Table 2 Fire scar history data at the site and landscape scale for Arnold Air Force Base. Data are stratified by time periods associated with cultural changes. Data for fire intervals on individual trees are not shown in this table but can be viewed in Figures 3 and 5.
Huckleberry Ridge | Rowland Creek Headwaters | Saltwell Hollow | Lemm Swamp | All sites | |
|---|---|---|---|---|---|
Spatial extent (km2) | ∼1 | ∼1 | ∼1 | ∼1 | ∼100 |
All years | |||||
Time period | 1721 to 2003 | 1727 to 2003 | 1631 to 2004 | 1701 to 2004 | 1631 to 2004 |
Trees (n) | 34 | 44 | 35 | 30 | 143 |
Fire intervals (n) | 58 | 58 | 54 | 35 | 138 |
Mean fire interval (yr) | 2.9 | 4.52 | 5.7 | 6.5 | 2.23 |
Fire interval range (yr) | 1 to 13 | 1 to 35 | 1 to 28 | 1 to 32 | 1 to 26 |
Median interval (yr) | 2.4 | 3.2 | 3.9 | 5.2 | na |
Mean trees scarred (%) | 9.4 | 8.9 | 16.1 | 11.6 | 38.4a |
Range trees scarred (%) | 3 to 39 | 2 to 40 | 3 to 60 | 3 to 38 | 25 to 100a |
Fire scars (n) | 112 | 135 | 117 | 59 | 423 |
Dormant season fires (%) | 100 | 100 | 96 | 98 | 98 |
Growing season fires (%) | 0 | 0 | 4 | 2 | 2 |
Undetermined (%) | 0 | 0 | 0 | 0 | 0 |
Prior to Euro-American settlement period (before 1834) | |||||
Time period | 1721 to 1834 | 1727 to 1834 | 1631 to 1834 | 1701 to 1834 | 1631 to 1834 |
Trees (n) | 22 | 25 | 18 | 17 | 82 |
Fire intervals (n) | 20 | 24 | 31 | 22 | 60 |
Mean fire interval (yr) | 3.3 | 3.92 | 4.45 | 5.18 | 2.33 |
Fire interval range (yr) | 1 to 10 | 1 to 35 | 1 to 28 | 1 to 16 | 1 to 24 |
Median interval (yr) | 2.93 | 2.48 | 3.1 | 4.29 | 1.64 |
Mean trees scarred (%) | 13.6 | 10.3 | 21.3 | 14.9 | 43.3a |
Range trees scarred (%) | 5 to 29 | 4 to 30 | 6 to 60 | 6 to 38 | 25 to 100a |
Fire scars (n) | 33 | 38 | 62 | 36 | 169 |
Dormant season fires (%) | 100 | 100 | 97 | 97 | 97 |
Growing season fires (%) | 0 | 0 | 3 | 3 | 3 |
Undetermined (%) | 0 | 0 | 0 | 0 | 0 |
Euro-American settlement period (1834 to 1926) | |||||
Time period | 1834 to 1926 | 1834 to 1926 | 1834 to 1926 | 1834 to 1926 | 1834 to 1926 |
Trees (n) | 33 | 36 | 26 | 30 | 125 |
Fire intervals (n) | 36 | 25 | 10 | 8 | 60 |
Mean fire interval (yr) | 2.53 | 3.24 | 8.4 | 10.25 | 1.52 |
Fire interval range (yr) | 1 to 13 | 1 to 8 | 2 to 23 | 3 to 32 | 1 to 4 |
Median interval (yr) | 1.95 | na | na | na | 1.43 |
Mean trees scarred (%) | 7.28 | 6.07 | 9.45 | 7.44 | 34.17a |
Range trees scarred (%) | 3 to 39 | 3 to 23 | 4 to 19 | 3 to 12 | 25 to 75a |
Fire scars (n) | 74 | 53 | 23 | 17 | 167 |
Dormant season fires (%) | 99 | 100 | 100 | 100 | 100 |
Growing season fires (%) | 1 | 0 | 0 | 0 | 0 |
Undetermined (%) | 0 | 0 | 0 | 0 | 0 |
Military use (1926 to 2004) | |||||
Time period | 1926 to 2003 | 1926 to 2003 | 1926 to 2004 | 1926 to 2004 | 1926 to 2004 |
Trees (n) | 34 | 44 | 34 | 30 | 142 |
Fire intervals (n) | 1 | 7 | 11 | 3 | 17 |
Mean fire interval (yr) | na | 10.29 | 6.55 | 5.67 | 4.35 |
Fire interval range (yr) | na | 2 to 32 | 1 to 26 | 1 to 11 | 1 to 26 |
Median interval (yr) | na | na | 4.25 | na | 2.7 |
Mean trees scarred (%) | 7.5 | 14.71 | 8.5 | 5 | 36.11a |
Range trees scarred (%) | 6 to 9 | 2 to 40 | 3 to 18 | 3 to 7 | 25 to 75a |
Fire scars (n) | 5 | 44 | 32 | 6 | 87 |
Dormant season fires (%) | 100 | 100 | 91 | 100 | 92 |
Growing season fires (%) | 0 | 0 | 9 | 0 | 8 |
Undetermined (%) | 0 | 0 | 0 | 0 | 0 |