Index Catalog // ScholarsArchive@OSU

Testing the effectiveness of an acoustic deterrent for grey whales along the Oregon Coast

Creator:: Lagerquist, Barbara, Windsor, Martha, and Mate, Bruce
Abstract:: This study was conducted to determine whether a low-powered sound source could be effective at deterring gray whales from areas that may prove harmful to them. With increased interest in the development of marine renewal energy along the Oregon coast the concern that such development may pose a collision or...
Resource Type:: Technical Report
Full Text:: deterrent for gray whales along the Oregon coast Final Scientific Report December 2012

Tree seedling establishment on heterogenous microsites in Douglas-fir forest canopy gaps

Creator:: Gray, Andrew N.
Abstract:: Tree seedling establishment and growth were studied in experimental canopy gaps to determine the effect of structural and environmental heterogeneity on species dynamics within mature and old-growth Douglas-fir forests in the Cascades of central Oregon and southern Washington. Factors examined included forest age, gap size, within-gap position. substrate, year of...
Resource Type:: Dissertation

Error propagation in estimating aboveground biomass using terrestrial LiDAR

Creator:: Shettles, Michael A.
Abstract:: Broad-scale estimates of above ground forest biomass (AGB) are typically produced by applying individual-tree equations to inventory data consisting of measurements from probabilistically or purposively selected trees. The associated uncertainty for these estimates depends primarily on three sources of error that interact and propagate: (1) measurement error, the quality of...
Resource Type:: Masters Thesis
Full Text:: contributions of my committee members Andrew Gray, Professor Thomas Hilker and Professor Lisa Ganio during the

Sexual and Reproductive Health Education in Maunatlala, Botswana

Creator:: Gray, Tyler A.
Abstract:: The purpose of this thesis is the development of a comprehensive sexual and reproductive health (SRH) education program for the junior secondary school in Maunatlala, Botswana. Community based participatory research methods were followed throughout this project to develop a relevant and culturally sensitive program. Data was collected through interviews with...
Resource Type:: Honors College Thesis
Full Text:: , Botswana by Tyler Aitken Gray A THESIS submitted to Oregon

African-American folkloric form and function in segregated one-room schools

Creator:: Gray, Pearl Spears
Abstract:: Maintenance of one's self and one's people in a free society requires educational, cultural, and economic literacy. This is fully as imperative in a democracy as the maintenance of ignorance of slaves is required in an oppressive society. The requisite skills needed both to sustain one's self and become a...
Resource Type:: Dissertation
Full Text:: one-room schools AN ABSTRACT OF THE THESIS OF Pearl Spears Gray for the degree of Doctor of

An evaluation of the invasion potential of Kochia prostrata (forage kochia) in southwestern Idaho, USA

Creator:: Gray, Erin C.
Abstract:: Purposeful introductions of exotic species for rehabilitation efforts following wildfire are common on rangelands in the western U.S., though potential ecological impacts of introduced species in novel environments are often poorly understood. One such introduced species, Kochia prostrata (L.) Schrad (forage kochia) has been seeded on over 200,000 ha throughout...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Erin C. Gray for the degree of

Ecological thresholds, climate extremes, and tree species' distributions across the Pacific coastal United States

Creator:: Lintz, Heather E.
Abstract:: Species' distributions across the landscape are perhaps the least understood yet most conspicuous features of life on earth. Ecologists have long studied species' distributions; yet, many questions remain about why species occur where they do. Such questions persist largely because species' distributions are complex systems with challenging properties like non-linearity,...
Resource Type:: Dissertation
Full Text:: to my committee members, Andrew Gray, Alix Gitelman, Ron Neilson, and Steve Sharrow. My

Understanding changes in forest cover and carbon storage in early successional forests of the Pacific Northwest using USDA Forest Service FIA and multi-temporal Landsat data

Creator:: Schroeder, Todd A.
Abstract:: To effectively study dynamic processes like forest succession over long time periods one must effectively integrate data collected at many different times, locations and spatial scales. The purpose of this research is to integrate forest inventory data collected by the USDA Forest Service’s Forest Inventory and Analysis (FIA) Program with...
Resource Type:: Dissertation
Full Text:: forest regrowth modeling in Chapter 3. Dr. Andrew Gray provided a wealth of knowledge and information

Patterns of tree establishment and vegetation composition in relation to climate and topography of a subalpine meadow landscape, Jefferson Park, Oregon, USA

Creator:: Zald, Harold S. J.
Abstract:: The forest alpine tundra ecotone (FTE, also known as alpine treeline or subalpine parkland), is a conspicuous feature of mountain landscapes throughout the world. Climate change-driven increases in temperature are believed to result in FTE movement and tree invasion of subalpine meadows, which have been documented throughout the Northern Hemisphere...
Resource Type:: Dissertation
Full Text:: members, Andy Gray, Bruce McCune, Michael Wing, and Arthur Sleight. Andy deserves special thanks, in

Effects of Subsampling Trees and Imputation Methods on the Accuracy of Height-to-Crown-Base Predictions for Douglas-fir in Southwest Oregon

Creator:: Allensworth, Elijah J.
Abstract:: Accurate estimates of height-to-crown-base (HTCB) are essential for the reliable projections of stand structure over time required for sustainable forest management. Yet, HTCB often measured alongside total height (HT) for only for a subsample of trees in traditional stand-based inventories and must be imputed for all others. We compared the...
Resource Type:: Masters Thesis
Full Text:: can express here. I’d also like to thank Dr. Andy Gray, Dr. Bogdan Strimbu, Dr. Claudio Fuentes, and

ScholarsArchive@OSU

Testing the effectiveness of an acoustic deterrent for grey whales along the Oregon Coast

Tree seedling establishment on heterogenous microsites in Douglas-fir forest canopy gaps

Error propagation in estimating aboveground biomass using terrestrial LiDAR

Sexual and Reproductive Health Education in Maunatlala, Botswana

African-American folkloric form and function in segregated one-room schools

An evaluation of the invasion potential of Kochia prostrata (forage kochia) in southwestern Idaho, USA

Ecological thresholds, climate extremes, and tree species' distributions across the Pacific coastal United States

Understanding changes in forest cover and carbon storage in early successional forests of the Pacific Northwest using USDA Forest Service FIA and multi-temporal Landsat data

Patterns of tree establishment and vegetation composition in relation to climate and topography of a subalpine meadow landscape, Jefferson Park, Oregon, USA

Effects of Subsampling Trees and Imputation Methods on the Accuracy of Height-to-Crown-Base Predictions for Douglas-fir in Southwest Oregon

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