Live above- and belowground biomass of a Mozambican evergreen forest: a comparison of estimates based on regression equations and biomass expansion factors

Magalhães, Tarquinio Mateus

doi:10.1186/s40663-015-0053-4

Forest Ecosystems

Table 1 Regression coefficients (± SE), BEF values (± SE) and the fit statistics for each tree component and for total biomass

From: Live above- and belowground biomass of a Mozambican evergreen forest: a comparison of estimates based on regression equations and biomass expansion factors

#	Tree component	b₀ (± SE)	b₁ (± SE) or BEF (Mg m⁻³) (± SE)	R² (%)	S_y.x (Kg)	CVr (%)	MR (%)
Regression model
1	Taproot + stump	1.3122 (±36.69 %)^b	0.0045 (±4.44 %)^c	87.93	7.94	33.57	1.1612
2	Lateral roots	– 1.0600 (±43.02 %)^a	0.0051 (±3.92 %)^c	91.09	8.05	33.47	1.7376
3	Root system (1 + 2)	0.2522 (±251.15 %) ^ns	0.0097 (±2.06 %) ^c	95.00	9.59	20.10	– 0.0709
4	Stem wood	0.6616 (±173.08 %)^ns	0.0251 (±1.59 %)^c	97.52	19.66	15.84	0.0871
5	Stem bark	0.1895 (±186.28 %)^ns	0.0028 (±3.57 %)^c	84.41	4.97	34.97	0.2638
6	Stem (4 + 5)	0.8511 (±147.84 %) ^ns	0.0279 (±1.79 %) ^c	97.58	21.89	15.83	0.1029
7	Branches	– 0.4569 (±332.74 %)^ns	0.0114 (±5.26 %)^c	82.14	27.54	49.55	0.7460
8	Foliage	0.7602 (±15.85 %)^c	0.0004 (±10.00 %)^c	49.41	1.86	66.21	1.5472
9	Crown (7 + 8)	0.3033 (±515.66 %) ^ns	0.0118 (±5.08 %) ^c	82.36	25.11	43.01	– 0.3190
10	Shoot system (6 + 9)	1.1544 (±149.39 %) ^ns	0.0398 (±1.51 %) ^c	97.75	31.07	15.80	– 0.0364
11	Whole tree (3 + 10)	1.4066 (±156.29 %) ^ns	0.0494 (±1.62 %) ^c	97.64	34.92	14.29	– 0.0440
BEF model
1	Taproot + stump	0.0000	0.1407 (±3.53 %)^c	80.96	8.34	35.26	4.3080
2	Lateral roots	0.0000	0.1162 (±4.43 %)^c	80.11	10.75	44.70	2.7686
3	Root system (1 + 2)	0.0000	0.2569 (±2.66 %) ^c	92.36	11.49	24.08	3.6116
4	Stem wood	0.0000	0.6569 (±1.04 %)^c	98.54	16.72	13.48	0.0755
5	Stem bark	0.0000	0.0765 (±3.81 %)^c	77.52	5.10	35.92	5.5460
6	Stem (4 + 5)	0.0000	0.7334 (±0.95 %) ^c	98.85	18.77	13.57	0.0600
7	Branches	0.0000	0.2928 (±5.20 %)^c	74.54	29.10	52.35	2.7087
8	Foliage	0.0000	0.0242 (±10.60 %)^c	36.17	2.93	104.21	2.7751
9	Crown (7 + 8)	0.0000	0.3170 (±5.05 %) ^c	76.34	28.89	49.48	2.7138
10	Shoot system (6 + 9)	0.0000	1.0504 (±1.65 %) ^c	95.05	36.61	18.61	4.6507
11	Whole tree (3 + 10)	0.0000	1.3072 (±1.71 %) ^c	95.06	45.67	18.69	4.4466

SE standard error (%), “^c” = significant at α = 0.001; “^b” = significant at α = 0.01; “^a” = significant at α = 0.05; ns = not statistically significant at α = 0.05; the major components and their values are indicated in bold font

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