Table 1 Fire history statistics for the Hatton Ridge, Kentucky (HTN), and McAtee Run, Ohio (MAC), USA, study sites in four time periods. MFI = Mean fire interval, WMI = Weibull median interval. If there were <2 intervals for a period, then the mean fire interval or associated statistics are listed as “na” (not available)
From: Historical fire in the Appalachian Plateau of Ohio and Kentucky, USA, from remnant yellow pines
Full period | Pre-industrial period | Industrial period | Fire suppression period | |||||
|---|---|---|---|---|---|---|---|---|
1748–2004 | 1770–2014 | pre 1850 | 1850–1930 | 1930–presenta | ||||
HTN | MAC | HTN | MAC | HTN | MAC | HTN | MAC | |
Number of scars | 75 | 182 | 26 | 6 | 49 | 169 | 0 | 7 |
Number of fire years | 38 | 34 | 15 | 6 | 23 | 28 | 0 | 1 |
MFI (years) | 4.7 | 4.4 | 6.6 | 8.4 | 3.5 | 2.7 | na | na |
Standard deviation | 4.3 | 4.5 | 6.2 | 5.3 | 1.9 | 1.7 | na | na |
Interval range (years) | 1 to 21 | 1 to 16 | 1 to 21 | 2 to 16 | 1 to 8 | 1 to 8 | na | na |
WMI (years) | 3.9 | 3.4 | 5.2 | 7.7 | 3.3 | 2.5 | na | na |
Lower exceedance interval | 1.1 | 0.8 | 1.3 | 3.1 | 1.4 | 1.0 | na | na |
Upper exceedance interval | 9.1 | 8.8 | 13.0 | 14.1 | 5.7 | 4.6 | na | na |
Mean scarred (%) | 12.5 | 21.1 | 13.0 | 8.7 | 12.0 | 23.3 | na | 36.8 |
10% filtered MFI (years) | 9.7 | 5.2 | 12.3 | na | 5.3 | 3.9 | na | na |
25% filtered MFI (years) | 52.3 | 6.3 | na | na | na | 5.7 | na | na |
Individual tree MFI (years) | 15.4 | 8.4 | 18.9 | 11.0 | 10.4 | 7.5 | na | 25.0 |