One aspen tree is actually only a small part of a larger organism. A stand or group of aspen trees is considered a singular organism with the main life force underground in the extensive root system. Before a single aspen trunk appears above the surface, the root system may lie dormant for many years until the conditions are just right, including sufficient sunlight. In a single stand, each tree is a genetic replicate of the other, hence the name a “clone” of aspens used to describe a stand.
An interesting fact is that aspens grow all the time—even in winter. Beneath the thin, white outer bark layer is a thin green photosynthetic layer that allows the tree to create sugars and grow when other deciduous trees would otherwise be dormant. During hard winters, the green, sugary layer provides necessary nutrients for deer and elk. Throughout the year, young aspens provide food or a variety of animals including moose, black bear, beaver, porcupine, ruffed grouse and rodents .