Index Catalog // ScholarsArchive@OSU

The Role of Emerging Pathogens in Amphibian Population Declines : Experimental Evidence

Creator:: Hambalek, Natalie M.
Abstract:: Rapid rates of biodiversity loss have supported the notion that Earth is experiencing a sixth major extinction event. The causes of worldwide biodiversity loss are multifaceted and context dependent. One of the most prominent groups experiencing population declines and extinctions are amphibians. Several pathogens and their associated diseases are especially...
Resource Type:: Masters Thesis
Full Text:: : Experimental Evidence Abstract approved: _____________________________________________________ Andrew R

Evolutionary Genomic Responses to Mitochondrial Dysfunction in Caenorhabditis elegans

Creator:: Wernick, Riana I.
Abstract:: Understanding the impact of mitochondrial dysfunction on genome evolution has the potential not only to provide new insights on the basic evolutionary processes influencing mitochondrial and nuclear genomes, but may also reveal novel avenues for evolutionary adaptive recovery from harmful mutations. Aberrant mitochondrial activity is fundamental to the pathology of...
Resource Type:: Dissertation
Full Text:: elegans Abstract approved: ______________________________________________________ Dee R. Denver

Vertebrates, arthropods, and invasive plants : an investigation of the top-down and bottom-up interactions of multiple herbivore guilds in a grassland system

Creator:: Farrell, Kelly Anne
Abstract:: Humans are increasing the scale and frequency of many natural disturbances, as well as adding novel disturbances to ecosystems. This thesis uses the arthropod community as a metric to examine the multi-trophic responses to disturbances in California grasslands. Chapter 2 explores how the long-term exclusion of native vertebrate herbivores has...
Resource Type:: Masters Thesis
Full Text:: . Borer David R. Maddison Humans are increasing the scale and frequency of many natural

Dogs, Death, and Dietary Breadth: Insights into the Macroecology and Macroevolution of Canidae

Creator:: Tanis, Brian P.
Abstract:: The size, shape, and stability of a species’ dietary niche can both influence and reflect a variety of biological patterns, including species interactions, extinction risk, and ecosystem function. This is particularly apparent when dietary changes manifest at ecosystem and clade scales to profoundly affect macroecological and macroevolutionary trajectories. However, many...
Resource Type:: Dissertation
Full Text:: Sullivan-Stack, Katie Dziedzic, Danielle Tom, Syl Wyatt, Ian Morelan, Amy Jaron, Elise Heffernan, and

Direct effects and tradeoffs affect vegetative growth and sexual reproduction in an invasive seagrass experiencing different disturbance regimes

Creator:: Henderson, Jeremy Scott
Abstract:: Disturbance has both direct and indirect ramifications that can influence species abundance, distribution, and ultimately the diversity found within a community. As a result, we might expect disturbance to play a particularly important role in the ability of non-native species to proliferate outside of their native range. In practice, disturbance...
Resource Type:: Masters Thesis
Full Text:: 134 undergraduate research assistants. Thank you Danielle Asson, Kayla Johnston, and 135 Hailey

Habitat Use and Ecological Interactions of Invasive Lionfish in the Bahamas

Creator:: Davis, Alexandra C. D.
Abstract:: Invasive species are a growing global economic and ecological problem. Invasive Indo-Pacific lionfish (Pterois spp.) are known to have extreme negative effects on coral-reef communities in the Bahamas, so understating their distribution within and among reefs, what limits their local movements, and the effects they have on native prey species...
Resource Type:: Dissertation
Full Text:: Christina Danielle Davis for the degree of Doctor of Philosophy in Zoology presented on December 4, 2018

Songbird feathers as indicators of mercury exposure : Patterns across feather tracts and correlations to other tissues

Creator:: Low, Katherine E.
Abstract:: Monitoring mercury (Hg) exposure in avian populations is critical to understanding the effects of this neurotoxin. Avian Hg exposure is commonly evaluated by measuring Hg concentrations in internal tissues, blood, and feathers. Feathers are a popular sampling matrix due to ease of sampling and limited stress to birds. However, it...
Resource Type:: Honors College Thesis
Full Text:: enthusiasm for this project. I would also like to thank Danielle Ramsden, for spending hours upon hours

The comparative histochemistry of the decapod antennal gland--esterases, phosphatases and glycogen

Creator:: Fuller, Eugene G.
Abstract:: The distributions of alkaline phosphatase, acid phosphatase, non-specific esterases, and glycogen were described for the antennal glands of the freshwater crayfish, Pacifastacus, and the marine crabs Cancer and Pugettia. Alkaline phosphatase is confined primarily to the luminal edge of the labyrinth in all of the above forms whereas acid phosphatase...
Resource Type:: Dissertation
Full Text:: patterns but band r of the smaller animals was occasionally reduced or absent. Cancer Only adult male

Investigating variation in immunity and infection risk in wild ungulates

Creator:: Dugovich, Brian S.
Abstract:: In the midst of the sixth mass extinction, understanding wildlife disease spillover is critical to maintaining protected wildlife areas. Studying ecoimmunology and wildlife disease ecology helps to understand immune and disease traits in an ecological context, which is invaluable in preventing pathogen spillover between livestock and wildlife. To investigate this...
Resource Type:: Dissertation
Full Text:: Spaan, and Danielle Sisson. Many thanks go to the Department of Integrative Biology at Oregon State

The influence of biophysical feedbacks and species interactions on grass invasions and coastal dune morphology in the Pacific Northwest, USA

Creator:: Zarnetske, Phoebe Lehmann
Abstract:: Biological invasions provide a unique opportunity to study the mechanisms that regulate community composition and ecosystem function. Invasive species that are also ecosystem engineers can substantially alter physical features in an environment, and this can lead to cascading effects on the biological community. Aquatic-terrestrial interface ecosystems are excellent systems to...
Resource Type:: Dissertation
Full Text:: Zarnetske (NSF award 0333257) at Oregon State University (OSU), Oregon Sea Grant R/ECO-19 to Sally Hacker

ScholarsArchive@OSU

The Role of Emerging Pathogens in Amphibian Population Declines : Experimental Evidence

Evolutionary Genomic Responses to Mitochondrial Dysfunction in Caenorhabditis elegans

Vertebrates, arthropods, and invasive plants : an investigation of the top-down and bottom-up interactions of multiple herbivore guilds in a grassland system

Dogs, Death, and Dietary Breadth: Insights into the Macroecology and Macroevolution of Canidae

Direct effects and tradeoffs affect vegetative growth and sexual reproduction in an invasive seagrass experiencing different disturbance regimes

Habitat Use and Ecological Interactions of Invasive Lionfish in the Bahamas

Songbird feathers as indicators of mercury exposure : Patterns across feather tracts and correlations to other tissues

The comparative histochemistry of the decapod antennal gland--esterases, phosphatases and glycogen

Investigating variation in immunity and infection risk in wild ungulates

The influence of biophysical feedbacks and species interactions on grass invasions and coastal dune morphology in the Pacific Northwest, USA

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