Index Catalog // ScholarsArchive@OSU

A landscape-scale assessment of plant communities, hydrologic processes, and state-and-transition theory in a Western juniper dominated ecosystem

Creator:: Petersen, Steven Lawrence
Abstract:: Western juniper has rapidly expanded into sagebrush steppe communities in the Intermountain West during the past 120 years. This expansion has occurred across a wide range of soil types and topographic positions. These plant communities, however, are typically treated in current peer-reviewed literature generically. The focus of this research is...
Resource Type:: Dissertation
Full Text:: Western Juniper Dominated Ecosystem by Steven L. Petersen A DISSERTATION submitted to Oregon State

Watershed response to western juniper control

Creator:: Deboodt, Timothy L.
Abstract:: Western juniper (Juniperus occidentalis) encroachment has been associated with increased soil loss and reduced infiltration resulting in the loss of native herbaceous plant communities and the bird and animal species that rely on them. Hydrologically, however, change in water yield has been linked with the amount of annual precipitation a...
Resource Type:: Dissertation
Full Text:: Ecology and Management presented on May 8, 2008. Title: Watershed Response to Western Juniper

Interception and water holding capacity of western juniper

Creator:: Larsen, Royce E.
Resource Type:: Dissertation

Quantification of state-and-transition model components utilizing long-term ecological response data following one-seed juniper treatment on a deep sand savannah ecological site

Creator:: Shaver, Patrick L.
Abstract:: A proposed state-and-transition model (STM) for the Deep Sand Savannah ecological site in central New Mexico was developed using historical data and expert knowledge. This STM was tested utilizing data from short and long term one-seed juniper (Juniperus monosperma (Engelm.) Sarg.) control experiments initiated in 1981 and 1985. Utilizing data...
Resource Type:: Dissertation
Full Text:: -Regression Model………………………… 1 Non-Equilibrium Model…………………………………. 2 JUNIPER ECOLOGY……………………………………………. 7

Analysis of hydrology and erosion in small, paired watersheds in a juniper-sagebrush area of central Oregon

Creator:: Fisher, Michael, (Michael Patrick), 1966-
Abstract:: Current research indicates that the expansion of western juniper can inhibit soil water retention, storage and prolonged releases from watersheds. This phenomenon is of great importance in eastern Oregon, as western juniper is encroaching into sagebrush/grass communities with a correlated reduction in herbaceous ground cover, resulting in reduced infiltration rates...
Resource Type:: Dissertation
Full Text:: of Hydrology and Erosion in Small, Paired Watersheds in a juniper-sagebrush Area of Central Oregon

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:: Mountain, Oregon. Cutting of western juniper reduced below-ground competition for water and N

The ecological consequences of the reduction of species diversity : experimental approaches

Creator:: Allison, Gary William
Abstract:: The influence of loss of diversity on community dynamics and ecosystem functioning has recently received considerable attention. Although study of biodiversity has a long history within ecology, empirical investigations exploring consequences of loss have been rare. Because many factors confound diversity comparisons, experimental manipulations of diversity offer the most direct...
Resource Type:: Dissertation
Full Text:: ecology, empirical investigations exploring consequences of loss have been rare. Because many factors

Livestock, deer and logging interactions in the lodgepole pine/pumice region of central Oregon

Creator:: Stuth, Jerry W.
Abstract:: The objectives of this study were to: 1) determine production of plant species and utilization by cattle, sheep and deer as related to plant communities and timber management practices and 2) evaluate the interaction of range use between cattle and deer and between sheep and deer as affected by site...
Resource Type:: Dissertation
Full Text:: pine-pumice region of central Oregon AN ABSTRACT OF THE THESIS OF Jerry Wayne Stuth for the degree

Abundance and community composition of arboreal spiders : the relative importance of habitat structure, prey availability and competition

Creator:: Halaj, Juraj
Abstract:: This work examined the importance of structural complexity of habitat, availability of prey, and competition with ants as factors influencing the abundance and community composition of arboreal spiders in western Oregon. In 1993, I compared the spider communities of several host-tree species which have different branch structure. I also assessed...
Resource Type:: Dissertation
Full Text:: western Oregon. In 1993, I compared the spider communities of several host-tree species which have

Comparative study of the population dynamics, secondary productivity, and reproductive ecology of the euphausiids Euphausia pacifica and Thysanoessa spinifera in the Oregon upwelling region

Creator:: Gutierrez, Jaime Gomez
Abstract:: I compare the seasonal abundance variation, population dynamics, fecundity, egg hatching mechanism and success, and apostome ciliate parasites of the euphausiids Euphausia pac?fica and Thysanoessa spinfera from the Oregon coast, USA. Community structure and nearshore distributions were examined from bi-weekly oceanographic surveys (1970-1972). This region has a strong cross-shelf change...
Resource Type:: Dissertation
Full Text:: : Comparative Study of the Population Dynamics, Secondary Productivity, and Reproductive Ecology of the

ScholarsArchive@OSU

A landscape-scale assessment of plant communities, hydrologic processes, and state-and-transition theory in a Western juniper dominated ecosystem

Watershed response to western juniper control

Interception and water holding capacity of western juniper

Quantification of state-and-transition model components utilizing long-term ecological response data following one-seed juniper treatment on a deep sand savannah ecological site

Analysis of hydrology and erosion in small, paired watersheds in a juniper-sagebrush area of central Oregon

Understory vegetation response and nitrogen cycling following cutting of western juniper

The ecological consequences of the reduction of species diversity : experimental approaches

Livestock, deer and logging interactions in the lodgepole pine/pumice region of central Oregon

Abundance and community composition of arboreal spiders : the relative importance of habitat structure, prey availability and competition

Comparative study of the population dynamics, secondary productivity, and reproductive ecology of the euphausiids Euphausia pacifica and Thysanoessa spinifera in the Oregon upwelling region

Limit your search

Academic Affiliation

Advisor

Commencement Year

Committee Member

Creator

Date

Decade

Degree Field

Degree Level

Degree Name

File Format

Language

License

Location

Non-Academic Affiliation

Peer Reviewed

Resource Type

Rights Statement

Subject

Search Constraints

Search Results

Limit your search