Index Catalog // ScholarsArchive@OSU

Forage production, dual use potential, and trait variation in chicory grown in the Pacific Northwest

Creator:: Seeno, Elizabeth
Abstract:: Grasslands in the Pacific Northwest are characterized by seasonally wet, acidic soils that mainly support cool season grasses and a limited number of legume species. A major limitation to efficient animal production in grass-dominant pastures is the decline in the herbage growth rate and nutritional quality of forage from late...
Resource Type:: Dissertation
Full Text:: Seeno for the degree of Doctor of Philosophy in Rangeland Ecology and Management presented on April 24

Plant Species Diversity and Pasture Productivity of a High-input Dairy Pastureland System and a Low-input Sheep Pastureland System in Western Oregon, USA

Creator:: Anderson, Jordan D.
Abstract:: The sustainable use of natural resources, including the goods and services provided by pasturelands and rangelands, is of growing importance due to climatic uncertainty and population growth. Maintaining high productivity in livestock operations is necessary as land availability diminishes and global populations rise. The potential negative impacts to the environment...
Resource Type:: Masters Thesis
Full Text:: . Anderson for the degree of Master of Science in Rangeland Ecology and Management presented on May 31

Assessing Sagebrush-obligate Songbird Abundance: Considerations of Landscape-level Threats and Umbrella Species Efficacy

Creator:: Harrington, Alan H.
Abstract:: The umbrella species concept is a single-species conservation strategy built on the notion that indirect protections are provided for multiple species that occupy the same area as a single, or umbrella, species. The utility of the umbrella species concept relies on similar associations of abundance, distribution, life history requirements, and...
Resource Type:: Masters Thesis
Full Text:: . Harrington for the degree of Master of Science in Rangeland Ecology and Management presented on March 15

Mycorrhizal Fungi on the Sagebrush Steppe: Benefits for Restoring Keystone Rangeland Plant Species

Creator:: Prado-Tarango, David E.
Abstract:: Arbuscular mycorrhizal fungi (AMF) are plant symbionts that associate with the vast majority of terrestrial plants species. The AMF colonizes the plant roots by penetrating the root cortical cells, where the fungi exchanges mineral nutrients with the host plant for photosynthates. This association exists as a complex system in which...
Resource Type:: Dissertation
Full Text:: David Eduardo Prado-Tarango for the degree of Doctor of Philosophy in Rangeland Ecology and Management

Comparison of Common Ravens in Sage-grouse Core and Non-Core Areas: Assessing Predator Densities Related to Anthropogenic Features

Creator:: Revekant, Claire L.
Abstract:: Greater sage-grouse (Centrocercus urophasianus: hereafter sage-grouse) abundance and distribution in North America has declined over the last century. Many factors have contributed to this decline, including habitat loss and fragmentation from human development with an associated potential for increased predation. While human development has been connected to lower sage-grouse demographic...
Resource Type:: Masters Thesis
Full Text:: for the degree of Master of Science in Rangeland Ecology and Management presented on June 15, 2021

Vegetation as Impacted by Soil Characteristics and Moisture in a Conservation Wetland, Willamette Valley, OR

Creator:: Aslan, Fevziye
Abstract:: Wetland degradation has negative influences on wetland functions and services. The understanding of wetland functions requires the intersection of two science disciplines, ecohydrology and plant physiology for a correct approach on wetland restoration and management. Although studies assessing ecohydrological relationships to protect wetlands are relatively common, studies evaluating both ecohydrological...
Resource Type:: Masters Thesis
Full Text:: for the degree of Master of Science in Rangeland Ecology and Management presented on June 12, 2020

Forb Community Response to Various Disturbances in the Pacific Northwest Bunchgrass Prairie

Creator:: Watson, Brogan L.
Abstract:: Observed declines in native pollinator species worldwide has generated concern and focused research into the disturbances, past and present, which may have contributed to these losses. In grasslands, for example, habitat degradation and fragmentation from historical and current crop production and livestock grazing has left only a few remnants of...
Resource Type:: Masters Thesis
Full Text:: degree of Master of Science in Rangeland Ecology and Management presented on June 4, 2020. Title

The Ecological Recovery of Saguaro National Park after Removal of Cattle Grazing and Associated Succession

Creator:: Summers, Ryan J.
Abstract:: In the area that is now Saguaro National Park East, grazing began in the 1880's. Because of the impact to the iconic saguaro cactus as well as all palatable plant species in the area, ecological damage in the park were determined to be so great that anti-grazing conservationists challenged the...
Resource Type:: Masters Thesis
Full Text:: for the degree of Master of Science in Rangeland Ecology & Management presented on May 6, 2020

Ecosystem Processes in Treated and Untreated Western Juniper Systems in Semiarid Watersheds: A Paired Watershed Study in Central Oregon

Creator:: Abdallah, Mohamed AB.
Abstract:: Western juniper (Juniperus occidentalis) encroachment has been associated with negative ecological and hydrological consequences including reductions in herbaceous production and diversity, deterioration for wildlife habitat, and higher erosion and runoff potentials. As a result, western juniper removal is a common and accepted rangeland management practice. Although studies evaluating the ecological...
Resource Type:: Dissertation
Full Text:: : __________________________________________________________ Major Professor, representing Rangeland Ecology and Management

The Response of Ventenata dubia to Prescribed Fire and Ungulate Grazing on the Pacific Northwest Bunchgrass Prairie

Creator:: Ridder, Luke W.
Abstract:: Ventenata dubia L. (ventenata) is an introduced, winter annual grass that has recently been raising concerns across the Pacific Northwest Bunchgrass Prairie and the Palouse Prairie. It is well established now in pasturelands, croplands, and a variety of ecosystems including grasslands, sagebrush steppe, ponderosa pine forests and woodlands. Ventenata is...
Resource Type:: Masters Thesis
Full Text:: degree of Master of Science in Rangeland Ecology and Management Presented on June 7, 2019. Title: The

ScholarsArchive@OSU

Forage production, dual use potential, and trait variation in chicory grown in the Pacific Northwest

Plant Species Diversity and Pasture Productivity of a High-input Dairy Pastureland System and a Low-input Sheep Pastureland System in Western Oregon, USA

Assessing Sagebrush-obligate Songbird Abundance: Considerations of Landscape-level Threats and Umbrella Species Efficacy

Mycorrhizal Fungi on the Sagebrush Steppe: Benefits for Restoring Keystone Rangeland Plant Species

Comparison of Common Ravens in Sage-grouse Core and Non-Core Areas: Assessing Predator Densities Related to Anthropogenic Features

Vegetation as Impacted by Soil Characteristics and Moisture in a Conservation Wetland, Willamette Valley, OR

Forb Community Response to Various Disturbances in the Pacific Northwest Bunchgrass Prairie

The Ecological Recovery of Saguaro National Park after Removal of Cattle Grazing and Associated Succession

Ecosystem Processes in Treated and Untreated Western Juniper Systems in Semiarid Watersheds: A Paired Watershed Study in Central Oregon

The Response of Ventenata dubia to Prescribed Fire and Ungulate Grazing on the Pacific Northwest Bunchgrass Prairie

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