Fig. 4
From: Re-estimating the changes and ranges of forest biomass carbon in China during the past 40 years
The biomass equations and wood densities used in China’s FCS estimation. a The regressions of 15 allometric equations (a: Bw = aBsb; b: Bw = ρV) that match 15 species re-classified in Additional file 1: Table SI_1. Bw represents AB biomass (t∙ha− 1), Bs expresses stem biomass (t∙ha− 1), and a and b are parameters. b Wood densities (the ratio of stem biomass to volume) for the 15 species. All data are field measurements by destructive sampling (Luo et al. 2013) for 181 species