{"id":"komiyama-2005-eq10-root","source":{"id":"komiyama-2005","citation":"Komiyama, A., Poungparn, S., Kato, S. (2005). Common allometric equations for estimating the tree weight of mangroves. Journal of Tropical Ecology, 21(4), 471–477.","title":"Common allometric equations for estimating the tree weight of mangroves","authors":["Komiyama, A.","Poungparn, S.","Kato, S."],"year":2005,"venue":"Journal of Tropical Ecology","doi":"10.1017/S0266467405002476","url":"https://doi.org/10.1017/S0266467405002476","read_url":"http://web.archive.org/web/20240413003651id_/https://core.ac.uk/download/pdf/59148776.pdf","access":"paywalled","checked_at":"2026-11-01","status":"current","notes":"Read the Gifu University repository postprint (hdl.handle.net/20.500.12099/29819) via its archived CORE copy."},"name":"Common mangrove root weight (Eq. 10)","output":{"quantity":"bgb"},"expression":"0.199 * rho^0.899 * D^2.22","published":{"expression":"0.199 * rho^0.899 * D^2.22","units":{"rho":"g/cm3","D":"cm"},"output_unit":"kg"},"taxon":{"level":"mixed","name":"Mangroves (10 species: Rhizophora, Bruguiera, Ceriops, Avicennia, Sonneratia, Xylocarpus)","group":"mangrove"},"region":{"scope":"regional","countries":["TH","ID"],"place":"Mangrove forests of Thailand and Indonesia","biomes":["tropical","mangrove"]},"stand":"natural","fit":{"n_trees":26,"r2":0.954,"rse":0.181,"cf":1.017,"method":"log-log regression, CF applied (Table 4)"},"evidence":[{"field":"expression","quote":"WR = 0.199ρ^0.899 D^2.22","locator":"Eq. 10, p. 475"},{"field":"fit","quote":"WR = 0.196ρ^0.899 (D²)^1.11 0.954 0.181 1.017","locator":"Table 4 (equation before CF)"},{"field":"fit.n_trees","quote":"Within the 104 tree samples, 26 individual trees were","locator":"Methods, p. 472"}],"check":[{"inputs":{"D":20,"rho":0.8},"expected":125.9,"origin":"computed","note":"hand-computed from the published form"}],"verification":"original_read","checked_at":"2026-11-03","notes":"Root weight includes the prop roots of Rhizophora and the aerial roots of other species. D is dbh for every species except Rhizophora: for a Rhizophora tree, enter DR0.3 (trunk diameter 30 cm above the highest prop root) as D, not its dbh. Bruguiera and Ceriops (also Rhizophoraceae) use dbh. Eq. 10 is Table 4's form times CF 1.017."}