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Filtering by: Creator Elliott, Catherine Decade 2000-2009 Degree Field Forest Science

Vegetation response following thinning in young Douglas-fir forests of western Oregon : can thinning accelerate development of late-successional structure and composition?

Creator:

Beggs, Liane R.

Abstract:

Across western Oregon, Washington, and British Columbia, forest management practices over the past century reduced the amount of late-successional forest while simultaneously increasing the amount of young (less than 80 years old), managed Douglas-fir (Pseudotsuga menziesii) dominated forests. Recently, concerns over loss of late-successional habitat pushed management objectives on public...

Resource Type:

Masters Thesis

Full Text:

of Dr. Catherine Parks, U.S. Forest Service, LaGrande Oregon. Collaborative Arrangements Dr
Predators associated with hemlock woolly adelgid (Hemiptera: Adelgidae) infested western hemlock in the Pacific Northwest.

Creator:

Kohler, Glenn R.

Abstract:

The hemlock woolly adelgid, Adelges tsugae, is causing widespread mortality of eastern hemlock, Tsuga canadensis, in the eastern United States. In the West, A. tsugae causes negligible damage to western hemlock, Tsuga heterophylla. Host tolerance traits and presence of endemic predators may be contributing to the relative tolerance of western...

Resource Type:

Masters Thesis

Full Text:

, Joseph McHugh, Norm Penny, Alistair Ramsdale, Roy Snelling, Catherine Tauber, Margaret Thayer