Mixed-Aged Stands: Almost all of the conifers that survived the Vision Fire are Douglas firs. Over time, with a series of fires, Douglas fir forests become a diverse group of mixed-age stands. Fire scars on these trees indicate flame length and the direction the fire was moving. When heat penetrates bark, the inner cambium layer is damaged, creating scars within the growth rings. From tree rings, we have learned that some Douglas firs on Inverness Ridge are up to 400 years old, and have lived through many fires.
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