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Table 3 Comparison of species-specific to pan-tropical equations in predicting biomass of A. grandibracteata and T. dregeana

From: The accuracy of species-specific allometric equations for estimating aboveground biomass in tropical moist montane forests: case study of Albizia grandibracteata and Trichilia dregeana

Input variableSourceTypeEquationsMean biomass difference (kg)PBIASRMSEPared t-test
T-valuep-value
DChave et al. [12]PTAGB = ρ × 0.223 × (D)2.148 × (D2)0.207 × (D3)0.0281117.20190.291859.624.0470.000
AgEq3SSTAGB = 0.175 × D2.2416.451.09213.940.1630.872
D, H, ρChave et al. [5]PTTAGB. = 0.0673 × (ρD2H)0.976457.8877.99776.723.9310.000
AgEq2SSTAGB = 0.445 × (D2H)0.749 × ρ1.03063.21− 10.77216.44− 1.6440.111
AgEq5SSTAGB = 0.159 × (D2H)0.78741.99− 7.15212.58− 1.0850.287
AgEq7SSTAGB = 0.497 × (ρDH)1.12995.61− 16.29269.68− 2.0420.050
Brown et al. [41]TFMTAGB = 0.0899 × (D2Hρ)0.9522499.9585.16822.144.1250.000
AgEq1SSTAGB = 0.452 × D2.117 × H0.062 ×ss ρ0.99133.85− 5.77179.34− 0.0350.309
DBrown [13]TFMTAGB = 0.118 × D2.531235210.362073.593.9930.000
AgEq3SSTAGB = 0.175 × D2.2416.451.09213.940.1630.872
D, H, ρChave et al. [12]TFMAGB = 0.0509 × ρD2H430.2873.29752.123.7560.001
AgEq1SSTAGB = 0.452 × D2.117 × H0.062 × ρ0.99133.85− 5.77179.34− 0.0350.309
AgEq4SSTAGB = 0.173 × D2.199 × H0.0493.62920.62211.030.0930.927
AgEq2SSTAGB = 0.445 × (D2H)0.749 × ρ1.03063.21− 10.77216.44− 1.6440.111
AgEq7SSTAGB = 0.497 × (ρDH)1.12995.61− 16.29269.68− 2.0420.050
DChave et al. [12]PTTAGB = ρ × 0.223 × (D)2.148 × (D2)0.207 × (D3)0.0281990.50211.854322.19− 2.7940.009
TdEq 5SSTAGB = 0.077 × D2.42789.899.57552.83− 0.8890.381
D,H, ρChave et al. [5]PTTAGB. = 0.0673 × (ρD2H)0.976555.8259.151099.35− 3.1560.004
TdEq2SSTAGB = 0.064 × (D2H)0.897 × ρ0.562130.80− 13.92575.441.2570.219
TdEq3SSTAGB = 0.042 × (D2H)0.888124.93− 13.29534.761.2940.206
Brown et al. [41]TFMTAGB = 0.0899 × (D2Hρ)0.9522592.6063.071128.80− 3.3220.002
TdEq1SSTAGB = 0.0799 × D2.029 × H0.593 × ρ0.64885.33− 9.08493.590.9450.352
TdEq2SSTAGB = 0.064 × (D2H)0.897 × ρ0.562130.80− 13.92575.441.2570.219
TdEq7SSTAGB = 0.109 × (ρDH)1.393236.08− 25.13907.311.4510.157
DBrown [13]TFMTAGB = 0.118 × D2.531532.30163.083409.18− 2.7090.011
TdEq5SSTAGB = 0.077 × D2.42789.899.57552.83− 0.8890.381
D, H, ρChave et al. [12]TFMTAGB = 0.0509ρD2H539.1157.381101.95− 3.0210.005
TdEq1SSTAGB = 0.0799 × D2.029 × H0.593 × ρ0.64885.325− 9.08493.590.9450.352
TdEq2SSTAGB = 0.064 × (D2H)0.897 × ρ0.562130.80− 13.92575.441.2570.219
TdEq3SSTAGB = 0.042 × (D2H)0.888124.93− 13.29534.761.2940.206
TdEq7SSTAGB = 0.109 × (ρDH)1.393236.08− 25.13907.311.4510.157
  1. PT: Pan-tropical, TFM: Tropical Forests Moist, SS: Species-specific, PBIAS: percent bias, RMSE: root mean square error, D: diameter at breast height, H: total height, ρ: wood density, AgEq: A. grandibracteata Equation; TdEq: T. dregeana Equation