Table 5 Comparison of models for aboveground biomass estimation (site-specific and generalized equations)
Species | Model reference | Relative bias (%) | Average deviation (%) | Relative RMSE | t test | |
|---|---|---|---|---|---|---|
t statistic | p value | |||||
Allophyllus abyssinicus | This study | −7.41 | 21.09 | 0.280 | 0.0040 | 0.9969 |
Generalized | Brown et al. (1989) | 36.14 | 38.95 | 0.416 | 4.4287 | 0.0006 |
Generalized | Brown and Lugo (1992) | −2.58 | 23.36 | 0.342 | −0.8096 | 0.4327 |
Generalized | Brown (1997) | 18.45 | 25.31 | 0.287 | 24.4615 | 0.0286 |
Generalized | Chave et al. (2005) | −4.50 | 19.97 | 0.298 | −0.8262 | 0.4236 |
Generalized | Chave et al. (2014) | 7.21 | 23.38 | 0.303 | 0.1729 | 0.8654 |
Olea europaea | This study | −5.29 | 14.32 | 0.204 | 0.0955 | 0.9251 |
Generalized | Brown et al. (1989) | 40.81 | 43.21 | 0.445 | 6.2926 | <0.0001 |
Generalized | Brown and Lugo (1992) | 15.12 | 18.41 | 0.216 | 4.0902 | 0.0008 |
Generalized | Brown (1997) | 28.41 | 30.12 | 0.331 | 5.0996 | 0.0001 |
Generalized | Chave et al. (2005) | 1.54 | 14.16 | 0.188 | 0.7807 | 0.4464 |
Generalized | Chave et al. (2014) | 6.96 | 14.00 | 0.180 | 2.4653 | 0.0254 |
Olinia rochetiana | This study | −19.43 | 29.18 | 0.408 | 0.2015 | 0.8427 |
Generalized | Brown et al. (1989) | 44.16 | 46.50 | 0.497 | 4.2731 | 0.0005 |
Generalized | Brown and Lugo (1992) | 9.46 | 22.23 | 0.303 | −0.2241 | 0.8253 |
Generalized | Brown (1997) | 35.11 | 36.90 | 0.398 | 3.8545 | 0.0013 |
Generalized | Chave et al. (2005) | 5.27 | 17.30 | 0.243 | −0.1119 | 0.9122 |
Generalized | Chave et al. (2014) | 12.09 | 21.84 | 0.287 | 0.2137 | 0.8333 |
Rhus glutinosa | This study | 4.17 | 13.32 | 0.156 | 0.6595 | 0.5244 |
Generalized | Brown et al. (1989) | 13.07 | 32.05 | 0.374 | 0.4016 | 0.6965 |
Generalized | Brown and Lugo (1992) | −22.89 | 29.77 | 0.390 | −2.126 | 0.0593 |
Generalized | Brown (1997) | −4.19 | 31.22 | 0.340 | −0.7757 | 0.4559 |
Generalized | Chave et al. (2005) | −44.03 | 44.03 | 0.532 | −3.0834 | 0.0116 |
Generalized | Chave et al. (2014) | −34.32 | 37.04 | 0.472 | −2.5783 | 0.0275 |
Scolopia theifolia | This study | 2.43 | 13.59 | 0.168 | 0.4193 | 0.8290 |
Generalized | Brown et al. (1989) | 55.45 | 58.71 | 0.582 | 10.1593 | <0.0001 |
Generalized | Brown and Lugo (1992) | 40.91 | 43.31 | 0.444 | 9.2180 | <0.0001 |
Generalized | Brown (1997) | 42.49 | 44.99 | 0.458 | 8.5675 | <0.0001 |
Generalized | Chave et al. (2005) | 36.78 | 38.94 | 0.401 | 8.4323 | <0.0001 |
Generalized | Chave et al. (2014) | 43.88 | 46.46 | 0.470 | 9.7447 | <0.0001 |