Biomass and Volume Models Based on Stump Diameter for Assessing Degradation of Miombo Woodlands in Tanzania

Table 4

Volume model coefficients and performance.

Site	Model forms	Model coefficients			AIC	SE	SE%	E%	R^2
		a	b	c
Tabora		0.000031	2.78805		-41.0	0.72	45.7	-11.79	0.62
		-0.00234	0.00054		-1.257	1.01	63.93	-67.2	0.79
		0.00443	-0.0034	0.00059	-24.66	0.98	61.96	-14.5	0.80
Manyara		0.000035	2.77406		1.348	0.51	42.10	-0.85	0.89
		-0.0129	0.00050		23.85	1.06	88.12	-13.55	0.536
		0.0205	-0.0077	0.00079	9.75	0.79	65.04	-9.51	0.75
Lindi		0.000026	2.8908		-39.2	0.81	56.2	-9.6	0.789
		-0.0137	0.00059		2.132	0.88	61.39	-17.0	0.749
		0.0385	-0.01237	0.00098	-27.2	0.53	36.6	-9.80	0.91
Regional		0.000032	2.7992		-90.16	1.01	71.7	-10.5	0.709
		-0.00294	0.00056		30.7	0.99	70.4	-48.3	0.719
		0.00557	0.0041	0.00066	-41.8	0.91	64.6	-15.3	0.76

Note: Bold type indicates selected model.