Index Catalog // ScholarsArchive@OSU

Modeling Fine-scale Avian Distributions and Densities with Multi-scale Models: Predicting the Past and Present

Creator:: Hallman, Tyler A.
Abstract:: Models of a species’ distribution and models of a species’ spatially explicit density are valuable tools for conservation. They allow researchers to estimate changes in distributions, densities, and populations, based on changing environmental conditions. To trust such estimates, however, the quality of models is exceedingly important. Model performance can be...
Resource Type:: Dissertation
Full Text:: : ______________________________________________________ W. Douglas Robinson Models of a species’ distribution and models of a species

Effects of spatial scale and heterogeneity on avian occupancy dynamics and population trends in forested mountain landscapes

Creator:: Frey, Sarah J. K.
Abstract:: Population trends and patterns in species distributions are the major currencies used to examine responses by biodiversity to changing environments. Effective conservation recommendations require that models of both distribution dynamics and population trends accurately reflect reality. However, identification of the appropriate temporal and spatial scales of animal response, and then...
Resource Type:: Dissertation
Full Text:: , and Douglas Robinson. Their diverse insight has enhanced the quality of my research. The members of

Improving the representation of large landforms in analytical relief shading

Creator:: Marston, Brooke E.
Abstract:: Relief shading is the most common type of cartographic relief representation for print and digital maps. Manual relief shading results in informative and visually pleasing representations of terrain, but it is time consuming and expensive to produce. Current analytical relief shading can be created quickly, but the resulting maps are...
Resource Type:: Masters Thesis
Full Text:: Analytical Relief Shading AN ABSTRACT OF THE THESIS OF Brooke E

Population genetics of ranid frogs : investigating effective population size and gene flow

Creator:: Phillipsen, Ivan C.
Abstract:: This dissertation focuses on the evolutionary forces of genetic drift and gene flow in frog populations. The balance of these two forces and the force of mutation largely determine the amount of neutral genetic variation within populations as well as the degree of genetic similarity among populations. The stochastic evolutionary...
Resource Type:: Dissertation
Full Text:: from the 2006 cohort (n = 401). Toe-clips were stored in Drierite desiccant (W. A. Hammond Drierite

Sensitivity of Forest Structure Estimation to UAS-Based Data Processing Algorithms

Creator:: Maturbongs, Bonifasius Y. L
Abstract:: Forests should be monitored and measured frequently to ensure its sustainability and continuity of carbon sequestration. However, conventional monitoring methods are costly and labor intensive. New technologies, such as unmanned aircraft systems (UAS) can be used as an alternative method to monitor and measure forests. The objective of this study...
Resource Type:: Masters Thesis
Full Text:: Douglas-fir plantation forest near Lincoln City, Oregon, USA. 3D point clouds were produced from the

Spatio-temporal Patterns and Ecological Drivers of Harbor Porpoise (Phocoena phocoena) off the Central Oregon Coast, USA

Creator:: Holdman, Amanda
Abstract:: The marine environment is under increasing pressure from human activities worldwide, particularly in coastal waters, creating a need to better understand fine-scale distributions of highly mobile species that occur in the area, as they are frequently most threatened. Harbor porpoise (Phocoena phocoena) occur frequently in Oregon’s nearshore habitat, but due...
Resource Type:: Masters Thesis
Full Text:: population and distribution (Thompson et al. 2000, Cañadas & Hammond 2006). Marine ecosystems are dynamic

Interactive visualization of diversity in multivariate data sets unified across fields of study

Creator:: Pham, Tuan N. T.
Abstract:: The study of the diversity of multivariate objects shares common characteristics across disciplines, including ecology and organizational management. Nevertheless, experts in these two disciplines have adopted somewhat separate diversity concepts and analysis techniques, limiting the ability of potentially sharing and cross comparing these concerns. Moreover, while complex diversity data may...
Resource Type:: Dissertation
Full Text:: trends in density (trees/ha) of (a) Douglas-fir, and (b) shade- tolerant species in Douglas-fir

Assessing the Role of Snow Cover for Regenerating Forests over Post-wildfire Landscapes in the Pacific Northwest

Creator:: Wilson, Andy C.
Abstract:: Forested, mountain landscapes in the Pacific Northwest (PNW) are changing at an unprecedented rate, largely due to shifts in the regional climate regime. Documented climatic trends across the PNW include increasing wildfire frequency and intensity and an increasingly ephemeral snowpack, especially at moderate elevations. One relationship that has yet to...
Resource Type:: Masters Thesis
Full Text:: controlling variable for growth in northwestern Douglas-fir- dominated forests. The dependency on moisture

A General Framework for Predicting the Geospatial Distribution of Botanical Species

Creator:: Chick, Jesse S.
Abstract:: The local presence or absence of individual botanical species can be predicted with high accuracy by a simple feed-forward neural network, using only local climate data to make inference. This study proposes a framework for learning these predictive models, demonstrates highly accurate predictions for species with a sufficiently large area...
Resource Type:: Honors College Thesis

Forest Succession and Climate Change Effects on Long-Term Runoff Coefficients at Varying Timescales

Creator:: Crampe, Emily A.
Abstract:: Forest harvesting and climate change induced shifts in precipitation characteristics (i.e., intensity, type) may affect how water is partitioned on the landscape, with more water potentially being lost to evaporation or groundwater, and less water being partitioned into the stream. Long-term, paired watershed data allows us to assess these possible...
Resource Type:: Masters Thesis
Full Text:: .......................................................................................... 142 APPENDIX E: Daily Temperature Data Compilation and Description .......................... 145

ScholarsArchive@OSU

Modeling Fine-scale Avian Distributions and Densities with Multi-scale Models: Predicting the Past and Present

Effects of spatial scale and heterogeneity on avian occupancy dynamics and population trends in forested mountain landscapes

Improving the representation of large landforms in analytical relief shading

Population genetics of ranid frogs : investigating effective population size and gene flow

Sensitivity of Forest Structure Estimation to UAS-Based Data Processing Algorithms

Spatio-temporal Patterns and Ecological Drivers of Harbor Porpoise (Phocoena phocoena) off the Central Oregon Coast, USA

Interactive visualization of diversity in multivariate data sets unified across fields of study

Assessing the Role of Snow Cover for Regenerating Forests over Post-wildfire Landscapes in the Pacific Northwest

A General Framework for Predicting the Geospatial Distribution of Botanical Species

Forest Succession and Climate Change Effects on Long-Term Runoff Coefficients at Varying Timescales

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