Table 1 Summary of pre-treatment conditions prior to three prescribed fires for raked and unraked sugar pine trees in Sequoia and Kings Canyon national parks, California, USA. N is sample size, Vigor is average crown vigor score, Infection is number of trees that displayed symptoms of blister rust, Beetles is number of trees that showed signs of beetle activity, Litter and Duff are the average depth of litter and duff measured at four locations at the base of each tree, respectively. No statistically significant differences were found between raked and unraked trees. Numbers in parentheses are standard deviations.
Burn | N | Treatment | dbh (cm) | Height (m) | Vigor | Infection | Beetles | Litter (cm) | Duff (cm) |
|---|---|---|---|---|---|---|---|---|---|
Cabin | 28 | Raked | 61.7 (43.6) | 20.8 (14.1) | 1.4 (0.6) | 5 | 0 | 4.6 (2.8) | 5.7 (5.1) |
Creek | 30 | Unraked | 59.4 (47.8) | 18.6 (13.6) | 1.6 (0.6) | 3 | 1 | 4.4 (3.0) | 4.8 (5.6) |
Redwood | 76 | Raked | 58.7 (44.5) | 25.9 (16.0) | 1.7 (0.9) | 22 | 12 | 4.1 (2.9) | 3.4 (2.3) |
Canyon | 77 | Unraked | 57.6 (40.9) | 26.2 (15.9) | 1.5 (0.9) | 22 | 8 | 3.3 (1.7) | 3.3 (2.2) |
Wall | 122 | Raked | 34.7 (33.8) | 17.5 (14.7) | 1.6 (0.8) | 33 | 9 | 4.7 (3.4) | 4.1 (2.8) |
Spring | 124 | Unraked | 31.2 (25.0) | 16.4 (12.5) | 1.6 (0.9) | 32 | 9 | 4.6 (3.0) | 4.3 (3.0) |
Average | 75 (47) | Raked | 51.7 (14.8) | 21.4 (4.2) | 1.6 (0.2) | 20.0 (14.1) | 7.0 (6.2) | 4.5 (0.3) | 4.4 (1.2) |
77 (47) | Unraked | 49.4 (15.8) | 20.4 (5.1) | 1.6 (0.1) | 19.0 (14.7) | 6.0 (4.4) | 4.1 (0.7) | 4.1 (0.8) |