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Table 1 Study site descriptions of eight fires that burned with high severity in ponderosa pine forests in the US Southwest (1996 to 2006). Field data were collected in 2013. High-severity area was determined from RdNBR values ≥640. Percent indicates the percent of the total fire area that burned at high severity. Plots with regen = total number of plots for which post-fire ponderosa pine regeneration >15 cm tall was recorded, n = 43. Total number of plots = 175. The Pumpkin, Horseshoe, and Hochderffer fires were analyzed together as all occurred in the same area outside of Flagstaff, Arizona. Similarly, the BS and Bear fires were analyzed together as the occurred adjacent to each other in the Gila National Forest.

From: Limits to Ponderosa Pine Regeneration following Large High-Severity Forest Fires in the United States Southwest

Fire Year Area burned (ha) High-severity area (ha) Plots (n) Plots with regen (n)
Bridger-Knoll 1996 14 191 2859 (20%) 17 2
Pumpkin 2000 6 434 1414 (22%) 30 13
Horseshoe 1996 3 316 713 (22 %) 17 2
Hochderffer 1996 5 282 933 (18%) 8 1
Rodeo-Chediski 2002 184 701 67617 (37%) 38 18
BS 1998 1 790 791 (44 %) 5 3
Bear 2006 13 881 3353 (24 %) 31 2
Ponil 2002 35 634 10910 (31 %) 29 2
Total   265 229 88 590 (33%) 175 43