“Numerous animals, from Douglas squirrels to an assortment of tiny insects, as well as mosses, lichens, ferns, and other plants and fungi, all make their homes in living Douglas fir trees. When one of these mighty trees dies and falls to the forest floor, it becomes a nurse log—that is, a huge decaying hunk of wood that feeds countless living beings with its fibers and the nutrients therein. A tree sucks up a lot of resources in its lifetime, and when it dies, all those resources are released back into the ecosystem at large to be used by other beings.”