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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
  1. a2004 and 2014 for Hatton Ridge and McAtee Run, respectively