Tree Allometrics

Equations / Aboveground biomass

Attalea phalerata AGB from stem height

Aboveground biomassAttalea phalerata · ArecaceaePerunaturalRead from the original paper
Photo of Attalea phalerata
© Vincent A. Vos · CC BY · iNaturalist
Equation

As printed (Table 3)

Attalea ln(AGB) ln(Hstem+1) 3.2579 1.1249 0.858 21 0.371

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

Aboveground biomass = 1.0712 * exp(3.2579 + 1.1249 * ln(Hstem + 1))
Hstem
Palm stem height, ground to the lowest leaf, m

Hstem = stem height to the base of the lowest leaf (m); the +1 lets stemless individuals (Hstem 0) be estimated. Fitted Hstem range 0–20.1 m. The authors used this genus model for other Attalea species in their plot analysis. Correction factor multiplied in.

Source
MdD Attalea phalerata 21 17-50 0-20.1 7.1-25.6
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
21
DBH range
17–50 cm
R²
0.858
Residual SE
0.371
Correction factor
1.0712 (applied)
Method
OLS on ln(AGB) vs ln(Hstem + 1); Baskerville correction exp(RSE²/2)
Where
Terra firme moist forest, forestry concession, Madre de Dios, Peru
Last checked
2026-11-01
Calculate
413.3
Aboveground biomass (kg)
194.2
Carbon (kg), ×0.47
712.2
CO₂e (kg), ×44/12
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
Hstem = 10413.3413.3Computed from the printed form
computed from the Table 3 coefficients times exp(RSE²/2)

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