Index Catalog // ScholarsArchive@OSU

Bottom-up and top-down forces in tidepools : the influence of nutrients, herbivores, and wave exposure on community structure

Creator:: Nielsen, Karina Johanna
Abstract:: The relationship between nutrients and community structure is poorly understood in open-coast habitats. I created a system of artificial tidepools, of identical age and physical dimensions, at two sites that differed in wave exposure, and manipulated nutrient levels and the abundance of herbivores. Using these unique field mesocosms, I explored...
Resource Type:: Dissertation
Full Text:: Johanna Nielsen for the degree of Doctor of Philosophy in Zoology presented on August 27, 1998. Title

Impacts of Ocean Acidification on Coralline Algae : From Species to Community Consequences

Creator:: Shen, Chenchen
Abstract:: Oceanic uptake of rising anthropogenic CO₂ emissions has caused the emergence of ocean acidification as a major threat to marine ecosystems worldwide. Along eastern boundary current systems, seawater is naturally acidified due to coastal upwelling of low pH seawater from depth. Compounded by ocean acidification, upwelling regions are expected to...
Resource Type:: Dissertation
Full Text:: presence to my committee. He has been extremely reliable and responsive. In Karina Nielsen, I have always

Biodiversity : illustrations of some concepts, causes, and consequences

Creator:: Russell, Roland B.
Abstract:: Careful analysis and thoughtful synthesis will be necessary for expanding the envelope of ecological understanding. This work is my attempt at communicating both of these, in relation to three questions about our understanding of the structure and dynamics of biological diversity. These questions focus on a) advancing our understanding of...
Resource Type:: Dissertation
Full Text:: AN ABSTRACT FOR THE DISSERTATION OF Roland B. Russell for the

Phytoplankton shading of marine benthic macrophytes: Implications for intertidal community structure

Creator:: Kavanaugh, Maria T.
Abstract:: Previous observations of light levels and phytoplankton abundances along the Oregon coast demonstrated that phytoplankton attenuated light sufficiently to potentially limit the growth of intertidal macrophytes and therefore structure local intertidal communities. Inspired by this observation, in spring 2004, I initiated a study to quantify the direct and indirect benthic...
Resource Type:: Masters Thesis
Full Text:: included Dr. Karina Nielsen, my minor professors- Dr. Ricardo Letelier (Oceanography) and Dr. Lisa Madsen

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:: 15, 2007. Title: Indirect Effects of Ultraviolet-B Radiation on Larval Amphibians as Mediated by

Larval ecology of Pandalus jordani Rathbun

Creator:: Rothlisberg, Peter Charles
Resource Type:: Dissertation
Full Text:: RATHBUN Abstract approved: Charles B. Miller In this study the distribution and abundance of larval

Changing Climate, Changing Contexts : Variation in Rocky Intertidal Predator-prey Interactions Seen Through an Environmental Stress Framework

Creator:: Cerny-Chipman, Elizabeth B.
Abstract:: The multifaceted role of the environment in regulating the structure and dynamics of biological communities has long fascinated ecologists and motivated much debate and research. Now, in a time of accelerated global changes due to human impacts, the need to understand how the environment shapes communities has gained new urgency....
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE DISSERTATION OF Elizabeth B. Cerny-Chipman for the degree of Doctor of

The ontogeny and mediation of sexual size dimorphism in the red-spotted garter snake, Thamnophis sirtalis concinnus

Creator:: Lerner, Darren T.
Abstract:: A wide range of environmental and physiological factors influence the type and extent of sexual dimorphism found in animals. Influential factors include variable climate, competition for resources and mates, mate choice, and parental investment. In addition, some investigators attribute differences in body size to physiological factors influenced by genetic and...
Resource Type:: Masters Thesis
Full Text:: causes of sexual dimorphism (Darwin, 1871; Trivers, 1972; Brown, 1975; Wilson, 1975; Trivers, 1976

Pheromone mechanisms and behavioral strategies for maximizing courtship success in a terrestrial salamander, Plethodon shermani

Creator:: Vaccaro, Elyse A.
Abstract:: Darwin devised the evolutionary theory of sexual selection to account for the manifold extravagances of courtship behaviors and displays. Mating interactions represent a major evolutionary process driving the elaboration, vibrancy, and peculiarity of these courtship traits. For my dissertation research, I strived to elucidate the dynamics that constitute the complex...
Resource Type:: Dissertation
Full Text:: Salamander, Plethodon shermani Abstract approved: Lynne D. Houck Darwin

Genetic and phenotypic variation associated with the resistance gene SOD1 in Biomphalaria glabrata, an important intermediate host of Schistosomiasis

Creator:: Bonner, Kaitlin M.
Abstract:: Schistosomiasis afflicts 200 million people and is responsible for 200,000 deaths per year. The infection is caused by a digenean trematode in the genus Schistosoma. The parasite must cycle through both a vertebrate (human) and invertebrate (snail) host to complete the life cycle. My dissertation focuses on the genetic mechanisms...
Resource Type:: Dissertation
Full Text:: laboratory strains of both the snail and trematode species. The B. glabrata/S. mansoni system serves as a

ScholarsArchive@OSU

Bottom-up and top-down forces in tidepools : the influence of nutrients, herbivores, and wave exposure on community structure

Impacts of Ocean Acidification on Coralline Algae : From Species to Community Consequences

Biodiversity : illustrations of some concepts, causes, and consequences

Phytoplankton shading of marine benthic macrophytes: Implications for intertidal community structure

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

Larval ecology of Pandalus jordani Rathbun

Changing Climate, Changing Contexts : Variation in Rocky Intertidal Predator-prey Interactions Seen Through an Environmental Stress Framework

The ontogeny and mediation of sexual size dimorphism in the red-spotted garter snake, Thamnophis sirtalis concinnus

Pheromone mechanisms and behavioral strategies for maximizing courtship success in a terrestrial salamander, Plethodon shermani

Genetic and phenotypic variation associated with the resistance gene SOD1 in Biomphalaria glabrata, an important intermediate host of Schistosomiasis

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