Table 1 Description of silvicultural treatments including number of replicates and total study plots per treatment
Study | Treatment | Description | Replicates | Total plots |
|---|---|---|---|---|
LHPIS | Control | No management since logging in 1920s | 5 | 90 |
LHPIS | Thin-BT | Thin from below leaving all trees DBH > 76 cm and with a target spacing of ~ 6–8 m between all dominant and co-dominant trees. All trees < 10 cm DBH were felled following harvest. This was a typical “fuel reduction” treatment for the Forest Service in California at the time | 5 | 91 |
LHPIS | Thin-P | Radial thin from below leaving all pines with DBH > 30 cm and firs > 76 cm, with a target spacing around dominant and co-dominant trees of ((their diameter (cm) + 12.7) × 0.12) meters. All trees < 10 cm DBH were felled following harvest. To augment pine regeneration, 15% of the treatment area was converted to 0.2–1.4 ha openings planted with ponderosa pine seedlings. The long-term goal in this treatment was to create stands in which pine constituted at least 80% of basal area | 5 | 89 |
LHPIS | Thin-P-fire | As in Thin-P above, but with broadcast burning in fall 2001 and fall 2010 | 5 | 91 |
FFS | Fire-only | Broadcast burning fall 2002 and fall 2011 | 3 | 30 |