Table 2 Composite and point fire return interval (years) statistics by slope aspect for small (any site scarred), intermediate (10% or more sites burned), and widespread fires (25% or more sites burned). There was no difference in FRI (Kruskal Wallis H-test, P > 0.05) by slope aspect for any size burn or for point fire return interval; n is the number of sites.

North (n = 6)

7.2

5.6

4.7 to 12.8

2.9

East (n = 9)

10.8

9.2

4.0 to 22.3

6.9

West (n = 10)

14.0

11.3

4.9 to 29.8

8.4

South (n = 9)

14.5

12.5

6.1 to 32

8.1

Composite fire return intervals, 10% scarred (yr)

Slope aspect

Mean

Median

Range

SD

North (n = 6)

7.2

5.8

4.7 to 12.8

2.9

East (n = 9)

10.8

9.3

4.0 to 22.3

6.9

West (n = 10)

14.0

12.4

4.9 to 29.8

8.4

South (n = 9)

14.5

12.6

6.1 to 32

8.1

Composite fire return intervals, 25% scarred (yr)

Slope aspect

Mean

Median

Range

SD

North (n = 6)

10.0

8.3

2.7 to 6.5

2.8

East (n = 9)

11.8

10.1

6.3 to 22.3

6.2

West (n = 10)

17.4

16.6

17.9 to 29.8

6.7

South (n = 9)

16.4

15

1 0.2 to 32

6.8

Point fire return intervals (yr)

Slope aspect

Mean

Median

Range

SD

North (n = 6)

14.5

10.5

11.2 to 20.4

3.8

East (n = 9)

18.4

17.8

8.7 to 23.8

11.7

West (n = 10)

22.4

18.3

10.4 to 30.2

6.2

South (n = 9)

21.6

20

11.8 to 32

6.4