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Table 4 Historical and recent stand-replacing fire patch area statistics. Historical burn patch areas derived from combined tree-ring reconstructed aspen and spruce-fir stand-replacing fire patches. Recent burn patch area derived from fire severity maps (1984 to 2008, n = 352 fires). The conservative estimate of recent stand-replacing fire patch size includes only high-severity patches (H), and a more inclusive estimate includes high- and moderate-severity patches (H+M). Recent data only include patches >30 ha, equal to the smallest reconstructed historical stand-replacing fire patch.

From: Historical Stand-Replacing Fire in Upper Montane Forests of the Madrean Sky Islands and Mogollon Plateau, Southwestern USA

Ā 

Historical burn patches

Recent burn patches

Ā 

2600 m to 3100 m

>3100 m

2600 m to 3100 m

>3100 m

All elevations

Ā 

Aspen

Spruce-fir

H

H+M

H

H+M

H

H+M

Count

10

1

64

85

1

2

204

675

Mean (ha)

110

521

129

206

33

110

136

233

Median (ha)

63

521

80

86

33

110

65

74

Standardn deviation (ha)

89

ā€”

134

300

ā€”

70

204

500

Minimum (ha)

30

521

32

31

33

60

32

31

Maximum (ha)

286

521

637

1 540

33

159

1 929

5 136

Sum (ha)

1 104

521

8 251

17 507

33

219

27 810

157 482