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Fire Ecology

Table 1 Relationship between burn severity class and the differenced normalized burn ratio (dNBR) at the Hayman Fire (2003), Colorado, USA. Burn severity classes were derived from comparisons of six field severity ranks to dNBR100 at severity plots (n = 252). The overall classification accuracy was 68.7 %.

From: American Three-Toed Woodpecker Response to Burn Severity and Prey Availability at Multiple Spatial Scales

Burn severity class

 

Unburned

Low

Moderate

Moderate-high

High

Field severity

0 %

<33 % crown

33 % to 67 %

>67 % crown

>50 % crown

rank

tree scorch

scorcha

crown scorch

scorch

consumed

dNBR100 b

≤100

101 to 200

201 to 400

401 to 500

>500

Classification accuracyc

95.1 %

66.7 %

50.0 %

34.4 %

58.8 %

  1. a Field severity ranks (bole scorch and <33 % crown scorch) were pooled because of substantial overlap in dNBR100
  2. b dNBR100 is the mean dNBR score in 100 m buffers surrounding severity plot centers.
  3. c % Classification Accuracy = (number correctly predicted samples in burn severity class) ÷ (total number samples in class).
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