Aspen has distinctive, almost-circular leaves with flattened petioles or stems. This flattening causes the leaves to tremble or flutter in the slightest breeze, thereby giving the tree one of its most ...

Young aspens often don't survive because of factors such as grazing elk, according to a study by Northern Arizona University ...

Aspen form individual patches comprised of numerous stems, termed ramets, each with its own trunk, branches, leaves and a shared root system (Figure 2). All of these structures arose from a single ...

Aspen is highly valued by beavers, who returned to the Cairngorms last year, 400 years after they were driven to extinction in Scotland. It is also an important defence against climate change, as it ...

FLAGSTAFF — Beneath the scenic yellow and red leaves of soaring aspen trees in the Kachina Wilderness, forest ecologist Mike Stoddard is looking down. His concern isn’t the brilliant fall ...