Full Citation: Parks, Sean A.; Dobrowski, Solomon Z.; Panunto, Matthew H. 2018. What drives low-severity fire in the southwestern USA? Forests 9(4):165.
External Identifier(s): 10.3390/f9040165 Digital Object Identifier
Location: Arizona and New Mexico, U.S.
Ecosystem types: Dry-conifer forests; piñyon-juniper woodland; ponderosa pine forests; savannah
Southwest FireCLIME Keywords: None
Tags: Fuel moisture
FRAMES Keywords: fire severity, burn severity, wildland fire, wildfires, fire regime, fire refugia, forests

What drives low-severity fire in the southwestern USA?

Sean A. Parks, Solomon Z. Dobrowski, Matthew Panunto


Summary - what did the authors do and why?

The authors evaluated both climate and biophysical factors that influence the occurrence of low severity fire in the Southwest. Low severity fire is an important component of many high frequency, fire-adapted ecosystems in the southwest, so understanding those conditions which promote low severity fire is highly relevant to land managers.


Publication findings:

The presence of live fuel was the most influential factor in predicting low-severity fire followed by year-of-fire climate. They found that as live fuel decreased, the likelihood of low-severity fire increased, i.e. a reduction in fuel reduced fire severity. Low severity fire also increased as temperatures and the climatic moisture deficit decreased. Topography and longer-term climate factors were not important predictors of low-severity fire.

Climate and Fire Linkages

The presence of live fuel was the most influential factor in predicting low-severity fire followed by year-of-fire climate. Low severity fire increased as temperatures and the climatic moisture deficit decreased. Topography and longer-term climate factors were not important predictors of low-severity fire.

The presence of live fuel was the most influential factor in predicting low-severity fire followed by year-of-fire climate. Low severity fire also increased as temperatures and the climatic moisture deficit decreased. Topography and longer-term climate factors were not important predictors of low-severity fire.

Fire and Ecosystem Effects Linkages

The presence of live fuel was the most influential factor in predicting low-severity fire followed by year-of-fire climate. They found that as live fuel decreased, the likelihood of low-severity fire increased, i.e. a reduction in fuel reduced fire severity.