{"id":"ramirez-2022-general-stem-d2","source":{"id":"ramirez-2022","citation":"Ramírez, J., Córdova, M., Imbaquingo, J., & Chagna, E. (2022). Modelos alométricos para estimar biomasa aérea en bosques secundarios montanos del noroccidente de Ecuador. Caldasia, 44(1), 82–94.","title":"Modelos alométricos para estimar biomasa aérea en bosques secundarios montanos del noroccidente de Ecuador","authors":["Ramírez, J.","Córdova, M.","Imbaquingo, J."],"year":2022,"venue":"Caldasia","doi":"10.15446/caldasia.v44n1.88198","url":"https://doi.org/10.15446/caldasia.v44n1.88198","read_url":"https://revistas.unal.edu.co/index.php/cal/article/view/88198","access":"open","checked_at":"2026-11-02","status":"current"},"name":"Stem biomass, all ages pooled (general) secondary montane forest, DAP² only","output":{"quantity":"stem_biomass"},"expression":"exp(8.966 + 1.326 * ln((D/100)^2))","published":{"expression":"exp(8.966 + 1.326 * ln(Dap^2))","units":{"Dap":"m"},"variables":{"Dap":"D"},"output_unit":"kg"},"taxon":{"level":"mixed","name":"Secondary montane forest trees, mixed species","group":"broadleaf"},"region":{"scope":"site","countries":["EC"],"place":"Cotacachi, Imbabura, NW Ecuador (1850 m a.s.l.)","biomes":["tropical","montane"]},"stand":"natural","fit":{"method":"regression on ln-transformed variables; coefficients as printed"},"evidence":[{"field":"expression","quote":"Bf = e^(8,966 + 1,326*ln(Dap²))","locator":"Tabla 4, p. 88 (fuste, General)"}],"check":[{"inputs":{"D":10},"expected":17.4536,"origin":"computed","note":"hand-computed from the published form (Dap in m)"},{"inputs":{"D":25},"expected":198.2537,"origin":"computed","note":"hand-computed from the published form (Dap in m)"}],"verification":"original_read","checked_at":"2026-11-02","notes":"Dap is in metres in the paper (Tabla 4 footnote), Ht in m, biomass in kg; printed as e^(a + b*ln(...)), natural log, no correction factor stated. Per-model adjusted R2 is in Tabla 4 but it is adjusted R2 and the per-model n is not stated, so both left out. Total = stem + branches + leaves."}