Index Catalog // ScholarsArchive@OSU

Fifty years of change in a Pacific Northwest winter forest bird community

Creator:: Clements, Nolan
Abstract:: North American bird populations have declined throughout the past half century. The majority of studies quantifying these declines have focused on spring and summer breeding birds; not the season of scarcity, winter. We re-surveyed 7 large study plots in Douglas fir forests initially surveyed in winter during the late 1960s...
Resource Type:: Honors College Thesis
Full Text:: : _____________________________________________________ W. Douglas Robinson North American bird populations have declined throughout the

Human Alteration of a Neotropical Landscape Drives Long-term Changes in its Forest Bird Communities

Creator:: Curtis, Jenna R.
Abstract:: Human alteration of natural landscapes leads to biodiversity loss, often from a combination of area effects and fragmentation effects. Smaller habitat patches support fewer species than large ones and incur additional consequences from isolation. Efforts to preempt biodiversity loss from insular habitat fragments are complicated by individualistic species responses and...
Resource Type:: Dissertation
Full Text:: : ______________________________________________________________________________ W. Douglas Robinson Human alteration of natural landscapes leads to biodiversity loss

Ecology and distribution of red crossbill call types in western Oregon

Creator:: Centanni, Caleb
Abstract:: Red Crossbills (Fringillidae: Loxia curvirostra), irruptive finches which feed on conifer seeds, have long presented an evolutionary conundrum. Variable morphology and vocalizations in the species can be classified into several flight call types, which may be discrete lineages. The key conifer hypothesis suggests that each type diverged by specializing on...
Resource Type:: Honors College Thesis
Full Text:: E. of Outer Coast, W. of Willamette, Elev. over 120 m, North of 43.8 degrees N Douglas-fir, western

Modeling Fine-scale Avian Distributions and Densities with Multi-scale Models: Predicting the Past and Present

Creator:: Hallman, Tyler A.
Abstract:: Models of a species’ distribution and models of a species’ spatially explicit density are valuable tools for conservation. They allow researchers to estimate changes in distributions, densities, and populations, based on changing environmental conditions. To trust such estimates, however, the quality of models is exceedingly important. Model performance can be...
Resource Type:: Dissertation
Full Text:: : ______________________________________________________ W. Douglas Robinson Models of a species’ distribution and models of a species

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:: : _____________________________________________________________ W. Douglas Robinson High severity fire is a historical and integral disturbance

Songbird Mobbing of Northern Pygmy-Owls: A Function of Risk Across Landscapes and Seasons

Creator:: Scott, Madeleine
Abstract:: The evolutionary arms race between predators and prey has led to a diverse set of interactions between species. Prey have developed an array of behaviors designed to reduce their risk of predation. Among those strategies, mobbing is a paradoxical behavior where prey actually approach predators, often in large multi-species flocks....
Resource Type:: Masters Thesis
Full Text:: : ______________________________________________________ W. Douglas Robinson The evolutionary arms race between predators and prey has led to a

Greater sage-grouse movements and habitat use during winter in central Oregon

Creator:: Bruce, Jennifer R.
Abstract:: Greater sage-grouse (Centrocercus urophasianus), a sagebrush obligate species, has contracted in extent by nearly half its original distribution. This is primarily due to habitat loss and degradation over the past 150 years. During winter, sage-grouse depend completely on sagebrush habitat for food and cover, yet sage-grouse winter ecology has been...
Resource Type:: Masters Thesis
Full Text:: Oregon Abstract approved:______________________________________________________ W. Douglas

Survival and nest site characteristics of translocated mountain quail on Steens Mountain, Oregon

Creator:: Nelson, Jamie N.
Abstract:: Mountain Quail (Oreortyx pictus) populations have declined in the eastern portion of their range during the last century. However, few studies have investigated the nesting habitat and survival of Mountain Quail translocated into an area from which they have been extirpated. We translocated 217 wild Mountain Quail (Oreortyx pictus) from...
Resource Type:: Masters Thesis
Full Text:: approved: _____________________________________________________________________ W. Douglas Robinson

Songbird feathers as indicators of mercury exposure : Patterns across feather tracts and correlations to other tissues

Creator:: Low, Katherine E.
Abstract:: Monitoring mercury (Hg) exposure in avian populations is critical to understanding the effects of this neurotoxin. Avian Hg exposure is commonly evaluated by measuring Hg concentrations in internal tissues, blood, and feathers. Feathers are a popular sampling matrix due to ease of sampling and limited stress to birds. However, it...
Resource Type:: Honors College Thesis
Full Text:: : _____________________________________________________ W. Douglas Robinson Monitoring mercury (Hg) exposure in avian populations is critical to

Small mammal and bird abundance in relation to post-fire habitat succession in mountain big sagebrush (Artemisia tridentata ssp. vaseyana) communities

Creator:: Holmes, Aaron L.
Abstract:: Fire is an important disturbance mechanism in big sagebrush (Artemisia tridentata) communities, yet little is known about wildlife population dynamics during post-fire habitat succession. I estimated the abundance of small mammals and birds in relation to fire history in mountain big sagebrush (A.t. spp. vaseyana) communities on the Sheldon National...
Resource Type:: Dissertation
Full Text:: Professor, W. Douglas Robinson for his support, encouragement, and trust, all of which made this project

ScholarsArchive@OSU

Fifty years of change in a Pacific Northwest winter forest bird community

Human Alteration of a Neotropical Landscape Drives Long-term Changes in its Forest Bird Communities

Ecology and distribution of red crossbill call types in western Oregon

Modeling Fine-scale Avian Distributions and Densities with Multi-scale Models: Predicting the Past and Present

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

Songbird Mobbing of Northern Pygmy-Owls: A Function of Risk Across Landscapes and Seasons

Greater sage-grouse movements and habitat use during winter in central Oregon

Survival and nest site characteristics of translocated mountain quail on Steens Mountain, Oregon

Songbird feathers as indicators of mercury exposure : Patterns across feather tracts and correlations to other tissues

Small mammal and bird abundance in relation to post-fire habitat succession in mountain big sagebrush (Artemisia tridentata ssp. vaseyana) communities

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