Index Catalog // ScholarsArchive@OSU

Role of propagule pressure and priority effects on plant establishment during restoration of invaded shrub-steppe

Creator:: Schantz, Merilynn C.
Abstract:: Biological plant invasions are diminishing the ecological integrity and function of ecosystems worldwide. A primary example of this is in the Great Basin of the United States, where invasive annual grasses, like cheatgrass (Bromus tectorum L.) and medusahead (Taeniatherum caput-medusae L. Nevski), are dominating many sagebrush-steppe ecosystems. In these invaded...
Resource Type:: Dissertation
Full Text:: experiments that were evaluated on seeded annual grass invaded sagebrush-steppe ecosystems in eastern Oregon

Persistence of western juniper resource islands following canopy removal

Creator:: Miwa, Christopher
Abstract:: Western juniper (Juniperus occidentalis) cover has more than doubled within the last century and currently occupies over 9 million acres in the Intermountain West. Encroachment has altered the spatial distribution of soil nutrients and plants in these systems, forming nutrient enriched 'resource islands,' under tree canopies. The purpose of this...
Resource Type:: Masters Thesis
Full Text:: grazing allotment in Eastern Oregon where trees had been cut 1, 8 and 15 years ago. In each age class

Effects of plant community characteristics on insect abundance : implications for sage-grouse brood-rearing habitat

Creator:: Ersch, Erica A.
Abstract:: A causative factor in declining greater sage-grouse (Centrocercus urophasianus) populations is reduced annual recruitment due to poor habitat quality. Sage-grouse population decline is concurrent with a decline in the extent and quality of the sagebrush (Artemisia sp.) biome. However, current research has shown a positive relationship between sage-grouse brood and...
Resource Type:: Masters Thesis
Full Text:: ........................................................................................................ 52 Chapter 3: Moth Abundance and Diversity in a Mixed Sagebrush-Steppe Community in Central Oregon

Community analysis of the Wyoming big sagebrush alliance and functional role of Wyoming big sagebrush

Creator:: Davies, Kirk W.
Abstract:: This study consisted of two research projects in the Wyoming big sagebrush (Artemisia tridentata ssp. wyomingensis (Beetle & A. Young) S.L. Welsh) alliance, the most extensive of the big sagebrush complex in the Intermountain West. In the first project, we intensively sampled 107 relatively undisturbed, late seral Wyoming big sagebrush...
Resource Type:: Dissertation
Full Text:: my appreciation to the people who have contributed to this project. Eastern Oregon Agricultural

Seed bank response to juniper expansion in the semi-arid lands of Oregon, USA

Creator:: Duncan, Corinne M.
Abstract:: Expansion of Juniperus occidentalis into the sagebrush steppe has resulted in significant changes in understory composition. A consequence of increased J. occidentalis dominance may be a depletion of the seed bank. The potential for depletion is problematic because a reduction in the amount of species available from the seed bank...
Resource Type:: Masters Thesis
Full Text:: thresholds based on seed density. Two eastern Oregon sagebrush steppe sites where chosen to represent the

Long-term Fuel Succession in the Sagebrush-steppe

Creator:: Reis, Schyler Ainsworth
Abstract:: Historically fire has been the primary disturbance factor in the sagebrush-steppe. The settlement of the West by Euro-Americans, grazing by domestic livestock, and the concomitant spread of invasive species have altered the historical fire regime. Understanding the long-term vegetation structure and fuel succession of the various sagebrush-dominated communities of this...
Resource Type:: Masters Thesis
Full Text:: Succession in Big Sagebrush Steppe with Livestock Grazing. Rangeland Ecology & Management 62, 98–110

Resource Selection and Space Use of Western Long-eared Myotis (Myotis evotis) in a Western Juniper (Juniperus occidentalis) Woodland of Central Oregon

Creator:: Anthony, Christopher R.
Abstract:: Identifying habitat and spatial requirements of wildlife species across multiple spatial scales is a challenging, yet crucial component of wildlife management. Habitat use of bats is particularly difficult to study, and managing habitat to conserve bats is especially challenging because bats are highly vagile organisms that exploit several different types...
Resource Type:: Masters Thesis
Full Text:: Juniper (Juniperus occidentalis) Woodland of Central Oregon. Abstract approved

Associations Between Crested Wheatgrass and Native Vegetation in Southeastern Oregon : An Investigation of Co-establishment, Environment, Seeding History, and Livestock management

Creator:: Nafus, Aleta M.
Abstract:: Crested wheatgrass (Agropyron cristatum [L] Gaertm), an introduced bunchgrass, has been seeded on over 5 million hectares of degraded rangeland in western North America because it establishes more readily than native bunchgrasses. Because crested wheatgrass stands are associated with native species displacement and low biological diversity, there is substantial interest...
Resource Type:: Dissertation
Full Text:: .................................................................................................................. 1 A BRIEF INTRODUCTION OF THE ECOLOGY OF THE SAGEBRUSH STEPPE IN SOUTHEASTERN OREGON

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:: been associated with the degradation of the sagebrush steppe ecosystem in central Oregon. In the

Range Field Day annual report, 1997 : the Sagebrush Steppe : sustainable working environments

Creator:: Oregon State University. Agricultural Experiment Station, Oregon State University. Department of Rangeland Resources, and United States. Agricultural Research Service
Abstract:: Published June 1997. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Resource Type:: Technical Report
Full Text:: Agricultural Research Service For additional copies of this publication, write: Eastern Oregon Agricultural

ScholarsArchive@OSU

Role of propagule pressure and priority effects on plant establishment during restoration of invaded shrub-steppe

Persistence of western juniper resource islands following canopy removal

Effects of plant community characteristics on insect abundance : implications for sage-grouse brood-rearing habitat

Community analysis of the Wyoming big sagebrush alliance and functional role of Wyoming big sagebrush

Seed bank response to juniper expansion in the semi-arid lands of Oregon, USA

Long-term Fuel Succession in the Sagebrush-steppe

Resource Selection and Space Use of Western Long-eared Myotis (Myotis evotis) in a Western Juniper (Juniperus occidentalis) Woodland of Central Oregon

Associations Between Crested Wheatgrass and Native Vegetation in Southeastern Oregon : An Investigation of Co-establishment, Environment, Seeding History, and Livestock management

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

Range Field Day annual report, 1997 : the Sagebrush Steppe : sustainable working environments

Limit your search

Academic Affiliation

Advisor

Commencement Year

Committee Member

Creator

Date

Decade

Degree Field

Degree Level

Degree Name

File Format

Language

License

Non-Academic Affiliation

Peer Reviewed

Resource Type

Rights Statement

Subject

Search Constraints

Search Results

Limit your search