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 3 Absolute standard errors (Mg ha⁻¹), percent standard errors, and 95 % confidence limits of the estimates of tree component biomass stocks for each sampling phase using regression equations and BEFs

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	SE₁	SE₂	SE_t	SE₁ (%)	SE₂ (%)	SE_t (%)	95 % CI (Mg ha⁻¹)	95 % CI (%)
Measures of precision for regression equations based biomass
1	Taproot + stump	0.7188	0.5592	0.9107	4.2733	1.8587	5.4139	±1.8214	±10.8279
2	Lateral roots	0.7837	0.5308	0.9465	4.9680	1.7861	6.0003	±1.8931	±12.0005
3	Root system (1 + 2)	1.4838	0.7357	1.6562	4.5520	1.6607	5.0809	±3.3124	±10.1618
4	Stem wood	3.8593	1.3301	4.0821	4.5517	2.0867	4.8145	±8.1642	±9.6289
5	Stem bark	0.4392	0.4069	0.5987	4.4976	1.6952	6.1308	±1.1975	±12.2616
6	Stem (4 + 5)	4.2984	1.4616	4.5401	4.5460	2.2593	4.8016	±9.0802	±9.6032
7	Branches	1.7476	1.7660	2.4845	4.6516	8.3019	6.6133	±4.9691	±13.2266
8	Foliage	0.1024	0.1399	0.1734	4.3902	0.8396	7.4346	±0.3468	±14.8692
9	Crown (7 + 8)	1.8166	1.8168	2.5692	4.5527	8.2723	6.4389	±5.1383	±12.8777
10	Shoot system (6 + 9)	6.1150	2.0033	6.4348	4.5480	2.9849	4.7858	±12.8695	±9.5716
11	Whole tree (3 + 10)	7.5988	2.5537	8.0164	4.5487	3.9039	4.7988	±16.0328	±9.5975
Measures of precision for BEF-based biomass
1	Taproot + stump	0.7565	0.5818	0.9543	4.5898	3.5300	5.7903	±1.9087	±11.5805
2	Lateral roots	0.6250	0.6029	0.8684	4.5898	4.4277	6.3773	±1.7369	±12.7546
3	Root system (1 + 2)	1.3815	0.7996	1.5962	4.5898	2.6566	5.3031	±3.1924	±10.6062
4	Stem wood	3.5331	0.8015	3.6229	4.5898	1.0411	4.7064	±7.2458	±9.4127
5	Stem bark	0.4113	0.3418	0.5348	4.5898	3.8147	5.9680	±1.0696	±11.9361
6	Stem (4 + 5)	3.9444	0.8141	4.0276	4.5898	0.9473	4.6865	±8.0551	±9.3730
7	Branches	1.5746	1.7159	2.3289	4.5898	5.0015	6.7883	±4.6578	±13.5766
8	Foliage	0.1302	0.3008	0.3278	4.5898	10.6013	11.5522	±0.6556	±23.1044
9	Crown (7 + 8)	1.7049	1.8741	2.5335	4.5898	5.0452	6.8206	±5.0670	±13.6412
10	Shoot system (6 + 9)	5.6493	2.0288	6.0025	4.5898	1.6483	4.8767	±12.0051	±9.7535
11	Whole tree (3 + 10)	7.0308	2.6231	7.5041	4.5898	1.7124	4.8988	±15.0083	±9.7975

Subscripts 1 and 2 indicate the first and second sampling phases, respectively; subscript t indicates the total standard error (SE) for a given component; the major components and their values are indicated in bold font

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