Research shows aspen forests slow wildfire spread

by Colorado State University
July 15, 2025

A new study from Colorado State University, Western Colorado University and the U.S. Forest Service found evidence that stands of aspen trees could resist wildfires by slowing a fire’s advance or changing its course.

The researchers found that even modest increases in aspen cover dramatically reduced the rate at which fires spread. Their findings suggest that aspen forests can act as natural firebreaks, which is valuable information for land managers and agencies.

“Where managers can encourage aspen over conifers, they may represent a more desirable fuel treatment in some forest types than traditional thinning or shaded firebreaks because of the aesthetic value and wildlife habitat aspen provide,” said Camille Stevens-Rumann, study principal investigator and interim director of the Colorado Forest Restoration Institute at CSU.

The study, published July 7 in Ecological Applications, analyzed 20 years of fire behavior across more than 300 wildfires in the Four Corners region.

Keep reading: https://source.colostate.edu/aspen-forests-slow-wildfire-spread/

Read the Ecological Applications paper: https://esajournals.onlinelibrary.wiley.com/doi/10.1002/eap.70061