Raphia laurentii / Aboveground biomass
Raphia laurentii AGB from stem base diameter (m13, mean petiole diameter ≥5 cm)
As printed (Table 2, m13 row (AGB in kg dry mass); CF defined in Methods, p. 5)
In this library's units, ready to compute (kg)
Aboveground biomass = 1.11 * exp(-5.737 + 3.048 * ln(DRC))DRC- Root collar / stem base diameter, cm
Whole-palm aboveground dry biomass (stem, sheaths, petioles, rachis and leaflets, so foliage is included). Stem base diameter was measured about 13 cm above the ground, mapped to DRC (root collar / stem base diameter); the fitted range of this variable is 8.20–35.40 cm (Table 1, all 90 palms), which is not DBH so it is not stored as a DBH range. Fitted on palms with mean petiole diameter 5–15 cm (60 palms); ranges of the subset are not given. CF is the printed correction factor (rounded to 2 decimals) and is applied in the expression. Single-predictor model: the paper's better models use the sum of petiole diameters (not a canonical variable; not captured), so this is a fallback for when only diameter or height is measured. R² adj printed: 0.69; RSE 0.45 (Table 2).
doi:10.1371/journal.pone.0273591 · Open access · copy we read
The aboveground biomass estimated from each logarithmic linear model was multiplied by the following correction factor
Table 2 range (n): 5–15 cm (60)
- Trees measured
- 60
- Correction factor
- 1.11 (applied)
- Method
- ln-ln linear regression times correction factor CF = exp(RSE²/2)
- Where
- Peat swamp forest near Bolembe, Likouala Department, Republic of the Congo
- Last checked
- 2026-11-02
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 |
|---|---|---|---|
| DRC = 10 | 4 | 4 | Computed from the printed form computed from the published form (coefficients and CF as printed) |
| DRC = 20 | 33.1 | 33.1 | Computed from the printed form computed from the published form (coefficients and CF as printed) |
| DRC = 30 | 114 | 114 | Computed from the printed form computed from the published form (coefficients and CF as printed) |
Related
- Raphia laurentii AGB from total palm height (m15, mean petiole diameter ≥5 cm) · Bocko et al. 2023 · Height
- Raphia laurentii AGB from stem base diameter (m2, all sizes) · Bocko et al. 2023 · Root collar diameter
- Raphia laurentii AGB from total palm height (m4, all sizes) · Bocko et al. 2023 · Height
- Raphia laurentii AGB from total palm height (m15, mean petiole diameter ≥5 cm) · same paper · Aboveground biomass
- Raphia laurentii AGB from stem base diameter (m2, all sizes) · same paper · Aboveground biomass
- Raphia laurentii AGB from total palm height (m4, all sizes) · same paper · Aboveground biomass