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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

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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
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