Tree Allometrics

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Quercus coccolobifolia: stem biomass

Stem biomassQuercus coccolobifolia Trel. · FagaceaeMexiconaturalRead from the original paper
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Equation

As printed (Table 9, Quercus coccolobifolia)

Bf = exp (−2.628007) × Dn^1.884293 × At^0.629242

In this library's units, ready to compute (kg)

Stem biomass = exp(-2.628007) * D^1.884293 * H^0.629242
D
Diameter at breast height (1.3 m), cm
H
Total tree height, m

Table 1 sample size and ranges for this species. Adjusted R2 (not stored): stem 0.96, branches 0.75, foliage 0.33, total 0.94 (Table 9). The paper spells the species "Q. cocccolobifolia" in Table 9.

Source
12
Trees measured · Table 1, Q. coccolobifolia
Trees measured
12
DBH range
8.6–19.1 cm
Height range
5.36–8.3 m
Method
Additive system of component equations fitted simultaneously (iterated seemingly unrelated regression)
Where
Sierra de Santa Rosa, Guanajuato (bosques de encino)
Last checked
2026-11-02
Calculate
Height from
23.82
Stem biomass (kg)
11.2
Carbon (kg), ×0.47
41.06
CO₂e (kg), ×44/12
Fitted DBH range050100150200250510152025303540DBH (cm)Stem biomass (kg)Stem biomass

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%.

InputsExpectedWe getFrom
D = 11.8, H = 6.223.823.8Computed from the printed form
computed from the published form (Table 9)
D = 15.9, H = 7.446.746.7Computed from the printed form
computed from the published form (Table 9)

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