Droughts are increasing
Drought is a powerful disturbance agent that can reduce tree growth, increase the vulnerability of trees to insects and diseases, and drive tree mortality. Historically, patchy drought is normal for Canada’s boreal forests. Certain tree species are more drought-resistant than others; for example, jack pine is one of the least vulnerable species to drought. However, if droughts are severe enough, or recur frequently, even the most resilient trees are impacted.
In recent decades, droughts have become more common and are expected to become even more frequent and severe in the future as a result of climate change. Trees experiencing drought are more susceptible to insects and disease, leading to increases in
tree mortality. Drought conditions also greatly increase the risk of wildland fire. In the long-term, drought will impact tree health and regeneration success, and could lead to significant changes in forest ecosystems.
Climate change is reshaping Canada's forests, with rising temperatures and pests altering ecosystems nationwide.
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