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Table 4 Mean plot-level difference (d) in standing dead biomass (oven-dry kg) by tree component and estimation method (1 = CRM vs. CRM+DRF and 2 = CRM vs. CRM+DRF+SLA) for quaking aspen in the Lake States (2005-2009) and Douglas-fir in the Pacific Northwest (2001-2009).

From: Accounting for density reduction and structural loss in standing dead trees: Implications for forest biomass and carbon stock estimates in the United States

  

Quaking aspen

Douglas-fir

Component

Comparison

t

df

p

d

t

df

p

d

Top and branches

1

56.4

3966

< 0.001

19.6

21.4

2823

< 0.001

94.1

 

2

56.8

3966

< 0.001

45.1

21.2

2823

< 0.001

203.1

Bole

1

48.1

3966

< 0.001

65.8

21.2

2823

< 0.001

595.0

 

2

48.2

3966

< 0.001

78.1

21.2

2823

< 0.001

672.7

Stump

1

55.0

3966

< 0.001

3.4

23.4

2823

< 0.001

19.0

 

2

55.2

3966

< 0.001

4.0

23.5

2823

< 0.001

21.5

Belowground

1

50.6

3966

< 0.001

17.2

21.3

2823

< 0.001

158.4

 

2

49.9

3966

< 0.001

26.6

21.2

2823

< 0.001

216.5

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Carbon Balance and Management

ISSN: 1750-0680

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