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60 years of avian community change in the Willamette Valley, Oregon

Creator:: Curtis, Jenna
Abstract:: Birds perform valuable ecological functions and are useful environmental indicators. Avian distributions and diversity are predicted to change over the next 50 years. Little information exists on the role of local and regional conditions in fluctuations of avian communities over time. Historic datasets present a legacy of information that helps...
Resource Type:: Masters Thesis

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

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

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

Population and occurrence of birds in varying cover types of the Willamette Valley

Creator:: Buchanan, Robert Leland
Resource Type:: Masters Thesis
Full Text:: of the Willamette Valley POPULATION AND OCCURRENCE OF BIRDS IN VARYING COVER TYPES OF rHE

A study of the food habits of the waterfowl of the Willamette Valley, Oregon

Creator:: Crawford, Eugene Edward
Resource Type:: Masters Thesis
Full Text:: Willamette Valley, Oregon AN ABSTRACT 0F THE THESIS 0F i4*À for the - ----- in_.i _'_M,t0 (Iqame

Cavity resources in Oregon white oak and Douglas-fir stands in the mid-Willamette Valley, Oregon

Creator:: Gumtow-Farrior, Daniel L.
Abstract:: Previous studies of bird communities in the mid-Willamette Valley, Oregon, indicated that Oregon white oak (Ouercus garryana) stands supported more cavity-using bird species than sympatric stands of Douglas-fir (Pseudotsuga menziesii). Mature Oregon oak stands are being harvested and few are regenerating. I compared cavity availability for hole-using fauna among 10...
Resource Type:: Masters Thesis

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

ScholarsArchive@OSU

60 years of avian community change in the Willamette Valley, Oregon

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

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

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

Population and occurrence of birds in varying cover types of the Willamette Valley

A study of the food habits of the waterfowl of the Willamette Valley, Oregon

Cavity resources in Oregon white oak and Douglas-fir stands in the mid-Willamette Valley, 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

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