Do Lichens Cause Harm to Trees?

It really looks like hair!! Witch’s-hair lichen hangs in long strands from the trunk and branches of trees. This lichen depends on healthy old trees, cool moist conditions, and clean air, which are conditions found mostly in intact old-growth forests. In winter, when deep snow covers other plants, mountain caribou rely on these lichens for their primary food source.Mountain caribou are one of the most endangered mammals in Canada. Southern mountain caribou herds have declined sharply due to habi