Tree Allometrics

Socratea exorrhiza / Aboveground biomass

Socratea exorrhiza AGB from diameter and stem height

Aboveground biomassSocratea exorrhiza · ArecaceaePerunaturalRead from the original paper
No openly licensed photo yet
Equation

As printed (Table 3)

Socratea ln(AGB) ln(D2Hstem) -3.7965 1.0029 0.976 20 0.227

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

Aboveground biomass = 1.0261 * exp(-3.7965 + 1.0029 * ln(D^2 * Hstem))
D
Diameter at breast height (1.3 m), cm
Hstem
Palm stem height, ground to the lowest leaf, m

Hstem = stem height to the base of the lowest leaf (m). D at 1.3 m or above the stilt roots. Fitted Hstem range 2.0–21.9 m. Correction factor multiplied in.

Source
MdD Socratea exorrhiza 20 4-24 2.0-21.9 3.2-23.9
Smallest DBH · Table 1
A correction factor, exp(RSE2/2), was applied to biomass estimates from logarithmically transformed models (Baskerville, 1972).
Correction factor · Section 2.4, lines 220–221 (author post-print)
Trees measured
20
DBH range
4–24 cm
R²
0.976
Residual SE
0.227
Correction factor
1.0261 (applied)
Method
OLS on ln(AGB) vs ln(D²·Hstem); Baskerville correction exp(RSE²/2)
Where
Terra firme moist forest, forestry concession, Madre de Dios, Peru
Last checked
2026-11-01
Calculate
79.6
Aboveground biomass (kg)
37.4
Carbon (kg), ×0.47
137
CO₂e (kg), ×44/12
Fitted DBH range0100200300400500600510152025303540DBH (cm)Aboveground biomass (kg)Aboveground 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 = 15, Hstem = 1579.679.6Computed from the printed form
computed from the Table 3 coefficients times exp(RSE²/2)

Report a problem with this equation · JSON

Related