Skip to main content

Table 4 Comparison of biomass estimates measured in the Legacy Tree Database and predictions by three allometric biomass equations for the Legacy trees: local allometrics presented in this study, Jenkins et al. [11], and the Forest Inventory and Analysis Component Ratio Method (FIA-CRM)

From: Variability and uncertainty in forest biomass estimates from the tree to landscape scale: the role of allometric equations

  All Species (n = 285) Lodgepole pine (n = 114) Ponderosa pine (n = 108) Douglas-fir (n = 63)
RMSE Bias RMSE Bias RMSE Bias RMSE Bias
kg % kg % kg % kg % kg % kg % kg % kg %
Local 27.9 46.3 9.1 15.1 30.7 71.3 16.0 37.1 16.6 23.1 3.8 5.2 36.6 51.7 5.8 8.2
Jenkins 40.6 67.4 9.3 15.4 16.1 37.5 5.2 12.0 17.3 23.9 − 3.3 − 4.5 80.5 113.7 38.2 54.0
FIA-CRM 37.3 62.0 − 16.1 − 26.8 23.0 53.5 − 7.9 − 18.3 45.4 62.9 − 27.1 − 37.6 42.5 60.0 − 12.3 − 17.4
  1. Negative bias values indicate that the allometric equations are under-predicting biomass compared to the Legacy Database biomass