Index Catalog // ScholarsArchive@OSU

Innate behavioral responses to extirpated mammalian apex predators : can fear be utilized to manage populations and protect sensitive habitats

Creator:: Ruch, Zachary
Abstract:: I conducted a field study using gray wolf and mountain lion urine to investigate white-tailed deer and mesopredator behavioral responses to novel predator cues in a natural setting and to see if any changes in wildlife activity correspond to changes in the local biodiversity of a wetland environment. I created...
Resource Type:: Capstone Project

Predator Conservation and Trophic Ecology

Creator:: Wolf, Christopher
Abstract:: Many of Earth’s terrestrial large carnivore species are threatened with extinction. As a result, some of the ecological effects associated with these species may be lost. With the goal of furthering large carnivore conservation research, I conduct three global scale analyses involving these species. First, I explore prey depletion as...
Resource Type:: Dissertation

Trophic cascades and large mammals in the Yellowstone ecosystem

Creator:: Painter, Luke E.
Abstract:: Reintroduction of wolves to Yellowstone National Park (YNP) in 1995-96 provided a rare opportunity to observe the response of an ecosystem to the return of a top predator, including possible reversal of decades of decline of aspen, cottonwood, and tall willows suppressed by intensive herbivory on elk winter ranges. To...
Resource Type:: Dissertation

Landscape composition around northern spotted owl nests, central Cascade Mountains, Oregon

Creator:: Swindle, Keith A.
Abstract:: This study describes the composition of forest landscapes surrounding northern spotted owl (Strix occidentalis caurina) nests in the central Cascade Mountains of Oregon. I compared forest composition around 126 owl nests in 70 pair territories with forest composition around 119 points drawn randomly from all terrestrial cover-types, and around 104...
Resource Type:: Masters Thesis

Quaking aspen persistence in three Oregon landscapes

Creator:: Seager, S. Trent
Abstract:: Quaking aspen (Populus tremuloides) is an important tree species in the western United States and there has been much concern about its persistence. In this thesis, I report on aspen in a portion of its range that has not been previously evaluated: the eastern and western slopes of the Central...
Resource Type:: Masters Thesis

Hierarchical analysis of spatial pattern and processes of Douglas-fir forests using wavelet analysis

Creator:: Bradshaw, G. A.
Abstract:: There has been an increased interest in the quantification of pattern in ecological systems over the past years. This interest is motivated by the desire to construct valid models which extend across many scales. Spatial methods must quantify pattern, discriminate types of pattern, and relate hierarchical phenomena across scales. Wavelet...
Resource Type:: Dissertation

Modeling gray wolf habitat in Oregon using a geographic information system

Creator:: Larsen, Tad
Abstract:: Gray Wolves (Canis lupus) were once found throughout North America including Oregon. Wolves were extirpated from Oregon due to heavy hunting pressure in the late 19th and early 20th centuries and have been absent for over 50 years. Successful reintroduction efforts in Idaho and the greater Yellowstone area have caused...
Resource Type:: Masters Thesis

Land cover at northern spotted owl nest and non-nest sites, east-central Coast Ranges, Oregon

Creator:: Perkins, John P.
Abstract:: This study examined the differences, at various scales, between northern spotted owl (Strix occidentalis caurina) nest sites and non-nest sites, i.e., sites where no nests were found during surveys, in the Coast Ranges of Oregon. I compared land cover around 41 owl nest sites (ONS) and 41 non-nest sites (NNS)...
Resource Type:: Masters Thesis

A landscape-scale analysis of vegetation recovery at Mount St. Helens

Creator:: Lawrence, Rick L.
Abstract:: I used satellite remote sensing to examine the key factors controlling the natural revegetation of Mount St. Helens since its eruption in 1980. The study required three stages: determining the amount of vegetation present; characterizing vegetation change; and analyzing the influence of factors affecting vegetation change. To determine the amount...
Resource Type:: Dissertation

Landscape patterns of pre-logging forest conditions in western Oregon

Creator:: Rasmussen, Mary C.
Abstract:: Using historical maps and tools provided by GJS, the spatial patterns of pre-logging forest conditions were quantified for three landscapes in western Oregon. The spatial coincidence between forest patches and topographic features was determined for slope gradient, aspect, elevation, and distance from streams. Pre-logging and current forest compositions were compared....
Resource Type:: Masters Thesis

ScholarsArchive@OSU

Innate behavioral responses to extirpated mammalian apex predators : can fear be utilized to manage populations and protect sensitive habitats

Predator Conservation and Trophic Ecology

Trophic cascades and large mammals in the Yellowstone ecosystem

Landscape composition around northern spotted owl nests, central Cascade Mountains, Oregon

Quaking aspen persistence in three Oregon landscapes

Hierarchical analysis of spatial pattern and processes of Douglas-fir forests using wavelet analysis

Modeling gray wolf habitat in Oregon using a geographic information system

Land cover at northern spotted owl nest and non-nest sites, east-central Coast Ranges, Oregon

A landscape-scale analysis of vegetation recovery at Mount St. Helens

Landscape patterns of pre-logging forest conditions in western Oregon

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