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Filtering by: Subject Western water hemlock Committee Member Shaw, David C.

Impacts of dwarf mistletoe on the physiology of host Tsuga heterophylla trees as recorded in tree ring C and O stable isotopes

Creator:

Marias, Danielle E.

Abstract:

Dwarf mistletoes, obligate, parasitic plants with diminutive aerial shoots, have long-term effects on host tree water relations, hydraulic architecture, and photosynthetic gas exchange and can eventually lead to tree death. To investigate the long-term impacts of dwarf mistletoe on gas exchange of host western hemlock trees, I compared growth, gas...

Resource Type:

Masters Thesis

Full Text:

related to interception of water and fixed carbon. Water use of western hemlock (Tsuga heterophylla
Pathogenicity of Phytophthora species from Oregon waterways

Creator:

Navarro, Sarah M.

Abstract:

Described as one of the most destructive pathogens of agricultural crops and forest trees, Phytophthora is a genus of microorganisms containing over 100 known species. Phytophthora alni has caused collar and root disease in alders throughout Europe and a form of the species has recently been isolated in North America....

Resource Type:

Masters Thesis

Full Text:

conifers include: Douglas-fir (Pseudotsuga menziesii), western hemlock (Tsuga heterophylla), western