This bark lives and carries out photosynthesis, attributes that make it unique among North American trees and likely contribute to its impressive geographic range (Figure 1). Aspen form individual ...

in preference to other trees, felling them to build its dams and lodges, which provide a habitat for many species of aquatic organisms. Aspen has a very large native range, occurring from Japan ...

Once the living aspen trees die, there may not be any new growth to take their place. Aspens are the most widely distributed trees in North America, and their most southern range occurs in pockets ...