{"id":"goodman-2013-socratea-exorrhiza","source":{"id":"goodman-2013","citation":"Goodman, R. C., Phillips, O. L., del Castillo Torres, D., Freitas, L., Cortese, S. T., Monteagudo, A., & Baker, T. R. (2013). Amazon palm biomass and allometry. Forest Ecology and Management, 310, 994–1004.","title":"Amazon palm biomass and allometry","authors":["Goodman, R. C.","Phillips, O. L.","del Castillo Torres, D."],"year":2013,"venue":"Forest Ecology and Management","doi":"10.1016/j.foreco.2013.09.045","url":"https://doi.org/10.1016/j.foreco.2013.09.045","read_url":"http://eprints.whiterose.ac.uk/77906/7/Amazon%20Palm%20Biomass_Goodman_with_coversheet.pdf","access":"paywalled","checked_at":"2026-11-01","status":"current"},"name":"Socratea exorrhiza AGB from diameter and stem height","output":{"quantity":"agb"},"expression":"1.0261 * exp(-3.7965 + 1.0029 * ln(D^2 * Hstem))","published":{"expression":"1.0261 * exp(-3.7965 + 1.0029 * ln(D^2 * Hstem))","units":{"D":"cm","Hstem":"m"},"output_unit":"kg"},"taxon":{"level":"species","name":"Socratea exorrhiza","family":"Arecaceae","group":"palm"},"region":{"scope":"regional","countries":["PE"],"place":"Terra firme moist forest, forestry concession, Madre de Dios, Peru","biomes":["tropical"]},"stand":"natural","fit":{"n_trees":20,"dbh_min_cm":4,"dbh_max_cm":24,"r2":0.976,"rse":0.227,"cf":1.0261,"method":"OLS on ln(AGB) vs ln(D²·Hstem); Baskerville correction exp(RSE²/2)"},"evidence":[{"field":"expression","quote":"Socratea ln(AGB) ln(D2Hstem) -3.7965 1.0029 0.976 20 0.227","locator":"Table 3"},{"field":"fit.dbh_min_cm","quote":"MdD Socratea exorrhiza 20 4-24 2.0-21.9 3.2-23.9","locator":"Table 1"},{"field":"fit.cf","quote":"A correction factor, exp(RSE2/2), was applied to biomass estimates from logarithmically transformed models (Baskerville, 1972).","locator":"Section 2.4, lines 220–221 (author post-print)"}],"check":[{"inputs":{"D":15,"Hstem":15},"expected":79.597,"origin":"computed","note":"computed from the Table 3 coefficients times exp(RSE²/2)"}],"verification":"original_read","checked_at":"2026-11-01","notes":"Hstem = stem height to the base of the lowest leaf (m). D at 1.3 m or above the stilt roots. Fitted Hstem range 2.0–21.9 m. Correction factor multiplied in."}