{"id":"lwin-2026-mixed-rhod","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 + Sonneratia apetala aboveground biomass, a x^b of rho * DBH (Table 5)","output":{"quantity":"agb"},"expression":"0.483 * (rho * D)^2.419","published":{"expression":"0.483 * (rho * DBH)^2.419","units":{"DBH":"cm","rho":"g/cm3"},"variables":{"DBH":"D"},"output_unit":"kg"},"taxon":{"level":"mixed","name":"Avicennia officinalis and Sonneratia apetala","group":"mangrove","members":["Avicennia officinalis","Sonneratia apetala"],"members_complete":true},"region":{"scope":"site","countries":["MM"],"place":"Letkhokkon delta mangrove, Myanmar","biomes":["tropical","mangrove"]},"stand":"natural","fit":{"n_trees":30,"dbh_min_cm":5,"dbh_max_cm":20,"r2":0.934,"method":"Power function y = a x^b fitted in SPSS Curve Estimation (OLS on log-transformed variables, then back-transformed)"},"evidence":[{"field":"expression","quote":"ρDBH (g cm−3 cm) 30 0.483 (±0.0818) 2.419 (±0.121) 0.934*","locator":"Table 5"},{"field":"fit.n_trees","quote":"Thirty sample trees of Avicennia officinalis (Ao) and Sonneratia apetala (Sa) were harvested","locator":"Biomass measurement section"},{"field":"fit.dbh_min_cm","quote":"Letkhokkon, Myanmar Mixed 30 5 20 AGB=0.0698(ρDBH2H)0.969 0.95","locator":"Table 6, \"This study\" mixed-species row (n, DBH range (cm) columns)"}],"check":[{"inputs":{"D":8,"rho":0.5},"expected":13.8143,"origin":"computed","note":"computed from the Table 5 coefficients"},{"inputs":{"D":15,"rho":0.5},"expected":63.2005,"origin":"computed","note":"computed from the Table 5 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). Mixed-species model for the two dominant species pooled (n = 30); the pooled DBH range 5–20 cm is printed in Table 6 (Ao 5.0–13.0 cm, Sa 5.1–20.0 cm per Table 2); H range of the pooled sample is 4.6–13.6 m per Table 2 but not printed as one range, so left out. The paper reports ρDBH2H as the best-fit mixed model; all six Table 5 forms are included. AGB is leaf + branch + stem (aboveground, foliage included)."}