Index Catalog // ScholarsArchive@OSU

Experimental analysis of competition between desert rodents in Oregon

Creator:: Schoffelen, Emile
Resource Type:: Masters Thesis
Full Text:: Rodents in Oregon AN ABSTRACT OF THE THESIS OF Emile Schoffelen in Zoology for the degree of Master

Indirect effects of ultraviolet-B radiation on larval amphibians as mediated by food quality and trophic interactions

Creator:: Scheessele, Erin A.
Abstract:: Ultraviolet-B radiation (UVB) is an abiotic stressor in both terrestrial and aquatic systems. The stratospheric ozone layer, depleted due to anthropogenic activities and the cause of elevated UVB at earth's surface over the last four decades, is predicted to recover by 2065. However, UVB levels in aquatic systems may continue...
Resource Type:: Dissertation
Full Text:: submitted to Oregon State University in partial fulfillment of the requirements for

Multiple stressors and amphibian population declines

Creator:: Hatch, Audrey C.
Abstract:: In the past decade, declines in amphibian populations have captured scientific and popular interest. The causes of the declines are likely to be complex and involve interactions between several environmental stressors. Using multifactorial experiments, I investigated the combined effects of several anthropogenic stressors on developing amphibians in Oregon, USA. In...
Resource Type:: Dissertation
Full Text:: fertilizer on two species of amphibians at both low and high elevation sites in Oregon. InHyla Redacted for

Effects of pesticides on amphibians with special reference to the pyrethroidinsecticide, cypermethrin

Creator:: Biga, Lindsay M.
Abstract:: Pollution by pesticides is a ubiquitous concern for wildlife. The effects of pesticides are especially concerning in aquatic environments, which are particularly vulnerable as they have several exposure routes for the influx of chemicals. These effects are of particular concern as biodiversity loss reaches unprecedented rates. This includes recent declines...
Resource Type:: Dissertation
Full Text:: . Biga for the degree of Doctor of Philosophy in Environmental Science presented on November 5, 2013

Emerging infectious disease in lentic environments : the ecology and biogeography of the amphibian chytrid fungus Batrachochytrium dendrobatidis, with perspectives on water quality, limnology, and chemical contaminants

Creator:: Chestnut, Tara
Abstract:: Biodiversity losses in terrestrial, freshwater, and marine systems are accelerating at a global scale and the most threatened vertebrate taxa are those associated with freshwater habitats. The causes of biodiversity losses are often complex and include synergistic effects of natural and human-induced stressors, such as habitat loss and fragmentation, urbanization,...
Resource Type:: Dissertation
Full Text:: , Oregon, USA, sampled quarterly for 12 months

Ecological aspects of kin discriminating behavior with implications of functional value

Creator:: Hokit, D. Grant
Abstract:: To assess the context dependence of kin discriminating behavior, I examined kin-biased aggregation behavior in tadpoles of R. cascadae in different ecological conditions. I manipulated food distribution, predator presence, thermal heterogeneity, and relatedness in a multifactorial mesocosm experiment. All four factors interacted to influence tadpole dispersion. My results suggest that...
Resource Type:: Dissertation
Full Text:: km west of Bend, Oregon, U.S.A.; 3 km north of Todd Lake in the Deschutes National Forest. Two

The effects of pathogens, UV-B radiation, and introduced species on amphibians in the Pacific Northwest

Creator:: Kiesecker, Joseph Michael
Abstract:: I examined two amphibian communities to assess factors that may impact amphibian biodiversity. The results suggest that the potential factors which influence the maintenance of amphibian biodiversity are multi-faceted and thus, attempts to understand these factors must reflect these complexities. I investigated factors that influenced the susceptibility of western toad...
Resource Type:: Dissertation
Full Text:: species on amphibians in the Pacific Northwest AN ABSTRACT OF THE THESIS OF Joseph M. Kiesecker for

Host parasite relationships between deer mice (Peromyscus maniculatus) and their eimerian parasites (protozoa)

Creator:: Fuller, Claire A.
Resource Type:: Dissertation
Full Text:: animals were conducted in MacDonald Forest, Oregon State University's experimental forest (approx. 15

The Effects of Nitrate and a Pathogenic Fungus, Batrachochytrium dendrobatidis, on Amphibians

Creator:: Negru, Delia
Abstract:: The current rate of global biodiversity loss and extinctions is unparalleled and a major concern. Freshwater organisms are facing particularly rapid rates of biodiversity loss. Amphibians, which require an aquatic environment for part of their life cycle, are one of the most vulnerable vertebrate groups. Amphibians are experiencing population declines,...
Resource Type:: Masters Thesis
Full Text:: Sciences Graduate Fund, the Oregon Lottery Graduate Scholarship, the US Forest Service Pacific Northwest

Host-pathogen dynamics in a changing environment : susceptibility of amphibians to an emerging infectious disease

Creator:: Searle, Catherine L.
Abstract:: Infectious diseases are a growing concern for both humans and wildlife. The negative effects of infectious disease have been exemplified by the recent global amphibian population declines associated with disease outbreaks. Although multiple pathogens and factors play a role in these declines, the aquatic fungal pathogen, Batrachochytrium dendrobatidis (Bd), has...
Resource Type:: Dissertation
Full Text:: simply being my best friend. This research was funded by an Oregon Zoo Foundation Future for Wildlife

ScholarsArchive@OSU

Experimental analysis of competition between desert rodents in Oregon

Indirect effects of ultraviolet-B radiation on larval amphibians as mediated by food quality and trophic interactions

Multiple stressors and amphibian population declines

Effects of pesticides on amphibians with special reference to the pyrethroidinsecticide, cypermethrin

Emerging infectious disease in lentic environments : the ecology and biogeography of the amphibian chytrid fungus Batrachochytrium dendrobatidis, with perspectives on water quality, limnology, and chemical contaminants

Ecological aspects of kin discriminating behavior with implications of functional value

The effects of pathogens, UV-B radiation, and introduced species on amphibians in the Pacific Northwest

Host parasite relationships between deer mice (Peromyscus maniculatus) and their eimerian parasites (protozoa)

The Effects of Nitrate and a Pathogenic Fungus, Batrachochytrium dendrobatidis, on Amphibians

Host-pathogen dynamics in a changing environment : susceptibility of amphibians to an emerging infectious disease

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