{"id":"pathibang-2026-stem-power","source":{"id":"pathibang-2026","citation":"Pathibang, M.R., Ora, Y.A.N.R., Almuqu, A.A., et al. (2026). Allometric Biomass Equation Model of Sonneratia alba in Tanah Merah Mangrove Forest, Kupang, East Nusa Tenggara, Indonesia. Jurnal Penelitian Pendidikan IPA, 12(5), 906-915.","title":"Allometric Biomass Equation Model of Sonneratia alba in Tanah Merah Mangrove Forest, Kupang, East Nusa Tenggara, Indonesia","authors":["Pathibang, M.R.","Ora, Y.A.N.R.","Almuqu, A.A."],"year":2026,"venue":"Jurnal Penelitian Pendidikan IPA","doi":"10.29303/jppipa.v12i5.15100","url":"https://doi.org/10.29303/jppipa.v12i5.15100","read_url":"https://jppipa.unram.ac.id/index.php/jppipa/article/download/15100/10027","access":"open","checked_at":"2026-11-02","status":"current"},"name":"Sonneratia alba stem biomass, power model (D)","output":{"quantity":"stem_biomass"},"expression":"0.036 * D^2.503","published":{"expression":"0.036 * D^2.503","units":{"D":"cm"},"output_unit":"kg"},"taxon":{"level":"species","name":"Sonneratia alba","group":"mangrove"},"region":{"scope":"site","countries":["ID"],"place":"Tanah Merah Mangrove Forest, Kupang, East Nusa Tenggara","biomes":["tropical","mangrove"]},"stand":"natural","fit":{"n_trees":8,"r2":0.968,"method":"power model B = a D^b"},"evidence":[{"field":"expression","quote":"Power B = 0.036D^2.503 96.8% 0.131","locator":"Table 3, Power row"},{"field":"fit.n_trees","quote":"A total of 14 trees were felled to serve as measurement samples: 8 for model development and 6 for model validation.","locator":"Results and Discussion, p. 908"},{"field":"fit.r2","quote":"96.8%","locator":"Table 3, Power row"}],"check":[{"inputs":{"D":12},"expected":18.092,"origin":"computed","note":"computed from the published form (coefficients as printed)"},{"inputs":{"D":18},"expected":49.917,"origin":"computed","note":"computed from the published form (coefficients as printed)"},{"inputs":{"D":26},"expected":125.31,"origin":"computed","note":"computed from the published form (coefficients as printed)"}],"verification":"original_read","checked_at":"2026-11-02","notes":"Stand origin is not stated in the paper; classified natural from its reference to natural forest stands. Fitted on 8 of the 14 felled trees (the other 6 were held out for validation); the paper prints no DBH range for the fitting trees."}