Post-fire vegetation and fuel development influences fire severity patterns in reburns
The authors sampled field plots that reburned to examine how biophysical characteristics, topography, fire weather, time-since-fire, and initial fire severity affected subsequent reburn severity
The authors found that areas that burned initially as high- or moderate-severity fire were more likely to reburn at high severity due to the increase in snags and shrub vegetation as a result of the first fire entry. Average daytime temperature was the most important predictor of high severity fire in the reburn. When temperatures exceeded a threshold of >27.3°C (81°F), snag basal area and shrub cover were the strongest variable driving reburn severity patterns. They also found that as time between fires increased, severity also increased.