{"id":"lwin-2026-ao-stem","source":{"id":"lwin-2026","citation":"Lwin, K.M., Hien, C.T.T., Chan, N. (2026). Establishment of site- and species-specific allometric models of the dominant mangrove species and estimation of mangrove biomass in Letkhokkon Area, Myanmar. TROPICS, 35(1), 39–53.","title":"Establishment of site- and species-specific allometric models of the dominant mangrove species and estimation of mangrove biomass in Letkhokkon Area, Myanmar","authors":["Lwin, K.M.","Hien, C.T.T.","Chan, N."],"year":2026,"venue":"TROPICS","doi":"10.3759/tropics.simm01","url":"https://doi.org/10.3759/tropics.simm01","read_url":"https://www.jstage.jst.go.jp/article/tropics/35/1/35_SIMM01/_pdf/-char/en","access":"open","checked_at":"2026-11-02","status":"current"},"name":"Avicennia officinalis stem biomass, a x^b of rho * DBH^2 * H (Table 3)","output":{"quantity":"stem_biomass"},"expression":"0.0489 * (rho * D^2 * H)^0.948","published":{"expression":"0.0489 * (rho * DBH^2 * H)^0.948","units":{"DBH":"cm","H":"m","rho":"g/cm3"},"variables":{"DBH":"D","H":"H"},"output_unit":"kg"},"taxon":{"level":"species","name":"Avicennia officinalis","family":"Acanthaceae","group":"mangrove"},"region":{"scope":"site","countries":["MM"],"place":"Letkhokkon delta mangrove, Myanmar","biomes":["tropical","mangrove"]},"stand":"natural","fit":{"n_trees":15,"dbh_min_cm":5,"dbh_max_cm":13,"h_min_m":5.6,"h_max_m":8.2,"r2":0.965,"method":"Power function y = a x^b fitted in SPSS Curve Estimation (OLS on log-transformed variables, then back-transformed)"},"evidence":[{"field":"expression","quote":"Stem (kg) ρDBH2H (g cm−3 cm2 m) 15 0.0489 (±0.0126) 0.948 (±0.0504) 0.965*","locator":"Table 3"},{"field":"fit.n_trees","quote":"Ao 15 5 13 5.6 8.2","locator":"Table 2"},{"field":"fit.dbh_min_cm","quote":"The A. officinalis had a DBH range of 5.0 cm to 13.0 cm and a H range of 5.6 m to 8.2 m","locator":"Biomass measurement section"}],"check":[{"inputs":{"D":8,"H":6,"rho":0.5},"expected":7.143,"origin":"computed","note":"computed from the Table 3 coefficients"},{"inputs":{"D":15,"H":9,"rho":0.5},"expected":34.548,"origin":"computed","note":"computed from the Table 3 coefficients"}],"verification":"original_read","checked_at":"2026-11-02","notes":"Power-law fit; the paper states coefficients are back-transformed from the log-log OLS fit and prints no correction factor, so none is applied. Site-level model for the Letkhokkon delta mangrove (Ayeyarwady delta region), Myanmar. Wood density rho is per-tree basic density measured on trunk discs (species means: 0.557 g/cm3 Ao, 0.471 g/cm3 Sa)."}