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Fig. 3 | Forest Ecosystems

Fig. 3

From: Stand-level biomass models for predicting C stock for the main Spanish pine species

Fig. 3

Variation of biomass expansion factor (BEF), defined as dry weight biomass (W, in Mg·ha− 1) estimated from the Total Model, divided by stand volume (V, in m3·ha− 1), for different values of: Martonne aridity index (M, in mm·°C− 1); stand form factor (f); and mean tree volume (vm, in m3 per tree). The lines are drawn within the inter-percentile 5%–95% range of stand volume distribution. Solid lines represent the mean value of the variable for each species and dashed and dotted lines represent the 5% percentiles, the mean 95% of the variable distribution for each species

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