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Table 1 Sample site descriptions and characteristics for areas treated with prescribed fire, as well as untreated controls, in Big Basin Redwoods State Park, California, USA. Data were collected in 2019 to determine the influence of burns conducted between 1999 and 2011 on vegetation, forest structure, and fuel load. Sites include: Ocean View Summit (OVSB), Skyline to the Sea burned (S2SB), Johansen Road East (JREB), Sunset Trail (SUNU), Skyline to the Sea unburned (S2SU), North Escape Road (NERU). Lowest RH = lowest humidity recorded on burn days; Highest RH = highest humidity recorded on burn days

From: Fuel load, stand structure, and understory species composition following prescribed fire in an old-growth coast redwood (Sequoia sempervirens) forest

  Prescribed-burned sample sites Unburned sample sites
OVSB S2SB JREB SUNU S2SU NERU
Year burned 1999 2007 2011 NA NA NA
Area burned (ha) ~109 146.2 206.7 NA NA NA
Elevation range (m) 410 to 472 304 to 439 413 to 492 259 to 340 357 to 425 307 to 360
Mean aspect (°) 142 237 241 240 265 144
Slope range (%) 0 to 51 12 to 65 16 to 62 14 to 49 11 to 55 5 to 40
Ignition dates 2 Nov 1999 to
8 Jan 2000
9 to 24 Nov
and Jan 2007
19 Oct 2011 to 4 Nov 2011 NA NA NA
Lowest RH (%) 35 37 12 NA NA NA
Highest RH (%) 100 100 100 NA NA NA
Fire activity Slow backing fire with intermittent runs. Backing fire with intermittent runs and torching. Backing fire with intermittent runs and torching. 0.4 ha slop-over NA NA NA