The Importance of Hemlocks

The Importance of Hemlocks

Hemlocks play an important role in the ecology and hydrology of mountain ecosystems. They offer critical habitat for birds. As many as 90 species can be found in hemlock forests. A few, mostly songbirds, seem particularly associated with hemlocks: the…

Factors Threatening the Appalachian Hemlock

Factors Threatening the Appalachian Hemlock

The Northeastern United States is home to the Appalachian Hemlock Forests of which many are currently threatened by the woolly adelgid, an invasive insect that destroys eastern hemlock trees. As average global temperatures continue to climb, infestations of the hemlock…

The Woolly Adelgid

The Woolly Adelgid

The hemlock woolly adelgid (HWA) Adelges tsugae was first described in western North America in 1924 and first reported in the eastern United States in 1951 near Richmond, VA. Research scientists using molecular genetics have recently determined that several distinct…