{"id":"de-miguel-2014-syria-stem-26","source":{"id":"de-miguel-2014","citation":"de-Miguel, S., Pukkala, T., Assaf, N., & Shater, Z. (2014). Intra-specific differences in allometric equations for aboveground biomass of eastern Mediterranean Pinus brutia. Annals of Forest Science, 71(1), 101-112.","title":"Intra-specific differences in allometric equations for aboveground biomass of eastern Mediterranean Pinus brutia","authors":["de-Miguel, S.","Pukkala, T.","Assaf, N."],"year":2014,"venue":"Annals of Forest Science","doi":"10.1007/s13595-013-0334-4","url":"https://doi.org/10.1007/s13595-013-0334-4","read_url":"https://hal.science/hal-01098388/document","access":"open","license":"Open access copy via HAL (license not stated)","checked_at":"2026-11-02","status":"current"},"name":"Pinus brutia stem biomass, Syria (Eq. 26)","output":{"quantity":"stem_biomass"},"expression":"exp(-2.698 + 2.44 * ln(D))","published":{"expression":"exp(-2.698 + 2.44 * ln(D))","units":{"D":"cm"},"output_unit":"kg"},"taxon":{"level":"species","name":"Pinus brutia","family":"Pinaceae","group":"conifer"},"region":{"scope":"regional","countries":["SY"],"place":"Syria (dense, even-aged stands)","biomes":["subtropical","dryland"]},"stand":"natural","fit":{"n_trees":100,"method":"nonlinear generalized least squares on the intrinsically linear form, power variance function (no back-transform correction)"},"evidence":[{"field":"expression","quote":"y = e^(−2.698 + 2.44·ln d)","locator":"Table 3, Syria, Eq. 26, p. 105"},{"field":"fit.n_trees","quote":"Syria (100 trees)","locator":"Section 2.1, p. 103"}],"check":[{"inputs":{"D":10},"expected":18.547,"origin":"computed","note":"computed from the published form (coefficients as printed)"},{"inputs":{"D":25},"expected":173.4791,"origin":"computed","note":"computed from the published form (coefficients as printed)"},{"inputs":{"D":45},"expected":727.9676,"origin":"computed","note":"computed from the published form (coefficients as printed)"}],"verification":"original_read","checked_at":"2026-11-02","notes":"Printed residual standard error 0.239 and variance function coefficient δ = 0.96 (model fitted on the original scale, so RSE is not a log-scale value and is not entered as fit.rse). Total aboveground biomass = stem + branches + needles (dry). DBH-only forms are those the authors recommend for tree- and forest-level predictions. Country-specific DBH and height ranges are not printed, so none are entered. Equations using crown length (19, 21) and the crown-biomass equations (23, 24, 33, 34, 43, 44) are not included."}