{"id":"zianis-2003-v-branches","source":{"id":"zianis-2003","citation":"Zianis, D., & Mencuccini, M. (2003). Aboveground biomass relationships for beech (Fagus moesiaca Cz.) trees in Vermio Mountain, Northern Greece, and generalised equations for Fagus sp. Annals of Forest Science, 60(5), 439–448.","title":"Aboveground biomass relationships for beech (Fagus moesiaca Cz.) trees in Vermio Mountain, Northern Greece, and generalised equations for Fagus sp.","authors":["Zianis, D.","Mencuccini, M."],"year":2003,"type":"journal-article","venue":"Annals of Forest Science","doi":"10.1051/forest:2003036","url":"https://doi.org/10.1051/forest:2003036","read_url":"https://hal.science/hal-00883716/document","access":"open","checked_at":"2026-11-05","status":"current","notes":"The publisher's PDF returned HTTP 403 to the automated check, so publisher access could not be confirmed; the supplied HAL paper copy was read."},"name":"Fagus generalised branch biomass, DBH (Table V)","output":{"quantity":"branch_biomass"},"expression":"0.0219 * D^2.4208","published":{"expression":"0.0219 * D^2.4208","units":{"D":"cm"},"output_unit":"kg"},"taxon":{"level":"genus","name":"Fagus","group":"broadleaf"},"region":{"scope":"global","countries":[],"place":"Europe and eastern North America (source equations)","biomes":[]},"fit":{"dbh_min_cm":1,"dbh_max_cm":66,"r2":0.77,"method":"regression on predictions from published equations"},"evidence":[{"field":"expression","quote":"Y = aXᵇ; a = 0.0219, b = 2.4208","locator":"Equation (1), model, p. 441; Table V, Branches row, p. 446"},{"field":"expression","quote":"Branches                   0.0219                  2.4208                  1–66               0.77               58.11%","locator":"Table V, branches, p. 446"},{"field":"output","quote":"Branches","locator":"Table V, p. 446"},{"field":"taxon","quote":"for Fagus genus.","locator":"Introduction, p. 440"},{"field":"published.units","quote":"Biomass is expressed in kg, diameter in cm, and height in m.","locator":"Table III note, p. 442"},{"field":"fit.method","quote":"were log-transformed and a generalised equation","locator":"Section 2.4, p. 441"},{"field":"fit.r2","quote":"0.77","locator":"Table V, branches, p. 446"},{"field":"region","quote":"USA, Maine","locator":"Table II, p. 442"},{"field":"region","quote":"EU, Netherlands Centre","locator":"Table II, p. 442"},{"field":"fit.dbh_min_cm","quote":"1–66","locator":"Table V, Branches row, D range (cm), p. 446"},{"field":"fit.dbh_max_cm","quote":"1–66","locator":"Table V, Branches row, D range (cm), p. 446"}],"check":[{"inputs":{"D":20},"expected":30.901355,"origin":"computed","note":"Computed from the Table V coefficients, without an unreported correction."}],"verification":"original_read","doubt":"The methods describe log-transformed generalized fits, but Table V gives neither SEE nor a correction factor for this component and does not establish whether its coefficient includes back-transform correction. This record uses the printed power function; verify correction handling before treating its output as mean branch dry mass.","checked_at":"2026-11-05","notes":"D is DBH in cm; output is kg dry biomass. This is an original generalized fit to predictions from published equations, not a fit to independent harvested-tree observations. No additional correction can be calculated without SEE or CF. The 1–66 cm bounds are the domain explicitly reported in Table V, not extrema inferred from synthetic class means. The species used specifically for this component fit are not enumerated. Figure 4 describes validation refits excluding the Spanish and Greek equations; it does not print coefficients for those refits, so its plotted predictions are not substituted for Table V."}