Equations / Aboveground biomass
High wood density subgroup (LA) AGB from dbh (Table 4)
Aboveground biomassLysiloma microphyllum and Acacia cochliacantha (LA subgroup, wood density 0.83 g/cm3)MexiconaturalRead from the original paper
Many species, no single photo
Equation
As printed (Eq. 2, p. 4)
ln(Y) = ln(a) + b ln(X)
In this library's units, ready to compute (kg)
Aboveground biomass = exp(-1.399 + 2.225 * ln(D))D- Diameter at breast height (1.3 m), cm
ln(Y) = b0 + b1 ln(DBH), natural log, no correction factor stated in the paper. Aboveground biomass includes foliage and small branches (trunk and crown sections were summed). n 34 counts branch units, so n_trees is left out.
Source
doi:10.21829/myb.2021.2742441 · Open access · copy we read
LA: n 34; β0 -1.399; β1 2.225; R2 0.955
R2 0.955
Y is aboveground biomass (kg), X is dbh (cm)
- R²
- 0.955
- Method
- Linear regression of ln(biomass) on ln(dbh)
- Where
- Sierra de Huautla Biosphere Reserve (Ejido El Limón), Morelos
- Last checked
- 2026-11-02
Calculate
41.44
Aboveground biomass (kg)
19.48
Carbon (kg), ×0.47
71.42
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 = 10 | 41.4 | 41.4 | Computed from the printed form computed from the printed coefficients |
| D = 20 | 193.7 | 193.7 | Computed from the printed form computed from the printed coefficients |
Related
- Acacia cochliacantha AGB from dbh (Table 3) · same paper · Aboveground biomass
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- Euphorbia schlechtendalii AGB from dbh (Table 3) · same paper · Aboveground biomass
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- Lysiloma microphyllum AGB from dbh (Table 3) · same paper · Aboveground biomass