Because the spongy moth caterpillar ends its leaf-eating spree relatively early in the aspen tree's growing season, the defoliated trees produce a second flush of leaves to capture enough energy ...

Angel Watkins and co-workers in Colorado blame many culprits in the decline of the Aspen. JT Thomas It's a relentlessly sunny day in the Rocky Mountains, and here at 9,000 feet, on the Grand Mesa ...

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

The ability of aspen to produce whole stands of "trees" vegetatively provides yet ... Why do quaking aspen leaves quake and tremble? The leaves of this species quake, shake and tremble in the ...