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Table 4 Mean percent forest floor (<1.4 m tall) cover by species group, treatment, and year, Green River Game Land, Polk County, North Carolina, USA.

From: Repeated Application of Fuel Reduction Treatments in the Southern Appalachian Mountains, USA: Implications for Achieving Management Goals

 

Forbs (%)

Grass (%)

Shrubs (%)

Trees (%)

Total (%)

Pretreatment

     

C

5.3

0.7

22.9

7.2

25.1

B

5.4

0.2

9.2

6.2

21.0

M

2.7

0.3

15.6

5.2

23.9

MB

5.0

0.3

17.2

6.7

29.3

Year 1 (1 growing season after first burn and mechanical treatments)

C

5.8

0.7

10.5

5.9

23.0

B

3.4

0.5

3.5

6.2

13.5

M

3.4

0.4

14.3

6.4

24.5

MB

3.5

0.8

6.2

7.8

18.2

Year 3

     

C

4.3

0.7

10.4

6.5 a

22.0

B

3.2

0.7

7.9

9.6 a

21.4

M

2.8

0.4

19.8

7.9 a

30.9

MB

5.3

2.2

14.6

17.3 b

39.4

Year 5 (1 growing season after second burn)

C

3.5 b1

0.9

12.8

6.9 a

24.2

B

3.3 b

1.0

12.2

10.6 b

27.1

M

2.2 a

0.3

20.2

7.1 a

29.8

MB

5.8 c

3.1

21.1

14.7 b

44.6

Year 9

     

C

3.6 ab

1.1

14.0

8.9 a

27.6 a

B

4.5 bc

1.1

15.1

16.2 b

37.0 a

M

2.3 a

0.4

22.0

9.9 a

34.6 a

MB

6.6 c

2.4

26.1

19.0 b

54.0 b

Year 10 (1 growing season after third burn and second mechanical treatments)

C

4.8

0.7

8.3

7.0 a

20.8 a

B

5.1

0.2

5.3

11.2 a

21.8 a

M

3.0

0.2

8.7

6.4 a

18.2 a

MB

8.0

0.3

10.6

19.6 b

38.5 b

Year 11

     

C

5.0 a

0.7

8.4

6.9 a

21.0 a

B

7.0 a

0.2

9.7

13.1 b

30.1 a

M

3.8 a

0.1

14.8

9.8 ab

28.5 a

MB

12.8 b

0.5

18.7

21.6 c

53.5 b

Year 12

     

C

4.8 a

0.7

10.4

6.2 a

22.1 a

B

7.7 a

0.3

11.2

12.1 b

31.4 ab

M

4.8 a

0.1

19.7

10.8 b

35.4 b

MB

13.0 b

0.4

21.2

16.2 c

50.8 c

  1. 1 Means followed by the same letter within a column and year are not significantly different at the Bonferroni adjusted level α = 0.00625 (overall α = 0.05). The absence of letters indicates that there were no significant differences within that column and year.