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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 SEt SE1 (%) SE2 (%) SEt (%) 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
  1. 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