Fig. 1
From: Re-estimating the changes and ranges of forest biomass carbon in China during the past 40 years
An example (Pinus massoniana in China) to convert stem volume (V, m3∙ha− 1) to AB biomass (Bw, t∙ha− 1) via WD (ρ) and allometric equation for the species. The stem biomass (Bs, t∙ha− 1) is an intermediate variable in the calculation. A restricted zone is designed ranging from the limit line of Bw (showing a proportion of 80% stem and 20% other parts of the tree) to the 45 degree line. Parameters a and b (plot 8) refer to Fig. 4. Note that the restricted zone may change for different species or forest types in realistic forests