From: Pre-Columbian red pine (Pinus resinosa Ait.) fire regimes of north-central Pennsylvania, USA
Time period | 1370–1914 | 1370–1608 | 1609–1700 | 1701–1784 | 1785–1914 |
---|---|---|---|---|---|
Fire-regime statistics | |||||
 Fire years (n) | 147 | 30 | 23 | 24 | 70 |
 MFIa (years) | 2.9 | 4.1 | 4.2 | 3.5 | 1.9 |
 Rangea (years) | 1–19 | 1–19 | 1–15 | 1–10 | 1–8 |
 WFIa (years) | 2.6 | 3.3 | 3.7 | 3.2 | 1.7 |
 LEI/UEIa (years) | 0.7/5.6 | 0.9/8.0 | 1.2/7.6 | 1.2/6.1 | 0.6/3.3 |
 Tree MFIb (n) | 22.1 (199) | 32.4 (26) | 24.8 (104) | 15.9 (49) | 10.2 (20) |
 Scarreda (%) | 10.9 | 17.8 | 5.5 | 7.9 | 11.0 |
 Establishment (n) | 267 | 38 | 150 | 52 | 27 |
Fire scar seasonality | |||||
 Scars (n) | 1265 | 46 | 145 | 357 | 717 |
 U (%) | 40.8 | 50.0 | 48.3 | 40.6 | 38.8 |
 D (%) | 55.8 | 39.1 | 51.7 | 54.1 | 58.4 |
 E (%) | 1.3 | 6.5 | 0 | 1.40 | 1.3 |
 M (%) | 0.7 | 2.2 | 0 | 0.8 | 0.7 |
 L (%) | 0.9 | 2.2 | 0 | 2.80 | 0 |
 A (%) | 0.5 | 0 | 0 | 0 | 0.8 |
 GSFY (%) | 11.6 | 10.0 | 0 | 16.7 | 14.3 |