Fire suppression in Jasper National Park has led to forests becoming more uniform due to a lack of varied fire intensities. By studying tree rings, researchers found that most sites had a mix of low and high-severity fires in the past, but now many areas only experience high-severity fires. This has caused forests to age at the same rate, making them more susceptible to severe fires. The dominance of certain tree species in the understory further contributes to this homogenization. To restore forest health and resilience, proactive fire management is needed to reintroduce a more diverse fire regime.