{"id":"cortes-sanchez-2019-sideroxyla-agb","source":{"id":"cortes-sanchez-2019","citation":"Cortés-Sánchez, B. G., Ángeles-Pérez, G., De los Santos-Posadas, H. M., & Ramírez-Maldonado, H. (2019). Ecuaciones alométricas para estimar biomasa en especies de encino en Guanajuato, México. Madera y Bosques, 25(2), e2521799.","title":"Ecuaciones alométricas para estimar biomasa en especies de encino en Guanajuato, México","authors":["Cortés-Sánchez, B. G.","Ángeles-Pérez, G.","De los Santos-Posadas, H. M."],"year":2019,"venue":"Madera y Bosques","doi":"10.21829/myb.2019.2521799","url":"https://doi.org/10.21829/myb.2019.2521799","read_url":"https://myb.ojs.inecol.mx/index.php/myb/article/download/e2521799/1958","access":"open","license":"CC BY-NC-SA 4.0","checked_at":"2026-11-02","status":"current","notes":"Not added because the printed form does not reproduce sensible biomass: Table 5 foliage (Bh = 1.383732 × Dn^1.121362) and its total, Table 8 Group 2 foliage ((Dn² × At)^2.346752) and total, Table 9 Q. rugosa foliage (0.015364 × Dn² × At) and total."},"name":"Quercus sideroxyla: total aboveground biomass (sum of components)","output":{"quantity":"agb"},"expression":"(exp(-2.988285) * D^1.613082 * H^1.16314) + (exp(-4.317865) * D^3.305381 * H^(-0.64785)) + (exp(-4.613824) * D^2.16245)","published":{"expression":"(exp(-2.988285) * Dn^1.613082 * At^1.16314) + (exp(-4.317865) * Dn^3.305381 * At^(-0.64785)) + (exp(-4.613824) * Dn^2.16245)","units":{"At":"m","Dn":"cm"},"variables":{"Dn":"D","At":"H"},"output_unit":"kg"},"taxon":{"level":"species","name":"Quercus sideroxyla Bonpl.","family":"Fagaceae","group":"broadleaf"},"region":{"scope":"site","countries":["MX"],"place":"Sierra de Santa Rosa, Guanajuato (bosques de encino)","biomes":["temperate"]},"stand":"natural","fit":{"n_trees":33,"dbh_min_cm":4.8,"dbh_max_cm":40.5,"h_min_m":3.55,"h_max_m":15.7,"method":"Additive system of component equations fitted simultaneously (iterated seemingly unrelated regression)"},"evidence":[{"field":"expression","quote":"Bt = ΣBi","locator":"Table 9, Quercus sideroxyla"},{"field":"expression","quote":"Bf = exp (– 2.988285) × Dn^1.613082 × At^1.16314","locator":"Table 9, Quercus sideroxyla"},{"field":"expression","quote":"Br = exp (– 4.317865) × Dn^3.305381 × At^–0.64785","locator":"Table 9, Quercus sideroxyla"},{"field":"expression","quote":"Bh = exp (– 4.613824) × Dn^2.16245","locator":"Table 9, Quercus sideroxyla"},{"field":"fit.n_trees","quote":"33","locator":"Table 1, Q. sideroxyla"}],"check":[{"inputs":{"D":15.5,"H":7.2},"expected":77.2616,"origin":"computed","note":"computed from the published form (Table 9)"},{"inputs":{"D":29.8,"H":12.1},"expected":431.65,"origin":"computed","note":"computed from the published form (Table 9)"}],"verification":"original_read","checked_at":"2026-11-02","notes":"Table 1 sample size and ranges for this species. Adjusted R2 (not stored): stem 0.97, branches 0.96, foliage 0.91, total 0.99 (Table 9). Total is the sum of the component equations, as the paper defines it."}