Invasive Grasses May be Turning B.C.’s Burn Scars into the Next Wildfire

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After a wildfire, the flames may fade, but the danger does not.

After a wildfire, the flames may fade, but the danger does not. A new study by UBC researchers reveals that burned landscapes remain vulnerable for years, with large areas still bare and at risk of invasion by fast-growing, fire-prone grasses.

The research, one of the largest vegetation trajectory studies in the world, monitored landscapes two years after major wildfires in interior B.C. While some native plants returned, recovery was slower and more fragile than expected.

One of the most pressing concerns is invasive grasses, which germinate early in spring, dry out during the hottest months, and act as dry runways that spread flames at highway speed—a dynamic that contributed to the 2023 Lahaina fire in Maui and is increasingly likely in B.C.’s Interior.

Read More: University of British Columbia

Photo Credit: University of British Columbia