{"id":"zianis-2003-eq4","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 foliage dry biomass, DBH and height (Eq. 4)","output":{"quantity":"foliage_biomass"},"expression":"0.0001997 * D^2 * H + 0.331","published":{"expression":"0.0001997 * D^2 * H + 0.331","units":{"D":"cm","H":"m"},"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":0.9493},"evidence":[{"field":"expression","quote":"MFT = 0.0001997(0.000012)D2H + 0.331(0.227), R2 = 0.9493","locator":"Eq. 4, p. 442"},{"field":"output","quote":"MFT = MFC + MFE","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":"0.9493","locator":"Eq. 4, p. 442"}],"check":[{"inputs":{"D":20,"H":15},"expected":1.5292,"origin":"computed","note":"Computed from the printed equation; the sampled trees' height range is not reported."}],"verification":"original_read","checked_at":"2026-11-05","notes":"D is DBH at 1.3 m; H is measured total height. Parentheses in the paper give standard errors, not multiplication terms. This original-scale equation needs no log back-transform correction. The authors say adding height improved foliage predictions. Total foliage includes crown and epicormic foliage. The DBH range retained here is the methods' explicit 5.19–40.6 cm range (p. 441); the comparison section describes a largest Greek tree of 41.45 cm (p. 446). That sample-description discrepancy is not used to extend the reported range. No fitted height bounds are supplied."}