Index Catalog // ScholarsArchive@OSU

Greater sage-grouse reproductive ecology : linkages among habitat resources, maternal nutrition, and chick survival

Creator:: Gregg, Michael A.
Abstract:: Greater sage-grouse (Centrocercus urophasianus) populations declined range wide during the past 50 years. Grouse populations were 2-3 times larger than the current population as recently as the early 1970's. In addition to habitat loss and fragmentation, declines were attributed habitat degradation that caused reduced productivity. Because chick survival remains the...
Resource Type:: Dissertation
Full Text:: gratitude that I have for my major professor and good friend, Dr. John Crawford, whom I have worked with

The effects of forest fuel reduction on fire severity and long-term carbon storage

Creator:: Mitchell, Stephen Richard
Abstract:: Two forest management objectives being debated in the context of federally managed landscapes in the US Pacific Northwest involve a perceived trade-off between fire restoration and C sequestration. The former strategy would reduce fuel (and therefore C) that has accumulated through a century of fire suppression and exclusion that has...
Resource Type:: Dissertation
Full Text:: Secretariat, Geneva, Switzerland. Noss RF, Franklin JF, Baker WL, Schoennagel T, Moyle PB (2006) Managing

Nutritional value of several Opuntia species

Creator:: Ben-Thlija, Abdellaziz
Abstract:: Little is known about cactus nutrients, their proportions in different species and the variability of these proportions with season. In the scant literature available on Opuntia species, no systematic survey has been published to document and compare the nutritional qualities of different species. Also, no studies have been done to...
Resource Type:: Masters Thesis
Full Text:: assess the seasonal variability in one of them: Opuntia fragilis (from John Day Fossil Beds, Central

Disturbance and dynamics of riparian forests in southwestern Oregon

Creator:: Messier, Michael S.
Abstract:: Fire exclusion has been associated with structural and compositional changes in many upland forests of the western United States, but little is known about the impacts on riparian forests, portions of the landscape protected for habitat and water quality. For this study, I characterized the historic disturbance and tree recruitment...
Resource Type:: Masters Thesis
Full Text:: , Eve Gasarch, Haley Smith, John Cymore, Schéhérazade Aoubid, Loup Rimbaud, Zane Haxton, Michele Noble

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
Full Text:: conifer overstory analysis ideas and conifer basal area calculations. John Bailey provided

Spatial and age class analysis of managed western juniper (Juniperus occidentalis) woodlands in central Oregon

Creator:: Zophy, Kelley T.
Abstract:: Juniper is a native species to Oregon and confers ecological benefits to wildlife when it is at savannah and transitional densities. Its range and extent have fluctuated with climatic change, but the current range expansion is unprecedented in its extent. The range expansion has been associated with the degradation of...
Resource Type:: Masters Thesis
Full Text:: advice throughout the development of this research. The author also extends her gratitude to John

Fire effects on vegetation diversity, structure, and successional dynamics in shrub-steppe and mixed conifer environments of the Hells Canyon, Idaho

Creator:: Havlina, Douglas William
Abstract:: The effects of fire severity on post-fire succession and shrub demography were quantified in shrub-steppe grasslands and subalpine forests in the Hells Canyon of the Payette National Forest, Idaho. Following the 1988 Eagle Bar Fire, species frequency, community diversity, fire adaptations, and stand ages were quantified at 12 plots in...
Resource Type:: Masters Thesis
Full Text:: Jeffries, and John Baglien of the Payette National Forest for financial, logistical, and moral support

Spatial patterns of fuel management activities and their effects on wildfire behavior

Creator:: Kim, Young-Hwan
Abstract:: Fuel management has been used as an effective local strategy to reduce the undesirable consequences of wildfires. Many efforts toward scheduling of fuel management activities across a broader landscape have been proposed, with the hope of achieving larger landscape-scale management effects. However, scheduling of fuel management treatments across the broader...
Resource Type:: Dissertation
Full Text:: :167-174. Forman, R.T.T. and Godron, M. 1986. Landscape Ecology. John Wiley & Sons, Inc., New

Fire severity and vegetation response to fire in riparian areas of the Biscuit and B&B Complex Fires, Oregon

Creator:: Halofsky, Jessica E.
Abstract:: Fire is the dominant disturbance process in western U.S. forests, and although effects of fire in upland forests are relatively well-studied, there is little information about fire effects on riparian forests, critical areas of the landscape for both habitat and water quality. This dissertation examines different aspects of fire effects...
Resource Type:: Dissertation

Understory vegetation response and nitrogen cycling following cutting of western juniper

Creator:: Bates, Jonathan D.
Abstract:: Since the late 1880's western juniper has expanded in range and increased in density in sagebrush-bunchgrass, riparian, and forested plant communities of the Pacific Northwest. Succession to western juniper woodland has been shown to reduce the productivity and diversity of the understory component, result in concentration of soil nutrients beneath...
Resource Type:: Dissertation
Full Text:: ponderosa pine (Pines ponderosa) zone (Sowder and Mowatt, 1958; Franklin and Dryness, 1973). In

ScholarsArchive@OSU

Greater sage-grouse reproductive ecology : linkages among habitat resources, maternal nutrition, and chick survival

The effects of forest fuel reduction on fire severity and long-term carbon storage

Nutritional value of several Opuntia species

Disturbance and dynamics of riparian forests in southwestern Oregon

Quaking aspen persistence in three Oregon landscapes

Spatial and age class analysis of managed western juniper (Juniperus occidentalis) woodlands in central Oregon

Fire effects on vegetation diversity, structure, and successional dynamics in shrub-steppe and mixed conifer environments of the Hells Canyon, Idaho

Spatial patterns of fuel management activities and their effects on wildfire behavior

Fire severity and vegetation response to fire in riparian areas of the Biscuit and B&B Complex Fires, Oregon

Understory vegetation response and nitrogen cycling following cutting of western juniper

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