{"id":"lisboa-2025-tm1-d","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 total AGB from D (TM1)","output":{"quantity":"agb"},"expression":"exp(-1.740 + 2.289 * ln(D))","published":{"expression":"exp(-1.740 + 2.289 * ln(D))","units":{"D":"cm"},"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":{"n_trees":120,"dbh_min_cm":5,"dbh_max_cm":109,"h_min_m":3.8,"h_max_m":21.6,"r2":0.9481,"method":"log-linear OLS regression (ln Y = ln a + b ln D)"},"evidence":[{"field":"expression","quote":"ln(Y) = ln(a) + b(lnD) + Ɛ TM1 – 1.740 ± 0.168 (– 2.074 to − 1.405) 2.289 ± 0.059 (2.172 to 2.406)","locator":"Table 6, model TM1, p. 10"},{"field":"fit.n_trees","quote":"120 individuals of C. mopane","locator":"Methods, Forest inventory and destructive sampling, p. 3"},{"field":"fit.dbh_max_cm","quote":"D range (cm) 5–109","locator":"Table 3, row ID 1 (this study), p. 7"},{"field":"fit.h_max_m","quote":"Total tree height (m) 4.0 9.3 21.6 52 / 3.8 8.3 14.6 32","locator":"Table 4 (Mabalane and Tambara rows; min and max combined), p. 8"},{"field":"fit.r2","quote":"TM1 ... R-square 94.81","locator":"Table 7, model TM1, p. 10 (printed as a percentage)"}],"check":[{"inputs":{"D":20},"expected":166.87,"origin":"computed","note":"computed from the published form"}],"verification":"original_read","checked_at":"2026-11-01","notes":"Model 1 (D only); the authors suggest it gives lower uncertainty than the D+H model when height must itself be estimated. Total aboveground biomass is the sum of stem, branches (min. 3 cm) and foliage, so leaves are included. The printed intercept is ln(a); no back-transformation correction factor is stated in the paper and none is applied. TM1 to TM3 are the three AGB models the paper fits; all are included. R² is the printed R-square (94.81 %) as a fraction. Table 3 prints the same equation without exp(): Y = – 1.740 + 2.289 ln(D), where Y is ln of biomass. 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."}