With declining populations and low calf recruitment in northeastern Oregon, much interest has been generated to study the survival rates and causes of mortality of Rocky Mountain elk (Cervus elaphus nelsoni). I investigated the causes of elk calf mortality and the effects of predation risk on birth-site selection by cow...
Over the past decade, the business sector has come under increasing pressure to improve their environmental, safety, and health (ESH) performance. This pressure has stemmed from both external and internal sources with the organization. Public image, legislative and regulatory requirements, stakeholder awareness of environmental performance, sustainable development, and changing corporate...
Since the early 1990s, declines in northern spotted owl (Strix occidentalis caurina) populations have been documented through extensive field surveys and range-wide demographic analyses. Although loss of late-successional forest has been credited as the primary cause for spotted owl population declines, environmental variation has also been shown to influence vital...
Field tests are often the most practical method to assess aerobic fitness, but
demonstrate greater error variability than laboratory tests. Researchers can improve
field tests by identifying factors that contribute to systematic error in VO₂max
estimation. PURPOSE: To examine the validity and reliability evidence of two field
tests of aerobic...
West Nile Virus (WNV), a vector-borne disease continues to be a serious threat to public health in the United States, particularly in the Southwest region. While all the states in the U.S. experienced a decreasing trend of WNV disease in 2010, the state of Arizona experienced a sharp increase from...
Nursery-grown seedlings are critical for attaining reforestation and restoration success in many ecosystems, including mixed-conifer forests in the Northwest, which is the native range for Douglas-fir (Pseudotsuga menziesii). Seedling establishment after planting depends on coordinated responses in seedling growth, physiology, and hydraulic function. The chapters in this dissertation review growth...
I studied abundance patterns and habitat use of eight cavitynesting bird species in the Coast Ranges of Western Oregon during the
spring and summer of 1985 and 1986. Three age classes of unmanaged Douglas-fir (Pseudotsuga menziesii) stands were selected for study:
young (40-80 yrs), mature (80-200 yrs), and old-growth (>200...
As a key historic component of prairies in the Pacific Northwest, Camassia spp. should play a role in the restoration of these ecosystems. To do so effectively, further study of Camassia spp. propagation is warranted. Thus, the growth, N uptake and allocation, and seasonal thermoperiodicity of Camassia spp. was examined....
The federally threatened northern spotted owl (Strix occidentalis caurina) is the focus of intensive conservation efforts that have led to much forested land being reserved as habitat for the owl and associated wildlife species throughout the Pacific Northwest of the United States. Recently, however, a relatively new threat to spotted...
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Robert G. Anthony Eric D. Forsman
The federally threatened northern spotted owl (Strix
Several large wildfires in southwestern Oregon during the summers of 2001 and 2002 provided the opportunity to investigate the impacts of wildfire on northern spotted owls (Strix occidentalis caurina). I used radio-telemetry and demographic surveys to describe demographic performance and habitat selection of spotted owls in the areas burned by...
Northern Spotted Owls (Strix occidentalis caurina) inhabit productive forests that historically supported frequent, large, variable-severity fires in the Klamath province of southwestern Oregon occur in complex. The potential for high-severity wildfire remains high throughout this region, so remaining spotted owl habitat is at risk. An adaptive management approach to fire...
This dissertation has two objectives. The first objective is to determine where best to situate the study of mentoring (i.e. the 'making of scientists') on the landscape of the history of science and science studies. This task is accomplished by establishing mentoring studies as a link between the robust body...
John Wesley Powell worked actively for public land system
reform while a director of geographical and geological surveys in
the West from 1869 to 1894. Although this has won him acclaim as a
conservationist, the basis of Powell's linkage of reform with
scientific work is poorly understood.
A study of...
Despite recent efforts to improve site safety, construction still accounts for a disproportionate injury and illness rate. According to the 2007 injury and illness data released by the National Safety Council, the construction industry has a fatality and disabling injury rate that is approximately three times higher than the all-industry...
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John A. Gambatese
Despite recent efforts to improve site safety, construction still
Few remote health monitoring (RHM) studies have included Mexican-origin Latinos, and even fewer have explored RHM acceptance and utility, reasons for RHM uptake success or failure, or how cultural values influence RHM use among this population. The primary purpose of this study was to determine the remote health monitoring (RHM)...
The effects of disking, food plantings, and wheat plantings on a population of California quail (Lophortyx californicus) were studied from fall 1976 to spring 1978 on the E.E. Wilson Wildlife Area, Oregon. Twelve 16.2-ha study sites were established: 3 study sites for each treatment and 3 control sites. Disked areas,...
Sage grouse are a species of concern because their abundance, distribution, and productivity have declined during the past century. Sage grouse productivity has been linked to specific habitat components including particular forbs and native bunchgrasses. Studies on the effects of fire were conducted in Southeastern Oregon in mountain big sagebrush...