Table 3 Mean composite fire return interval (years) for small (any site scarred), intermediate (10% or more sites burned), and widespread fires (25% or more sites burned and point fire return interval) by forest type. Composite and point fire return intervals varied by forest type (Krukal Wallis H-test, P < 0.05) and were longest in fir-mixed conifer and shortest in pine oak forests (P < 0.05, Tukey post-hoc test); n is the number of sites.
| Â | Composite fire return intervals, any scarred (yr) | |||
|---|---|---|---|---|
Forest type | Mean | Median | Range | SD |
Pine-oak (n = 8) | 6.0 | 4.6 | 4.7 to 7.8 | 1.2 |
Pine-mixed conifer (n = 11) | 10.8 | 9.3 | 4.0 to 32 | 8.0 |
Fir-mixed conifer (n = 15) | 15.9 | 14.0 | 6.1 to 29.8 | 6.8 |
| Â | Composite fire return intervals, 10% scarred (yr) | |||
Forest type | Mean | Median | Range | SD |
Pine-oak (n = 8) | 5.9 | 4.7 | 4.7 to 7.8 | 1.2 |
Pine-mixed conifer (n = 11) | 10.9 | 9.4 | 4 to 32 | 8.0 |
Fir-mixed conifer (n = 15) | 15.9 | 14 | 6.1 to 29.8 | 6.8 |
| Â | Composite fire return intervals, 25% scarred (yr) | |||
Forest type | Mean | Median | Range | SD |
Pine-oak (n = 8) | 8.3 | 6.8 | 6.3 to 12.2 | 1.8 |
Pine-mixed conifer (n = 11) | 13.4 | 12.3 | 7.2 to 32 | 7.0 |
Fir-mixed conifer (n = 15) | 18.0 | 16.4 | 12.0 to 29.8 | 5.3 |
| Â | Â | Point fire return intervals (yr) | ||
Forest type | Mean | Median | Range | SD |
Pine-oak (n = 8) | 11.9 | 11.6 | 10.4 to 14.6 | 1.3 |
Pine-mixed conifer (n = 11) | 17.7 | 17.8 | 8.7 to 32 | 6.9 |
Fir-mixed conifer (n = 15) | 24.9 | 23.9 | 15.1 to 43.8 | 7.0 |