{"id":"cortes-sanchez-2019-coccolobifolia-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 coccolobifolia: total aboveground biomass (sum of components)","output":{"quantity":"agb"},"expression":"(exp(-2.628007) * D^1.884293 * H^0.629242) + (exp(-6.885812) * (D^2 * H)^1.393789) + (exp(-1.998072) * D)","published":{"expression":"(exp(-2.628007) * Dn^1.884293 * At^0.629242) + (exp(-6.885812) * (Dn^2 * At)^1.393789) + (exp(-1.998072) * Dn)","units":{"At":"m","Dn":"cm"},"variables":{"Dn":"D","At":"H"},"output_unit":"kg"},"taxon":{"level":"species","name":"Quercus coccolobifolia Trel.","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":12,"dbh_min_cm":8.6,"dbh_max_cm":19.1,"h_min_m":5.36,"h_max_m":8.3,"method":"Additive system of component equations fitted simultaneously (iterated seemingly unrelated regression)"},"evidence":[{"field":"expression","quote":"Bt = ΣBi","locator":"Table 9, Quercus coccolobifolia"},{"field":"expression","quote":"Bf = exp (−2.628007) × Dn^1.884293 × At^0.629242","locator":"Table 9, Quercus coccolobifolia"},{"field":"expression","quote":"Br = exp (−6.885812) × (Dn² × At)^1.393789","locator":"Table 9, Quercus coccolobifolia"},{"field":"expression","quote":"Bh = exp (−1.998072) × Dn","locator":"Table 9, Quercus coccolobifolia"},{"field":"fit.n_trees","quote":"12","locator":"Table 1, Q. coccolobifolia"}],"check":[{"inputs":{"D":11.8,"H":6.2},"expected":38.0689,"origin":"computed","note":"computed from the published form (Table 9)"},{"inputs":{"D":15.9,"H":7.4},"expected":86.0235,"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 0.96, branches 0.75, foliage 0.33, total 0.94 (Table 9). The paper spells the species \"Q. cocccolobifolia\" in Table 9. Total is the sum of the component equations, as the paper defines it."}