is the volume increment (m3·ha− 1·year− 1), N is the number of trees per hectare, V is the volume of the stand (m3·ha− 1), vm is the mean tree volume, f is the stand form factor, W is the dry weight biomass, and C is the weight of carbon. The subscript “F” refers to the final SNFI, the last available, while “T” refers at projection time T. The variables with the subscript “sp” refer to the target species, variables without the subscript refer to the stand