Sarah Tharp, a wiry biologist for the U.S. Forest Service, hoists a small ax, takes aim and delivers an angled blow to an aspen trunk, peeling off a sample of diseased bark. "Sometimes," she says ...

Remember that aspen roots thrust up numerous shoots or stems that look like individual trees but are parts of a single clonal individual. Separate clones can be distinguished with characters such as ...

These growths were usually covered with unbroken aspen bark. But some were leaking dark fluid that stained the bark. The dark fluid is the exudate from a Cytospora canker, a common fungus.

I wanted to find out what the powder found on aspen tree bark was made of. I asked Erin, who suggested the question was to her knowledge an unanswered one. I immediately signed up for independent ...

Fire in the forest is the primary threat to a grove of quaking aspen. Fire easily kills the thin bark of the tree and even a light fire can injure the bark, allowing a decaying fungus to enter.

A Bit of Background on Bark Beetles Large infestations of the destructive bark beetle have become more frequent — and there's really no way to save trees once a large outbreak occurs.

Young aspen bark provides seasonal food for the hare and other animals in early spring and aspen is also a tree of choice for the beaver. Browsing of aspen suckers may be a major problem because ...

Additionally, aspen bark can photosynthesize at 30%-50% of the capability of its leaves, according to the Colorado Native Plant Society. What may appear to be an entire grove of aspen trees is ...

ASPEN, Colo. (AP) - The cost of fighting bark beetles is rising. Forest supervisor Scott Fitzwilliams tells the Aspen Times that the White River National Forest spent $10.4 million last year to ...