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Influences of riparian canopy on aquatic communities in high desert streams of eastern Oregon

Creator:: Tait, Cynthia K.
Abstract:: Because riparian canopy controls most energy inputs to stream ecosystems, it directly affects the structure of aquatic food webs and the ecological processes that govern interactions among trophic levels. This study addresses the interdependence among riparian canopy, benthic community structure, and the carrying capacity of high desert streams for salmonid...
Resource Type:: Dissertation
Full Text:: Riparian Canopy on Aquatic Communities in High Desert Streams of Eastern Oregon. Abstract approved

Germination and first-year survival of red alder seedlings in the central Coast Range of Oregon

Creator:: Haeussler, Sybille
Abstract:: The role of disturbance in seed germination and first-year survival of red alder (Alnus rubra) was studied over two growing seasons at four sites representing a climatic gradient within the central Coast Range of Oregon. Disturbance affected red alder seed germination and seedling establishment by altering the temperature and moisture...
Resource Type:: Masters Thesis

A characterization of unmanaged riparian overstories in the central Oregon Coast Range

Creator:: Nierenberg, Tara R.
Abstract:: Riparian areas that can be used as reference sites on which to base goals of vegetation restoration have not been documented in the Oregon Coast Range. I examined the composition and distribution of unmanaged riparian overstories in the central Oregon Coast Range along nine streams which have experienced minimal disturbance...
Resource Type:: Masters Thesis

Estimating ground cover via spectral data

Creator:: Axness, Daniel S.
Abstract:: Potato ground cover and spectral data were measured in the Columbia Basin during the 1990 growing season. Three spectral were correlated with ground cover; normalized difference, near infrared-red ratio, and the first derivative of the spectral curve at 750 nm. All models were statistically significant at the 99% level. Normalized...
Resource Type:: Masters Thesis
Full Text:: ground cover and canopy reflectance was studied under field conditions in Eastern Oregon during the

Vegetation changes of communities containing medusahead (Taeniatherum asperum (Sim.) Nevski) following herbicide, grazing, and mowing treatments

Creator:: Turner, Robert Bruce
Abstract:: Studies were conducted from 1962 to 1966 to investigate the effectiveness of several practices in manipulating medusahead (Taeniatherum asperum (Sim. ) Nevski) infested and/or dominated ecosystems by releasing competition in favor of perennial grasses. Several herbicide treatments were evaluated for selective control of medusahead and cheatgrass (Bromus tectorum L. )...
Resource Type:: Dissertation
Full Text:: River hills of eastern Oregon. On foothill range in western Oregon, sheep grazing and mow- ing

A preliminary phytochemical investigation of Ephedra viridis Coville found in Oregon

Creator:: Aragones, Erlinda Negre
Abstract:: A species of Ephedra found in southeastern Oregon, identified as Ephedra viridis Coville is reported of medicinal value among the American Indian tribes and other dwellers of that locality in various affections such as venereal diseases, kidney and bladder disturbances, in stomach ulcers and abdominal pains, in delayed menstruation, as...
Resource Type:: Masters Thesis

Poisonous forage plants on the Oregon ranges

Creator:: Lewis, Robert S.
Resource Type:: Undergraduate Thesis
Full Text:: CORVALLIS, OREGON to nine percent of their weight before showing symptoms. The effects of the plant are not

A study of seasonal variation of the composition of forage plants of southeastern Oregon

Creator:: Jensen, Horace
Resource Type:: Masters Thesis
Full Text:: plants of southeastern Oregon (Nam) AN ABSTRACT OF THE THESIS OF Animal Huabandi'y - for (Degree

Some factors affecting the establishment and growth of improved forage species on Laughlin-like soils in western Oregon

Creator:: Valassis, Vlassios Thomas
Resource Type:: Dissertation
Full Text:: improved forage species on Laughlin-like soils in Western Oregon SOME FACTORS A'FECTING THE ESTABLISHMENT

The seasonal yield, quality, and utilization of Trifolium subterraneum in mixture with festuca arundinacea and Lolium perenne in western Oregon

Creator:: Sanders, Kenneth D. (Kenneth Dwayne), 1940-
Abstract:: In 1959, a large scale grazing study in western Oregon was initiated to compare the value of perennial ryegrass (Lolium perenne L.) with subclover (Trifolium subterraneum L.) and tall fescue (Festuca arundinacea Schreb.) with subclover, and to evaluate common use grazing on them. The present investigation was undertaken to determine...
Resource Type:: Masters Thesis
Full Text:: AND LOLIUM PERENNE IN WESTERN OREGON Abstract approve (Ma3or Professor) In 1959, a large scale

ScholarsArchive@OSU

Influences of riparian canopy on aquatic communities in high desert streams of eastern Oregon

Germination and first-year survival of red alder seedlings in the central Coast Range of Oregon

A characterization of unmanaged riparian overstories in the central Oregon Coast Range

Estimating ground cover via spectral data

Vegetation changes of communities containing medusahead (Taeniatherum asperum (Sim.) Nevski) following herbicide, grazing, and mowing treatments

A preliminary phytochemical investigation of Ephedra viridis Coville found in Oregon

Poisonous forage plants on the Oregon ranges

A study of seasonal variation of the composition of forage plants of southeastern Oregon

Some factors affecting the establishment and growth of improved forage species on Laughlin-like soils in western Oregon

The seasonal yield, quality, and utilization of Trifolium subterraneum in mixture with festuca arundinacea and Lolium perenne in western Oregon

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