{"id":"forrester-2017-pinus-sylvestris","source":{"id":"forrester-2017","citation":"Forrester, D.I., Tachauer, I.H.H., Annighoefer, P., Barbeito, I., Pretzsch, H., Ruiz-Peinado, R., Stark, H., Vacchiano, G., Zlatanov, T., Chakraborty, T., Saha, S., Sileshi, G.W. (2017). Generalized biomass and leaf area allometric equations for European tree species incorporating stand structure, tree age and climate. Forest Ecology and Management, 396, 160–175.","title":"Generalized biomass and leaf area allometric equations for European tree species incorporating stand structure, tree age and climate","authors":["Forrester, D.I.","Tachauer, I.H.H.","Annighoefer, P."],"year":2017,"venue":"Forest Ecology and Management","doi":"10.1016/j.foreco.2017.04.011","url":"https://doi.org/10.1016/j.foreco.2017.04.011","read_url":"https://data.mendeley.com/datasets/4jytx9s44j/1","access":"paywalled","license":"Coefficient tables (Mendeley Data, doi:10.17632/4jytx9s44j.1): CC BY 4.0","checked_at":"2026-11-01","status":"current","notes":"The article is paywalled; the equation form (Eq. 3) and CF definition were read in the authors' revised manuscript (air.unimi.it/bitstream/2434/564213/2/FORECO_2017_103_Revision%201_V0.pdf). Coefficients come from the companion open dataset, Appendix A, worksheet 'Table A.5' (final general equations)."},"name":"European general equation, Pinus sylvestris, aboveground, diameter only (Eq. 3)","output":{"quantity":"agb"},"expression":"1.118707 * exp(-2.1575 + 2.3097 * ln(D))","published":{"expression":"1.118707 * exp(-2.1575 + 2.3097 * ln(d))","units":{"d":"cm"},"variables":{"d":"D"},"output_unit":"kg"},"taxon":{"level":"species","name":"Pinus sylvestris","family":"Pinaceae","group":"conifer"},"region":{"scope":"continental","countries":[],"place":"Europe (latitude min/mean/max 44 / 54.7 / 65 °N)","biomes":["temperate","boreal"]},"stand":"mixed","fit":{"dbh_min_cm":1,"dbh_max_cm":71,"r2":0.977,"cf":1.118707,"method":"Mixed-effects regression of ln(Y) on ln(d) (source as random effect) on 495 pseudo-observations generated from published equations plus raw data; Snowdon ratio CF"},"evidence":[{"field":"expression","quote":"ln(Y) = lnβ0 + β1ln(d) + ε (3)","locator":"Eq. 3, revised manuscript l. 322"},{"field":"fit.cf","quote":"a correction factor (CF) was calculated from the mean of the pseudo-observations divided by the mean of the values predicted by the regional equation (Snowden, 1991)","locator":"Methods, revised manuscript ll. 343–346"},{"field":"expression","quote":"Pinus sylvestris | Aboveground | 3 | -2.1575 | 2.3097 | CF 1.11870669937239 | N 495","locator":"Appendix A, worksheet Table A.5, row 424"},{"field":"fit.dbh_min_cm","quote":"d range (cm) 1 / … / 71 (min / mean / max)","locator":"Appendix A, Table A.5, row 424, column AU"}],"check":[{"inputs":{"D":30},"expected":333.759,"origin":"computed","note":"computed from the published form (with CF) at d = 30 cm"}],"verification":"original_read","checked_at":"2026-11-01","notes":"Y in kg per tree, d in cm at 1.3 m (manuscript l. 316). Printed intercept is ln(β0). CF (1.118707) multiplies the back-transformed prediction and is applied in both forms. N = 495 is the number of pseudo-observations plus raw observations, not trees. The same worksheet also gives versions with age, basal area, stand density and climate terms (Eqs. 4–21)."}