Allometric Models for Estimating Tree Volume and Aboveground Biomass in Lowland Forests of Tanzania

Table 7

Evaluation of the selected general and site specific models for tree total, branches, and stem biomass.

Type	Section	Selected model	Prediction error%			Model efficiency
			Dindili	Rondo	All	Dindili	Rondo	All
General	Total tree biomass	7	−1.26	53	50.28	0.81	−0.61	−0.10
		9	−6.59	60	53.12	0.83	0.87	−0.25
		10	−14.97	19.10	2.06	0.81	0.91	0.87
		Chave et al., 2014 [12]	−12.59	23.24	−5.33	0.85	0.86	0.86
		Masota, 2015 [34]	25.07	151.30	88.1	0.84	−1.78	−0.84
	Branches biomass	6	−13.58	80	56.66	0.60	−0.47	−0.02
		8	−13.96	87	56.68	0.60	−0.47	−0.02
		10	−14.87	47.17	16.16	0.59	0.84	0.74
	Stem biomass	6	−23.46	38	−4.40	0.30	0.48	0.44
		9	−21.95	29.96	4.32	0.48	0.59	0.56
		10	9.17	23.57	16.37	0.72	0.91	0.86
Site specific (regional)	Total tree biomass	6	5.16	—	—	0.94	—	—
		7	—	6.47	—	—	0.72	—
		8	—	−1.26	—	—	0.77	—
		9	1.68	—	—	0.94	—	—
		10	3.75	4.31	—	0.88	0.93	—
	Branches biomass	6	4.82	—	—	0.87	—	—
		7	—	11.80	—	—	0.65	—
		8	4.62	−4.00	—	0.88	0.76	—
		10	5.89	7.14	—	0.69	0.69	—
	Stem biomass	6	9.06	9.39	—	0.83	0.72	—
		8	7.07	7.17	—	0.93	0.80	—
		10	17.52	12.73	—	0.71	0.91	—

The best selected models are in bold and italic.  Significantly different from zero ().