Table 3 Fire interval statistics for the four study sites. Results are for all fires occurring between 1700 and 1850 that scarred four or more trees. Statistics include spatial mean fire interval (SMFI) and standard deviation (SD) derived from the GIS, mean point fire interval (MPFI) and standard deviation (SD), and mean fire interval (CMFI) and standard deviation (SD) derived from the original point data. Minimum and maximum values are shown in parentheses for SMFI, MPFI, and CMFI. The number and average return interval for large fires (>20% scarred) are also shown.
From: Spatially Heterogeneous Estimates of Fire Frequency in Ponderosa Pine Forests of Washington, USA
| Â | Â | Point data | >20% Scarred | |||||
|---|---|---|---|---|---|---|---|---|
Site | SMFI | SD | MPFI | SD | CMFI | SD | Fires | Interval |
Entiat | 13.1 (6, 20) | 8.35 | 57.3 (10, 144) | 44.1 | 3.3 (1, 9) | 2.0 | 20 | 7 |
Nile | 17.0 (6, 150) | 10.2 | 46.2 (8, 150) | 39.9 | 3.3 (1, 8) | 2.1 | 13 | 10 |
South Deep | 45.3 (14, 131) | 33.4 | 58.1 (14, 145) | 38.6 | 9.3 (1, 28) | 7.5 | 5 | 26 |
Swauk | 15.8 (3, 148) | 9.4 | 39.3 (8, 144) | 32.1 | 1.8 (1, 6) | 1.0 | 9 | 14 |