Equations / Aboveground biomass
Avicennia officinalis + Sonneratia apetala aboveground biomass, a x^b of DBH^2 * H (Table 5)
As printed (Table 5)
In this library's units, ready to compute (kg)
Aboveground biomass = 0.0425 * (D^2 * H)^0.943D- 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. Mixed-species model for the two dominant species pooled (n = 30); the pooled DBH range 5–20 cm is printed in Table 6 (Ao 5.0–13.0 cm, Sa 5.1–20.0 cm per Table 2); H range of the pooled sample is 4.6–13.6 m per Table 2 but not printed as one range, so left out. The paper reports ρDBH2H as the best-fit mixed model; all six Table 5 forms are included. AGB is leaf + branch + stem (aboveground, foliage included).
doi:10.3759/tropics.simm01 · Open access · copy we read
Thirty sample trees of Avicennia officinalis (Ao) and Sonneratia apetala (Sa) were harvested
Letkhokkon, Myanmar Mixed 30 5 20 AGB=0.0698(ρDBH2H)0.969 0.95
- Trees measured
- 30
- DBH range
- 5–20 cm
- R²
- 0.92
- 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
Shaded: the DBH range the model was fitted on. Other inputs held at the values above.
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 | 11.6 | 11.6 | Computed from the printed form computed from the Table 5 coefficients |
| D = 15, H = 9 | 55.8 | 55.8 | Computed from the printed form computed from the Table 5 coefficients |
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- Avicennia officinalis branch biomass, a x^b of DBH * H (Table 3) · same paper · Branch biomass
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- Avicennia officinalis stem biomass, a x^b of rho * DBH^2 * H (Table 3) · same paper · Stem biomass
- Avicennia officinalis + Sonneratia apetala aboveground biomass, a x^b of DBH (Table 5) · same paper · Aboveground biomass
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- Avicennia officinalis + Sonneratia apetala aboveground biomass, a x^b of rho * DBH (Table 5) · same paper · Aboveground biomass
- Avicennia officinalis + Sonneratia apetala aboveground biomass, a x^b of rho * DBH^2 * H (Table 5) · same paper · Aboveground biomass