{"id":"cortes-sanchez-2019-sys1-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":"Six Guanajuato oaks pooled, system 1 (D and H): total aboveground biomass (sum of components)","output":{"quantity":"agb"},"expression":"(0.03367 * D^1.853235 * H^0.982072) + (0.027143 * D^3.228496 * H^(-0.82824)) + (0.0059 * D^2.246321)","published":{"expression":"(0.03367 * Dn^1.853235 * At^0.982072) + (0.027143 * Dn^3.228496 * At^(-0.82824)) + (0.0059 * Dn^2.246321)","units":{"At":"m","Dn":"cm"},"variables":{"Dn":"D","At":"H"},"output_unit":"kg"},"taxon":{"level":"genus","name":"Quercus (six species: rugosa, obtusata, sideroxyla, coccolobifolia, laurina, candicans)","family":"Fagaceae","group":"broadleaf","members":["Quercus rugosa","Quercus obtusata","Quercus sideroxyla","Quercus coccolobifolia","Quercus laurina","Quercus candicans"],"members_complete":true},"region":{"scope":"site","countries":["MX"],"place":"Sierra de Santa Rosa, Guanajuato (bosques de encino)","biomes":["temperate"]},"stand":"natural","fit":{"n_trees":165,"dbh_min_cm":4.8,"dbh_max_cm":48.6,"h_min_m":3.55,"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 4, model 3"},{"field":"expression","quote":"Bf = 0.03367 × Dn^1.853235 × At^0.982072","locator":"Table 4, model 3"},{"field":"expression","quote":"Br = 0.027143 × Dn^3.228496 × At^–0.82824","locator":"Table 4, model 3"},{"field":"expression","quote":"Bh = 0.0059 × Dn^2.246321","locator":"Table 4, model 1"},{"field":"fit.n_trees","quote":"Un total de 165 árboles","locator":"Methods / Table 1"}],"check":[{"inputs":{"D":17.9,"H":8.7},"expected":113.128,"origin":"computed","note":"computed from the published form (Table 4)"},{"inputs":{"D":35.5,"H":15.5},"expected":672.326,"origin":"computed","note":"computed from the published form (Table 4)"}],"verification":"original_read","checked_at":"2026-11-02","notes":"Dn and At are diameter at breast height and total height (At measured after felling, stump height included). Adjusted R2 (not stored): stem 0.9705, branches 0.8913, foliage 0.8086, total 0.9653 (Table 4). Total is the sum of the component equations, as the paper defines it."}