Index Catalog // ScholarsArchive@OSU

Epichloë typhina (fungus) - Botanophila lobata (fly) interaction : an invasive "pollinator" system in its introduced range in western Oregon

Creator:: Kaser, Joseph M.
Abstract:: Epichloë typhina (Ascomycetes: Clavicipitaceae) is an endophytic fungus that infects perennial Pooid grasses and is the causal agent of choke disease. It is endemic to Europe and was inadvertently introduced into orchardgrass seed production fields in western Oregon. Choke disease, which was first recorded in Oregon in 1996, currently infects...
Resource Type:: Masters Thesis
Full Text:: EPICHLOË IN OREGON There are two recorded species of Epichloë in the Willamette Valley: E. festucae

Habitat associations and life histories of odonata in riverine wetlands of the Willamette Valley, Oregon

Creator:: Beatty, Christopher D.
Abstract:: This thesis explored the distributions and life histories of dragonflies and damselflies (Insecta: Odonata) of the riverine wetlands of the Willamette Valley in western Oregon, USA. Odonate species distributions were characterized over two seasons in the autumn of 2000 and the spring of 2001-at twenty-seven wetlands located throughout the valley....
Resource Type:: Masters Thesis
Full Text:: Associations and Life Histories of Odonata in Riverine Wetlands of the Willamette Valley, Oregon Paul C

Effect of riparian areas on the ecological condition of small, perennial streams in agricultural landscapes of the Willamette Valley : research plan, June 1997

Creator:: Moser, Thomas J., Wigington, P.J., Schuft, Michael J., Kaufmann, Phillip R., Herlihy, Alan T., Van Sickle, John, and McAllister, Lynne S.
Abstract:: Little research has been directed toward determining the status and ecological role of riparian areas in agricultural landscapes of the Willamette Valley, Oregon. A research project has been designed to contribute to the development and evaluation of alternative future scenarios and to improve the basic understanding of the role of...
Resource Type:: Technical Report

Butterfly and flower community composition among prairie-oak ecosystem habitats in the Willamette Valley, Oregon

Creator:: Powers, Breanna F.
Abstract:: Prairie-oak ecosystems in the Willamette Valley, Oregon have experienced habitat loss and degradation; most of these ecosystems are fragmented into smaller patches. Prairie-oak butterfly species, in the Willamette Valley, have decreased dramatically due to loss or degradation of habitat. More research is needed on sustaining the populations of butterflies in...
Resource Type:: Masters Thesis
Full Text:: Edge Prairie-oak ecosystems in the Willamette Valley, Oregon have experienced habitat loss

Synecology of the white-oak (Quercus garryana Douglas) woodlands of the Willamette Valley, Oregon

Creator:: Thilenius, John F., 1931-
Abstract:: Quercus garryana dominated plant communities are found in the interior coastal valleys and on foothills from southeastern Vancouver Island, British Columbia, south to San Francisco, California. They occur as savannas, intermixed with a variety of conifers, and in almost pure stands. The diversity of habitats occupied by the species and...
Resource Type:: Dissertation
Full Text:: ) woodlands of the Willamette valley, Oregon AN ABSTRACT OF THE THESIS OF JOHN FREDRICK THILENIUS for the

Determinants of microbial community structure and substrate utilization potential in soils of vegetable cropping systems

Creator:: Schutter, Mary E.
Abstract:: The Oregon Long-Term Soil Quality Project was initiated to identify soil properties that respond rapidly to alternative management practices. Such practices included winter cover cropping, which was implemented at two experimental research stations and several grower fields throughout the Willamette Valley. The goal of this thesis was to identify the...
Resource Type:: Dissertation
Full Text:: the Willamette Valley. The goal of this thesis was to identify the major impacts of cover cropping on

Multiscale relationships of wintering birds with riparian and wetland habitat in the Willamette Valley, Oregon

Creator:: Adamus, Paul R.
Abstract:: Relatively little is known about wintering bird communities in lowlands of the Pacific Northwest, yet, the condition of winter habitats potentially can pose a major constraint on bird populations. I initiated a study to determine: (1) Which avian species use lowland riparian and wetland habitats in the Willamette Valley during...
Resource Type:: Dissertation
Full Text:: Relationships of Wintering Birds with Riparian and Wetland Habitat in the Willamette Valley, Oregon Abstract

Influence of wetland landscape structure of shorebirds wintering in an agricultural valley

Creator:: Taft, Oriane Williams
Abstract:: Understanding how wetland birds use habitat is pivotal to developing successful and beneficial conservation strategies. Although it has been an ardent topic in forest research for some time, how species interact with the spatial patterning of habitat across a landscape (i.e., landscape structure) has been more or less neglected in...
Resource Type:: Dissertation
Full Text:: examines these questions for the Willamette Valley ("Valley") of northwestern Oregon, USA. The Valley is

Conserving avian diversity in agricultural systems : the role of isolated Oregon white oak legacy trees

Creator:: DeMars, Craig A.
Abstract:: Over one third of the earth’s land surface has been modified to some extent for agricultural purposes. The large global footprint of agriculture, combined with the knowledge that existing reserve networks are likely insufficient for long-term conservation of native biodiversity, has necessitated that agricultural systems contribute to conservation of native...
Resource Type:: Masters Thesis
Full Text:: caterpillars detected using isolated white oak legacy trees in the Willamette Valley, Oregon during

Bird Abundance and Microhabitat Associations with Oak Mistletoe in Willamette Valley Oak Woodlands

Creator:: Pritchard, Kyle R.
Abstract:: In the last 200 years there have been significant declines in the amount and structural complexity of oak-dominated forests and savannahs in the Pacific Northwest. Restoring oak systems often involves selectively thinning stands of oaks in order to reduce competition for sunlight. In choosing which trees to cut, land managers...
Resource Type:: Masters Thesis
Full Text:: they were quantified for Oregon White Oak in the Willamette Valley

ScholarsArchive@OSU

Epichloë typhina (fungus) - Botanophila lobata (fly) interaction : an invasive "pollinator" system in its introduced range in western Oregon

Habitat associations and life histories of odonata in riverine wetlands of the Willamette Valley, Oregon

Effect of riparian areas on the ecological condition of small, perennial streams in agricultural landscapes of the Willamette Valley : research plan, June 1997

Butterfly and flower community composition among prairie-oak ecosystem habitats in the Willamette Valley, Oregon

Synecology of the white-oak (Quercus garryana Douglas) woodlands of the Willamette Valley, Oregon

Determinants of microbial community structure and substrate utilization potential in soils of vegetable cropping systems

Multiscale relationships of wintering birds with riparian and wetland habitat in the Willamette Valley, Oregon

Influence of wetland landscape structure of shorebirds wintering in an agricultural valley

Conserving avian diversity in agricultural systems : the role of isolated Oregon white oak legacy trees

Bird Abundance and Microhabitat Associations with Oak Mistletoe in Willamette Valley Oak Woodlands

Limit your search

Academic Affiliation

Advisor

Commencement Year

Committee Member

Conference Name

Creator

Contributor

Date

Decade

Degree Field

Degree Level

Degree Name

File Format

Language

License

Location

Non-Academic Affiliation

Peer Reviewed

Resource Type

Rights Statement

Subject

Search Constraints

Search Results

Limit your search