Index Catalog // ScholarsArchive@OSU

Geocaching: Perceptions of Impacts and Identity

Creator:: Fisher, Dianna M.
Abstract:: Geocaching is an outdoor recreational activity where participants (geocachers) utilize a handheld Global Positioning System (GPS) receiver or smartphone to download coordinates in order to navigate to the location of a hidden container, a geocache. Since its inception in 2000 geocaching has grown exponentially. The potential ecological and recreation management...
Resource Type:: Dissertation
Full Text:: to my committee; to Christine Olsen, Janean Creighton, and (grad representative) Dan Edge, for

A Review and Toxicological Evaluation of an Environmentally-Friendly Alternative to Silver Nanoparticles

Creator:: Nix, Cassandra E.
Abstract:: Within the past two decades, the rise of nanotechnology has provided various technological and industrial sectors with avenues for significant growth and improvements to existing practices. With the inherent qualities which make materials on the nanoscale unique in behavior and function, there are limitless applications of nanotechnology. One of the...
Resource Type:: Masters Thesis

Presence, relative abundance, and resource selection of bats in managed forest landscapes in western Oregon

Creator:: Arnett, Edward B.
Abstract:: I studied presence, relative abundance, and resource selection of bats in managed Douglas-fir (Pseudotsuga menziesii) forests in western Oregon from May through September, 1999–2001. Species richness was not related to elevation, density of snags, or length of edge or perennial streams in sampled landscapes. I captured bats more frequently in...
Resource Type:: Dissertation
Full Text:: also thank Dr. Daniel Edge for filling in for Richard Schmitz and Dr. Lori Cramer for accepting the

Challenges to Gray Wolf Recovery in Washington, Oregon, and Northern California

Creator:: Kriz, Matthew A.
Abstract:: Gray wolves (Canis lupus) are the most socially polarizing species listed under the Endangered Species Act. Wildlife management practices at local, state, and federal levels include lethal control to resolve stakeholder and wolf conflicts as a last resort. There is little experimental evidence that lethal control is effective in this...
Resource Type:: Capstone Project
Full Text:: : Nicole Duplaix Daniel W. Edge Joe Kerkvliet Gray wolves (Canis lupus) are the most socially

Estimation of Population Age Structure, Detection Probability, and Density of Red Tree Voles in Oregon

Creator:: Marks-Fife, Chad A.
Abstract:: Red tree voles (Arborimus longicaudus) are a unique species of Arvicoline rodent found in western Oregon and northwest California. Their preferred habitat is mature and old-growth coniferous forest dominated by Douglas-fir (Pseudotsuga menziesii). Tree voles are an important prey item for northern spotted owls and many other predators, but are...
Resource Type:: Masters Thesis
Full Text:: which I can never adequately thank him. I want to thank my committee members, Dan Edge and Bob Mason

Modeling Density Dependence in the Presence of Measurement Error

Creator:: Payton, Quinn
Abstract:: Density dependence is an ecological concept concerning the mechanisms of change in the size of a population. The inability to census ecological populations confounds approaches to identify and quantify the level of density dependence. Statistical tests which ignore the presence of measurement error tend to result in misspeci fied type...
Resource Type:: Dissertation

Forest vegetation and fuel dynamics following stand-replacing wildfire, re-burn, and postfire management in the Siskiyou Mountains, Oregon

Creator:: Donato, Daniel C.
Abstract:: Following high-severity fire, forest succession may take alternate pathways depending on the pattern of the fire and any secondary disturbances during early stand development, with lasting consequences for ecosystem function. The objectives of this research were to quantify: (1) early postfire regeneration as influenced by the spatial pattern of a...
Resource Type:: Dissertation
Full Text:: ABSTRACT OF THE DISSERTATION OF Daniel C. Donato for the degree of Doctor of Philosophy in Forest

Comparative wintering ecology of two subspecies of sandhill crane : informing conservation planning in the Sacramento-San Joaquin River Delta region of California

Creator:: Ivey, Gary L.
Abstract:: California's Central Valley agricultural landscapes provide several important wintering regions for Pacific Flyway sandhill crane (Grus canadensis) populations; however, the value of those regions is being compromised by urban expansion, other developments, and conversions to incompatible crop types. Greater (G. c. tabida) and lesser sandhill cranes (G. c. canadensis) both...
Resource Type:: Dissertation
Full Text:: . Dan Edge, and Dr. Christopher Mundt who agreed to serve on my committee for my defense. My study

Effectiveness of protected area management in Thailand

Creator:: Maneesai, Ronasit
Abstract:: The main objectives of this study are to identify the nature of threats to protected areas and assess the effectiveness of protected area systems and management in Thailand, and to evaluate the use of conservation biology concepts in protected area management. The results from a survey of the heads of...
Resource Type:: Dissertation

Information Criterion for Nonparametric Model-Assisted Survey Estimators

Creator:: James, Addison
Abstract:: Nonparametric model-assisted estimators have been proposed to improve estimates of finite population parameters. More efficient estimators are obtained when the parametric model is misspecified due to the flexibility of nonparametric models. In this dissertation, we derive information criteria to select appropriate auxiliary variables to use in an additive model-assisted method....
Resource Type:: Dissertation
Full Text:: , and flexibility in scheduling meetings. I would also like to thank Dr. Daniel Edge for serving as the

ScholarsArchive@OSU

Geocaching: Perceptions of Impacts and Identity

A Review and Toxicological Evaluation of an Environmentally-Friendly Alternative to Silver Nanoparticles

Presence, relative abundance, and resource selection of bats in managed forest landscapes in western Oregon

Challenges to Gray Wolf Recovery in Washington, Oregon, and Northern California

Estimation of Population Age Structure, Detection Probability, and Density of Red Tree Voles in Oregon

Modeling Density Dependence in the Presence of Measurement Error

Forest vegetation and fuel dynamics following stand-replacing wildfire, re-burn, and postfire management in the Siskiyou Mountains, Oregon

Comparative wintering ecology of two subspecies of sandhill crane : informing conservation planning in the Sacramento-San Joaquin River Delta region of California

Effectiveness of protected area management in Thailand

Information Criterion for Nonparametric Model-Assisted Survey Estimators

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