{"id":"zianis-2003-iv-mbt","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 moesiaca total branch dry biomass, nonlinear DBH fit (Table IV MBT)","output":{"quantity":"branch_biomass"},"expression":"0.1097 * D^2.0545","published":{"expression":"0.1097 * D^2.0545","units":{"D":"cm"},"output_unit":"kg"},"taxon":{"level":"species","name":"Fagus moesiaca","group":"broadleaf"},"region":{"scope":"site","countries":["GR"],"place":"Vermio Mountain, Northern Greece","biomes":["temperate"]},"stand":"natural","fit":{"n_trees":16,"dbh_min_cm":5.19,"dbh_max_cm":40.6,"r2":0.91,"method":"nonlinear regression on the original scale"},"evidence":[{"field":"expression","quote":"MBT = aDᵇ; a = 0.1097, b = 2.0545","locator":"Table IV, model in caption and MBT row, p. 443"},{"field":"expression","quote":"MBT             D           0.1097          2.0545","locator":"Table IV, MBT, p. 443"},{"field":"output","quote":"MBT: branch mass (including epicormics)","locator":"Table III note, p. 442"},{"field":"output","quote":"oven dried to constant weight","locator":"Section 2.2, p. 441"},{"field":"published.units","quote":"Biomass is expressed in kg, diameter in cm, and height in m.","locator":"Table III note, p. 442"},{"field":"taxon","quote":"Fagus moesiaca Cz.","locator":"Abstract, p. 439"},{"field":"region","quote":"Vermio Mountains of Northern\nGreece","locator":"Abstract, p. 439"},{"field":"region","quote":"the forest can be classified as temperate Mediterranean","locator":"Section 2.1, p. 440"},{"field":"stand","quote":"Naturally regenerated, pure beech","locator":"Section 2.1, p. 440 (rendered page)"},{"field":"fit.n_trees","quote":"number of sampled trees was 16","locator":"Table III caption, p. 442"},{"field":"fit.dbh_min_cm","quote":"5.19 to 40.6 cm","locator":"Section 2.2, p. 441"},{"field":"fit.dbh_max_cm","quote":"5.19 to 40.6 cm","locator":"Section 2.2, p. 441"},{"field":"fit.r2","quote":"0.91","locator":"Table IV, MBT, R2, p. 443"},{"field":"fit.method","quote":"Nonlinear equations were developed for","locator":"Section 3.1, p. 443"}],"check":[{"inputs":{"D":20},"expected":51.662183,"origin":"computed","note":"Computed from the Table IV nonlinear power fit."}],"verification":"original_read","checked_at":"2026-11-05","notes":"D is DBH at 1.3 m. This original-scale nonlinear fit needs no log back-transformation correction. Branch mass includes epicormic branches. The authors report better SSE for nonlinear models, but lower MPD for the log models of total, stem and branch mass. The retained 5.19–40.6 cm range is explicitly reported in the methods (p. 441); the later comparison describes a largest Greek tree of 41.45 cm (p. 446). That sample-description discrepancy is not used to extend the reported range."}