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

Fitted on these 2 species: Lysiloma microphyllum, Acacia cochliacantha

Photo: (c) Francisco Farriols Sarabia, some rights reserved (CC BY), uploaded by Francisco Farriols Sarabia — 2 of the 2 species it was fitted on · iNaturalist photos, hover for credit

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

Gómez, J.D., Etchevers, J.D., Campo, J., Monterroso, A.I., Paustian, K., Asensio, C. (2021). Allometric relationships to estimate aboveground biomass of species in a tropical dry forest of Central Mexico. Madera y Bosques, 27(4), e2742441.

doi:10.21829/myb.2021.2742441 · Open access · copy we read

LA: n 34; β0 -1.399; β1 2.225; R2 0.955

Equation · Table 4, p. 9

R2 0.955

R² · Table 4, p. 9

Y is aboveground biomass (kg), X is dbh (cm)

Output · p. 4

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

DBH (cm)

41.4

Aboveground biomass (kg)

19.5

Carbon (kg), ×0.47

71.4

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	194	194	Computed from the printed form computed from the printed coefficients

Report a problem with this equation · JSON

Acacia cochliacantha AGB from dbh (Table 3) · same paper · Aboveground biomass
Five-species pooled AGB from dbh (Table 4) · same paper · Aboveground biomass
Conzattia multiflora AGB from dbh (Table 3) · same paper · Aboveground biomass
Lower wood density subgroup (CEI) AGB from dbh (Table 4) · same paper · Aboveground biomass
Euphorbia schlechtendalii AGB from dbh (Table 3) · same paper · Aboveground biomass
Ipomoea arborescens AGB from dbh (Table 3) · same paper · Aboveground biomass
Lysiloma microphyllum AGB from dbh (Table 3) · same paper · Aboveground biomass

High wood density subgroup (LA) AGB from dbh (Table 4)

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