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Table 3 Forest floor and root data. Fine roots are <2 mm; medium roots are 2 mm to 10 mm. Parenthetical values are the standard error of n replicate plots. Within each column, values with the same letter are not significantly different at a α = 0.05 level.

From: The Influence of Fire on the Radiocarbon Signature and Character of Soil Organic Matter in the Siskiyou National Forest, Oregon, USA

  

Forest floor

  

Roots

 
 

n

Mass (kg m−2)

Woody debris* (%)

Depth (cm)

n

Fine root mass (g m−2)

Medium root mass (g m−2)

Unburned control

12

3.3 (±0.5)A

20(±4)A

0 to 15

4

346 (±12)A

199(±67)A

Low severity

12

2.1 (±0.5)B

19(±4)A

0 to 15

4

479 (±149)A

147 (±24)A

Mixed severity

12

2.0 (±0.2)AB

20 (±4)A

0 to 15

4

501 (±86)A

84 (±26)A

High severity

12

0.9 (±0.3)B

38 (±8)A

0 to 15

4

616 (±111)A

67 (±34)A

ANOVA P-value

 

0.0003

0.0536

  

0.6658

0.1135

  1. * Percent of total forest floor mass.