{"id":"cortes-sanchez-2019-laurina-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 laurina: total aboveground biomass (sum of components)","output":{"quantity":"agb"},"expression":"(exp(-3.184629) * D^2.025824 * H^0.690906) + (exp(-6.893717) * (D^2 * H)^1.247303) + (exp(-4.816123) * D^2.174373)","published":{"expression":"(exp(-3.184629) * Dn^2.025824 * At^0.690906) + (exp(-6.893717) * (Dn^2 * At)^1.247303) + (exp(-4.816123) * Dn^2.174373)","units":{"At":"m","Dn":"cm"},"variables":{"Dn":"D","At":"H"},"output_unit":"kg"},"taxon":{"level":"species","name":"Quercus laurina 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":30,"dbh_min_cm":5.8,"dbh_max_cm":48.6,"h_min_m":4.35,"h_max_m":20.6,"method":"Additive system of component equations fitted simultaneously (iterated seemingly unrelated regression)"},"evidence":[{"field":"expression","quote":"Bt = ΣBi","locator":"Table 9, Quercus laurina"},{"field":"expression","quote":"Bf = exp (– 3.184629) × Dn^2.025824 × At^0.690906","locator":"Table 9, Quercus laurina"},{"field":"expression","quote":"Br = exp (– 6.893717) × (Dn² × At)^1.247303","locator":"Table 9, Quercus laurina"},{"field":"expression","quote":"Bh = exp (– 4.816123) × Dn^2.174373","locator":"Table 9, Quercus laurina"},{"field":"fit.n_trees","quote":"30","locator":"Table 1, Q. laurina"}],"check":[{"inputs":{"D":18.6,"H":9.2},"expected":99.9404,"origin":"computed","note":"computed from the published form (Table 9)"},{"inputs":{"D":35.8,"H":15.7},"expected":646.015,"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 0.98, branches 0.94, foliage 0.92, total 0.98 (Table 9). Total is the sum of the component equations, as the paper defines it."}