Index Catalog // ScholarsArchive@OSU

Canyon Grasslands of the Hells Canyon National Recreation Area : How have they changed over time and what is their future trajectory?

Creator:: Pack, Samantha J.
Abstract:: The canyon grasslands of the Hells Canyon National Recreation Area (HCNRA) are a unique ecosystem within the Pacific Northwest Bunchgrass Region (PNWBR) with a long history of natural and anthropogenic disturbances including fire, invasive species introduction, historical livestock grazing, and cultivation. Even with this history, these canyon grasslands contain some...
Resource Type:: Masters Thesis
Full Text:: Lesley Morris for her encouragement and mentorship through this process. Also, thank you to Pat Kennedy

Top-down Influences of bald eagles on common murre populations in Oregon

Creator:: Horton, Cheryl A.
Abstract:: Populations of organisms are influenced by both top-down (predator driven) and bottom-up (environment or resource driven) effects. Seabird research has largely focused on bottom-up factors influencing reproduction, with little emphasis on top-down. Our goal was to better understand top-down impacts on colonial nesting seabirds over a range of spatio-temporal scales....
Resource Type:: Masters Thesis
Full Text:: better mentors. To my committee members, Patricia Kennedy and Julia Jones, thank you for your

Ungulates and Forest Management : Understanding Interactions Between Large Herbivores and Fuels Reduction Treatments on Shrub Assemblages in the Intermountain West

Creator:: Hall Defrees, Dallas K.
Abstract:: Deciduous shrubs are an integral component of mixed conifer forests of the interior Pacific Northwest by providing structural complexity, forage, and niche habitat. Currently, these species are under pressure from high levels of ungulate herbivory and forest management activities such as fuels reduction treatments. Ungulate herbivory is influential in the...
Resource Type:: Masters Thesis
Full Text:: . I would like to acknowledge Patricia Kennedy, Ricardo Mata-Gonzalez and Barbara Lachenbruch as

Influences of high severity fire and postfire logging on avian and small mammal communities of the Siskiyou Mountains, Oregon, USA

Creator:: Fontaine, Joseph B.
Abstract:: High severity fire is a historical and integral disturbance process in coniferous forest types. Compounded disturbances such as multiple fires or post-disturbance management activities are increasingly common, but ecological responses are not well understood and may represent novel types of disturbances. I studied bird and small mammal communities in the...
Resource Type:: Dissertation
Full Text:: committee (Pat Kennedy, Dave Pyke, Alix Gitelman, and Doug Maguire) for their guidance and support

The effects of timber harvest and herbivory on understory vegetation and composition of beef cattle diets on forested rangelands

Creator:: Walburger, Kenric J.
Abstract:: The objectives of the experiment were to: 1) determine the relationship between overstory canopy cover and ungulate herbivory on understory production composition and diversity and 2) determine the effects of timber harvest, ungulate herbivory and season of use on botanical composition and nutritional quality of beef cattle diets. Three randomly...
Resource Type:: Dissertation
Full Text:: members Drs. Martin Vavra, Patricia Kennedy and James Males for their time and constructive criticism

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

A Study of Vegetation Change Over Time in the Salt Marshes of the Salmon River Estuary, Oregon

Creator:: Schrank, Keaton A.
Abstract:: The salt marshes of the Salmon River Estuary, Oregon have been of interest for decades due to their disturbance and restoration history, as well as the presence of long-term vegetation transects that were established as early as the 1970s. Vegetation abundance data have been gathered in the four sites of...
Resource Type:: Masters Thesis
Full Text:: . Robert Kennedy, and Dr. David Bernell for their input and support of this work. Many thanks to Dr

Spatial Association of Humpback Whales (Megaptera novaeangliae) and their Prey in the Southern Gulf of Maine, USA

Creator:: Kirchner, Theresa
Abstract:: Efficient foraging strategies result in a predator spatially overlapping with its prey, foraging in the most profitable patches, and minimizing the time transiting between patches. Previous studies investigating baleen whale foraging strategies have generally focused on investigating spatial overlap with prey patches, patch profitability or movement within feeding grounds. The...
Resource Type:: Masters Thesis
Full Text:: members Elliott Hazen, Leigh Torres, Robert Kennedy and Anthony Klotz who invested their time and energy

Characterization of phenolics in Marion and Evergreen blackberries

Creator:: Siriwoharn, Thanyaporn
Abstract:: Frozen Marion (Rubus sp. hyb) and Evergreen blackberries (Rubus laciniatus) (whole berries, berries without seeds, and seeds alone) were acetone/ chloroform extracted. Phenolics were isolated using C₁₈ cartridges and polyamide resins, then characterized and measured by reversed-phase HPLC/diode array spectral techniques. The Polyamide isolated fractions of Marion berries contained four...
Resource Type:: Masters Thesis
Full Text:: . Remcho, Dr. James A. Kennedy, and Dr. Florian L. Cerklewski, for their advice and support. I

The effects of diisocyanate-polyol resins on the properties of particleboard.

Creator:: Milota, Michael R.
Abstract:: The ability of the resin to deform plastically can be an important factor when considering the mechanical properties of particleboard. Between resin droplets there exists an unbonded region that forms the surface for a crack. When particleboard is deformed stress concentrations develop at the crack tips in the voids. A...
Resource Type:: Masters Thesis

ScholarsArchive@OSU

Canyon Grasslands of the Hells Canyon National Recreation Area : How have they changed over time and what is their future trajectory?

Top-down Influences of bald eagles on common murre populations in Oregon

Ungulates and Forest Management : Understanding Interactions Between Large Herbivores and Fuels Reduction Treatments on Shrub Assemblages in the Intermountain West

Influences of high severity fire and postfire logging on avian and small mammal communities of the Siskiyou Mountains, Oregon, USA

The effects of timber harvest and herbivory on understory vegetation and composition of beef cattle diets on forested rangelands

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

A Study of Vegetation Change Over Time in the Salt Marshes of the Salmon River Estuary, Oregon

Spatial Association of Humpback Whales (Megaptera novaeangliae) and their Prey in the Southern Gulf of Maine, USA

Characterization of phenolics in Marion and Evergreen blackberries

The effects of diisocyanate-polyol resins on the properties of particleboard.

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