International Journal of Forestry Research / 2023 / Article / Tab 5 / Research Article
Aboveground Biomass Models for Indigenous Tree Species in the Dry Afromontane Forest, Central Ethiopia Table 5 Parameter estimates and statistics fit the AGB equations developed based on log-transformed linear models. Error: standard error; AIC akaike information criteria; RSE: residual standard error; and NA represents: not applicable or those variables represented by NA are not considered for that specific model development.
Species M cod Estimated parameters and respective std. error Statistical performance Βo β 1β 2β 3β 4Adj. R 2 RSE AIC - valueCF E. capensis 1 −1.64 2.27 (0.19) NA NA NA 0.94 0.16 −3.46 ≤0.001 1.01 2 0.08 NA NA 1.75 (0.45) NA 0.64 0.40 13.13 <0.05 1.08 3 −3.40 NA 2.69 (0.68) NA NA 0.64 0.40 13.0 <0.005 1.08 4 −2.77 NA 2.60 (0.70) NA 0.60 (0.68) 0.63 0.41 13.9 <0.05 1.09 5 −1.65 2.18 (0.38) NA 0.10 (0.34) NA 0.93 0.17 −1.58 ≤0.001 1.01 6 −1.24 2.21 (0.18) NA NA 0.40 (0.24) 0.97 0.14 −4.80 ≤0.001 1.01 7 0.65 NA NA 1.71 (0.44) 0.75 (0.65) 0.65 0.40 13.30 <0.05 1.08 8 −1.24 2.06 (0.34) NA 0.17 (0.31) 0.42 (0.26) 0.95 0.15 −3.31 ≤0.001 1.01 N. congesta 1 −3.11 2.61 (0.18) NA NA NA 0.96 0.13 −6.38 ≤0.001 1.01 2 −12.8 NA NA 6.82 (1.32) NA 0.76 0.34 10.34 <0.01 1.06 3 −4.23 NA 2.83 (0.66) NA NA 0.68 0.40 12.89 <0.05 1.08 4 −0.84 NA 2.16 (0.50) NA 1.69 (0.56) 0.85 0.27 6.73 <0.01 1.04 5 −5.26 2.23 (2.22) NA 1.28 (0.97) NA 0.97 0.13 −6.66 ≤0.001 1.01 6 −2.44 2.46 (0.26) NA NA 0.29 (0.37) 0.96 0.14 −5.26 ≤0.001 1.01 7 −8.03 NA NA 5.30 (1.43) 1.24 (0.69) 0.82 0.30 8.54 <0.01 1.05 8 −4.63 2.04 (0.39) NA 1.34 (0.98) 0.33 (0.35) 0.97 0.13 −6.08 ≤0.001 1.01 R. ruspolii 1 −2.31 2.46 (0.27) NA NA NA 0.84 0.30 10.91 ≤0.001 1.05 2 −1.92 NA NA 2.69 (0.49) NA 0.67 0.45 22.52 ≤0.001 1.11 3 −3.16 NA 2.64 (0.25) NA NA 0.88 0.26 6.87 ≤0.001 1.03 4 −3.25 NA 2.66 (0.28) NA −0.07 (0.38) 0.87 0.28 8.82 ≤0.001 1.04 5 −3.19 1.79 (0.31) NA 1.13 (0.37) NA 0.91 0.23 4.30 ≤0.001 1.03 6 −2.10 2.41 (0.3) NA NA 2.41 (0.42) 0.84 0.31 12.59 ≤0.001 1.05 7 −1.38 NA NA 2.63 (0.45) 0.97 (0.53) 0.72 0.41 20.85 ≤0.001 1.09 8 −2.86 1.65 (0.31) NA 1.23 (0.37) 0.42 (0.32) 0.91 0.23 4.08 ≤0.001 1.03