{"id":"mendonca-2013-strychnos-rubiginosa","source":{"id":"mendonca-2013","citation":"Mendonça, A.V.R., Souza, J.S., Giulietti, A.M., Van Den Berg, C. (2013). Estimação de biomassa aérea da caatinga no norte da Bahia. Pesquisa Florestal Brasileira, 33(76), 355-368.","title":"Estimação de biomassa aérea da caatinga no norte da Bahia","authors":["Mendonça, A.V.R.","Souza, J.S.","Giulietti, A.M."],"year":2013,"venue":"Pesquisa Florestal Brasileira","doi":"10.4336/2013.pfb.33.76.579","url":"https://doi.org/10.4336/2013.pfb.33.76.579","read_url":"http://ainfo.cnptia.embrapa.br/digital/bitstream/item/102670/1/EstimacaoBiomassa.pdf","access":"open","checked_at":"2026-11-02","status":"current"},"name":"Strychnos rubiginosa, total aerial dry biomass from ground-level diameter (Table 2)","output":{"quantity":"agb"},"expression":"0.286847 * DRC^1.59815","published":{"expression":"0.286847 * DAS^1.59815","units":{"DAS":"cm"},"variables":{"DAS":"DRC"},"output_unit":"kg"},"taxon":{"level":"species","name":"Strychnos rubiginosa","family":"Loganiaceae","group":"broadleaf"},"region":{"scope":"site","countries":["BR"],"place":"Casa Nova and Remanso, northern Bahia, lower-middle São Francisco (caatinga arbustivo-arbórea)","biomes":["tropical","dryland"]},"stand":"natural","fit":{"n_trees":15,"method":"regression; model chosen among literature models and Backward/Forward stepwise fits by residual plots, S%, t test and R2"},"evidence":[{"field":"expression","quote":"MS = 0,286847*(D1,59815)","locator":"Table 2, p. 360"},{"field":"fit.n_trees","quote":"amostrados 15 indivíduos, sendo três para cada classe de diâmetro, com exceção da espécie Chamaecrista belemii, em que foram amostrados 30 indivíduos","locator":"Ajuste das equações de regressão, p. 357"}],"check":[{"inputs":{"DRC":4},"expected":2.62925,"origin":"computed","note":"hand-computed from the published form (coefficients as printed)"},{"inputs":{"DRC":8},"expected":7.96019,"origin":"computed","note":"hand-computed from the published form (coefficients as printed)"},{"inputs":{"DRC":12},"expected":15.2175,"origin":"computed","note":"hand-computed from the published form (coefficients as printed)"}],"verification":"original_read","checked_at":"2026-11-02","notes":"Table 2 prints R2 as a percentage. D is diameter at ground level (DAS, 'diâmetro ao nível do solo', cm), mapped to DRC; H is total height in m; MS is dry mass in kg (Table 2 footnote). 'DH' and 'DH2' are read as D*H and D*H^2, and 'D2H' as D^2*H (variables listed on p. 358 as DAS*H, DAS*H2, DAS2*H). Total aerial dry biomass (leaves, branches, trunk). Diameter range of the sampled trees printed as 3,5 a 14 cm (ground-level diameter, so not entered as a DBH range): use inside that range. The printed 'D1,59815' has lost its superscript; read as D^1.59815 (the Nelson et al. power model MS = b0*DAS^b1 used in the paper). S, R2 and F are not printed for this species. Equations were also fitted by diameter class for all species pooled (Table 3); those are not included here."}