Sonneratia apetala / Stem biomass
Sonneratia apetala stem biomass, a x^b of DBH^2 * H (Table 4)
Stem biomassSonneratia apetala · LythraceaeMyanmar (Burma)naturalRead from the original paper
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Equation
As printed (Table 4)
Stem (kg) DBH2H (cm2, m) 15 0.0125 (±0.0411×10−1) 1.046 (±0.0506) 0.970*
In this library's units, ready to compute (kg)
Stem biomass = 0.0125 * (D^2 * H)^1.046D- Diameter at breast height (1.3 m), cm
H- Total tree height, m
Power-law fit; the paper states coefficients are back-transformed from the log-log OLS fit and prints no correction factor, so none is applied. Site-level model for the Letkhokkon delta mangrove (Ayeyarwady delta region), Myanmar.
Source
doi:10.3759/tropics.simm01 · Open access · copy we read
Sa 15 5.1 20 4.6 13.6
The S. apetala had a DBH range of 5.1 cm to 20.0 cm and a H range of 4.6 m to 13.6 m
- Trees measured
- 15
- DBH range
- 5.1–20 cm
- Height range
- 4.6–13.6 m
- R²
- 0.97
- Method
- Power function y = a x^b fitted in SPSS Curve Estimation (OLS on log-transformed variables, then back-transformed)
- Where
- Letkhokkon delta mangrove, Myanmar
- Last checked
- 2026-11-02
Calculate
Height from
6.31
Stem biomass (kg)
2.97
Carbon (kg), ×0.47
10.9
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 = 8, H = 6 | 6.31 | 6.31 | Computed from the printed form computed from the Table 4 coefficients |
| D = 15, H = 9 | 35.9 | 35.9 | Computed from the printed form computed from the Table 4 coefficients |
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