Study Finds Aspen Stands Halve Fire Exposure in Canada, Slowing 2023-Style Wildfires
Updated
Updated · Livescience.com · Aug 3
Study Finds Aspen Stands Halve Fire Exposure in Canada, Slowing 2023-Style Wildfires
2 articles · Updated · Livescience.com · Aug 3
Summary
Aspen stands appeared more than twice as often on wildfire perimeters as inside burn zones in Canada, indicating they help contain fires rather than fuel them.
Satellite and forest-species maps from three recent fire years, including record 2023, showed areas with more aspen also saw less forest burn each day, suggesting slower fire spread.
Researchers said the effect likely comes from moist leaves and undergrowth, low resin content and taller leaf placement that makes crown-to-crown ignition harder; the resistance persisted even in spring before full leaf-out.
The findings support planting deciduous buffers 100 to 300 meters deep around communities and challenge forestry practices that remove aspen with glyphosate to favor conifer monocultures.