Equations / Aboveground biomass
Small-tree total AGB, multi-species, wood density model (Model I)
Aboveground biomass22 small-diameter (DBH ≤ 10 cm) tree species of secondary tropical forestMexiconaturalRead from the original paper
Many species, no single photo
Equation
As printed (Tab. 1, p. 168)
AGBtotal-tree multi-species=0.078479(ρ·DBH2·H)0.945339
In this library's units, ready to compute (kg)
Aboveground biomass = 0.078479 * (rho * D^2 * H)^0.945339rho- Wood density (oven-dry mass / green volume), g/cm³
D- Diameter at breast height (1.3 m), cm
H- Total tree height, m
Multi-species total-tree equation (stem + branches + foliage) from Model I. No correction factor is stated for this form. The paper lists adj-R2 0.96 and RMSE 0.1389. Tab. 1 prints the stem, branch and foliage component equations too; not added here.
Source
doi:10.3832/ifor3167-013 · Open access · copy we read
311 trees in total
22 species ranging from 1 to 10 cm DBH
- Trees measured
- 311
- DBH range
- 1–10 cm
- Method
- Nonlinear weighted OLS (SAS PROC MODEL), multi-species
- Where
- Southeast Yucatan peninsula (between Sian Ka'an, Quintana Roo, and Calakmul, Campeche)
- Last checked
- 2026-11-02
Calculate
Height from
8.31
Aboveground biomass (kg)
3.9
Carbon (kg), ×0.47
14.3
CO₂e (kg), ×44/12
Shaded: the DBH range the model was fitted on. Other inputs held at the values above.
Checks this equation passes
On every build, the library's form and the paper's own form (in its units) must both give these values within 1%.
| Inputs | Expected | We get | From |
|---|---|---|---|
| D = 6, H = 7, rho = 0.55 | 8.31 | 8.31 | Computed from the printed form computed from the Tab. 1 coefficients |
Related
- Small-tree total AGB, multi-species, DBH and height model (Model II) · Puc-Kauil et al. 2020 · DBH + Height
- Small-tree total AGB, multi-species, DBH and height model (Model II) · same paper · Aboveground biomass