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Table 2 ANOVA for the five carbon pools of the Chilimo dry afromontane forest along the altitude, slope, and forest patch

From: Temporal variation of ecosystem carbon pools along altitudinal gradient and slope: the case of Chilimo dry afromontane natural forest, Central Highlands of Ethiopia

Parameters

Factor

DF

Sum square

Mean square

F value

Pr > F

Aboveground biomass

 ACD (t C ha−1)

Forest patch

2

10,257

10,128

1.97

0.1480

Altitude class

2

33,432

16,716

3.25

0.0454*

Slope class

2

97,753

48,877

9.51

0.0025***

Time

1

930

930

0.18

0.67211

Residuals

62

318,701

5140

  

Belowground biomass

 BCD (t C ha−1)

Forest patch

2

1477

739

1.97

0.1480

Altitude class

2

2438

1219

3.25

0.0454*

Slope class

2

7126

3563

9.51

0.0025***

Time

1

68

58

0.18

0.6721

Residuals

62

23,233

375

  

Stump biomass

StCD (N ha−1)

Forest patch

2

8.31

4.16

2.83

0.0475

Altitude class

2

6.13

3.06

2.09

0.1337

Slope class

2

9.97

4.97

3.39

0.0405*

Period

1

0.45

0.45

0.30

0.5834

Residuals

57

83.77

1.47

  

Deadwood biomass

 DWCD (C t ha−1)

Forest patch

2

11.88

5.94

6.88

0.00401**

Altitude class

2

0.97

0.49

0.56

0.57642

Slope class

2

0.26

0.13

0.15

0.86325

Time

1

3.26

3.26

3.77

0.06314

Residuals

26

22.46

0.86

  

Herbaceous biomass

 HbCD (C t ha−1)

Forest patch

2

3.31

1.66

2.07

0.0146

Altitude class

2

3.59

1.80

2.25

0.1250

Slope class

2

2.50

1.25

1.57

0.2270

Residuals

27

21.58

0.80

  

Humus and litter biomass

 HUCD (t C ha−1)

Forest patch

2

765

382.4

4.007

0.02555*

Altitude class

2

321

160.3

1.680

0.19870

Slope class

2

607

303.3

3.178

0.055187

Period

1

804

804.0

8.423

0.00588**

Residuals

42

4009

95.4

  

Soil organic carbon

 SOCD (t C ha−1)

Forest patch

2

76,044

38,022

13.992

1.67e−06***

Altitude class

2

230,462

115,231

42.403

< 2e−16***

Land-use type

3

330,301

110,100

40.515

< 2e−16***

Slope class

2

11,857

5928

2.182

0.115

Depth

3

860,002

286,007

105.489

< 2e−16***

Time

1

538

538

0.198

0.657

Residuals

266

722,855

2717

  

Total ecosystem carbon

 TECD (t C ha−1) NF

Forest patch

2

3867

1934

0.08

0.9255

Altitude class

2

133,008

66,504

2.67

0.0775

Slope class

2

588,092

294,046

11.79

4.59e−05***

Time

1

1455

1455

0.06

0.8099

Residuals

62

1,546,631

24,946

  
  1. Where: ACD Above ground carbon density, DF Degree of freedom, HbCD Herbaceous carbon density, StCD Stump carbon density, DWCD Dead wood carbon density, NF Natural forest, HUCD Humus carbon density, SOCD Soil organic carbon density, tCha-1 tone carbon per hectare, and TECD Total ecosystem carbon density
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Journal of Ecology and Environment

ISSN: 2288-1220

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