Index Catalog // ScholarsArchive@OSU

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:: Heather E. Lintz, Bruce McCune, Andrew N. Gray, Katherine A. McCulloh

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

Strategies for sampling and estimation of aboveground tree biomass

Creator:: Poudel, Krishna Prasad
Abstract:: The issue of global climate change and an increasing interest in the reduction of fossil fuel carbon dioxide emissions by using forest biomass for energy production has increased the importance of quantifying forest biomass in recent years. The official U.S. forest carbon reporting is based on the forest biomass estimates...
Resource Type:: Dissertation
Full Text:: Biomass Krishna P. Poudel, Hailemariam Temesgen, and Andrew N. Gray

Mapping disturbance interactions from earth and space : insect effects on tree mortality, fuels, and wildfires across forests of the Pacific Northwest

Creator:: Meigs, Garrett W.
Abstract:: Given the vital role of forest ecosystems in landscape pattern and process, it is important to quantify the effects, feedbacks, and uncertainties associated with forest disturbance dynamics. In western North America, insects and wildfires are both native disturbances that have influenced forests for millennia, and both are projected to increase...
Resource Type:: Dissertation
Full Text:: assisted with writing of Chapter 2. Andrew N. Gray and Matthew J. Gregory assisted with data analysis

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

Sources of information, knowledged base, and knowledge needs of dry season vegetable production as identified by women farmers in Ngabu Agricultural Development Division, Malawi, Central Africa

Creator:: Kayuni, Frieda Lucy
Abstract:: The purpose of this study was to identify the dry season vegetable production sources of information, technical knowledge base and needs of women farmers expressed by the women farmers themselves in Ngabu Agricultural Development Division, Malawi, Central Africa. The objectives were to identify the following aspects of dry season vegetable...
Resource Type:: Masters Thesis
Full Text:: ; The thesis committee members, Drs. Larry A. Burt, Clifford F. Gray, and N. S. Mansour, for their

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

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

Late Pleistocene Slip Rate along the Panamint Valley Fault System, Eastern California

Creator:: Choi, Na Hyung
Abstract:: The Eastern California Shear Zone (ECSZ) is a broad zone of dextral shear inboard of the North American - Pacific plate boundary. Despite decades of study, the significance of a mismatch between geodetic velocities and geologic fault slip rates across the ECSZ remains incompletely understood. Geodetically determined interseismic strain across...
Resource Type:: Masters Thesis
Full Text:: latitude of 36˚-37˚N, geologic slip rates have been constrained along the length of Owens Valley and

Feasibility study on the medical isotopes production with solution target using OSTR: ⁹⁹Mo and related isotopes

Creator:: Baik, Seung-Hyuk
Resource Type:: Dissertation
Full Text:: was developed for use with the Monte Carlo N-Particle Transport Code (MCNP) Redacted for privacy

ScholarsArchive@OSU

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

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

Strategies for sampling and estimation of aboveground tree biomass

Mapping disturbance interactions from earth and space : insect effects on tree mortality, fuels, and wildfires across forests of the Pacific Northwest

Error propagation in estimating aboveground biomass using terrestrial LiDAR

Sources of information, knowledged base, and knowledge needs of dry season vegetable production as identified by women farmers in Ngabu Agricultural Development Division, Malawi, Central Africa

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

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

Late Pleistocene Slip Rate along the Panamint Valley Fault System, Eastern California

Feasibility study on the medical isotopes production with solution target using OSTR: ⁹⁹Mo and related isotopes

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