31/08/2026
One of the many ways climate change is affecting the Renfrew County Forest is through drought-related tree mortality. Since the severe drought of 2012, we've seen an increasing decline of red pine growing on shallow soils.
One example can be found at Germanicus Tract, where a red pine plantation near the road began declining rapidly after the 2012 drought. An investigation showed the affected trees were growing on very shallow soil over bedrock, leaving them especially vulnerable during prolonged dry periods.
Drought often doesn't kill trees on its own. Instead, it weakens them, allowing naturally occurring pathogens like Armillaria Root Rot to take hold. The fungus spreads underground through root systems, creating expanding patches of dead and dying trees. In some cases, blue stain fungi invade the wood before the tree has even died, making it unsalvageable.
Over the past decade, we've increased monitoring of these susceptible sites during dry years. Sometimes this means harvesting red pine plantations earlier than planned to recover value before the wood deteriorates. As these sites are regenerated, we're favouring more drought-tolerant species like oak while keeping a close eye on research from the Friends of the Petawawa Research Forest and the Forest Gene Conservation Association.
Forestry has always been about planning for the future. As our climate changes, that future means adapting our forests to the conditions they'll face in the decades ahead.