{"id":"lisboa-2025-rm3-d2h","source":{"id":"lisboa-2025","citation":"Lisboa, S.N., Macôo, S., Sitoe, A.A. (2025). Allometric equations for estimating above and belowground biomass of Colophospermum mopane in Mozambique. Scientific Reports, 15, 3464.","title":"Allometric equations for estimating above and belowground biomass of Colophospermum mopane in Mozambique","authors":["Lisboa, S.N.","Macôo, S.","Sitoe, A.A."],"year":2025,"venue":"Scientific Reports","doi":"10.1038/s41598-025-87297-w","url":"https://doi.org/10.1038/s41598-025-87297-w","read_url":"https://www.nature.com/articles/s41598-025-87297-w.pdf","access":"open","license":"CC BY-NC-ND 4.0","checked_at":"2026-11-01","status":"current"},"name":"Mopane root biomass from D²H (RM3)","output":{"quantity":"bgb"},"expression":"exp(-2.797 + 0.803 * ln(D^2 * H))","published":{"expression":"exp(-2.797 + 0.803 * ln(D^2 * H))","units":{"D":"cm","H":"m"},"output_unit":"kg"},"taxon":{"level":"species","name":"Colophospermum mopane","family":"Fabaceae","group":"broadleaf"},"region":{"scope":"regional","countries":["MZ"],"place":"Mabalane (Gaza) and Tambara (Manica) districts, mopane woodland","biomes":["tropical","dryland"]},"stand":"natural","fit":{"r2":0.978,"method":"MM-estimator robust regression (ln Y = ln a + b ln(D²H))"},"evidence":[{"field":"expression","quote":"ln(Y) = ln(a) + bln(D2H) + Ɛ RM3 – 2.797 ± 0.306 (– 3.450 to − 2.144) 0.803 ± 0.030 (0.739 to 0.867)","locator":"Table 6, model RM3, p. 10"},{"field":"fit.r2","quote":"RM3 ... R-square 97.80","locator":"Table 7, model RM3, p. 10 (printed as a percentage)"}],"check":[{"inputs":{"D":20,"H":9},"expected":43.75,"origin":"computed","note":"computed from the published form"}],"verification":"original_read","checked_at":"2026-11-01","notes":"Root model with D²H; the D+H model RM2 is left out because its height term is not significantly different from zero (95% CI –0.591 to 1.350). Root biomass (BGB) is stump plus coarse roots from excavation; fine roots under 2 mm were not sampled. n and ranges are not stated separately for the root sample, so they are omitted. No back-transformation correction factor is stated or applied. n = 120 sampled trees (Methods p. 3, Table 3), but Table 5 heads the total-AGB column 'n = 84', so the fitted n may be 84."}