Index Catalog // ScholarsArchive@OSU

Oceanographic influences on rocky intertidal communities : coastal upwelling, invertebrate growth rates, and keystone predation

Creator:: Sanford, Eric (Eric David)
Abstract:: The influence of large-scale processes on natural communities has become one of the central issues of modern ecology. I combined field and laboratory studies to investigate the effects of variation in coastal upwelling on rocky intertidal communities along the central Oregon coast. I examined whether the growth of intertidal barnacles...
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE DISSERTATION OF Eric Sanford for the

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:: : Sally D. Hacker Eric W. Seabloom Biological invasions provide a unique opportunity to study

The roles of provenance and phylogeny in recruitment, community assembly, and species coexistence in invaded California grasslands

Creator:: Brandt, Angela J.
Abstract:: Biological invasions pose one of the greatest threats to global biodiversity, but many naturalized invaders coexist with the native community. Community ecology theory provides a framework for understanding the mechanisms by which invaders might coexist with native species or exclude them from the community, thus informing management practices to maximize...
Resource Type:: Dissertation
Full Text:: Coexistence in Invaded California Grasslands Abstract approved: Eric W. Seabloom Sally D

Natural history and evolution of a color polymorphism in Rana pipiens, the northern leopard frog

Creator:: Hoffman, Eric A.
Abstract:: A primary goal of population genetics is to identify the role of microevolutionary forces in producing observed patterns of molecular and phenotypic variation. I conducted four studies in the northern leopard frog, Rana pipiens, to determine just how mutation, migration, genetic drift, and selection influenced, genetic structure of mitochondrial DNA...
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE DISSERTATION OF Eric A. Hoffman for the

Hydroxyindole-O-methyltransferase (HIOMT) activity in the pineal of chinook salmon (Oncorhynchus tshawytscha)

Creator:: Birks, Eric K.
Abstract:: C-methyltransferase (HIOMT) in chinook salmon (Oncorhynchus tshawytscha). Various body tissues, as well as several morphological brain divisions were tested for the presence of HIOMT. Activity was found in the retina, the dorsal portion of the diencephalon, and in the pineal gland of chinook. However, the activity was significantly higher in...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF ERIC K. BIRKS for the degree

Patterns and dynamics of context-dependency in the marine rocky intertidal

Creator:: Berlow, Eric Layani
Abstract:: As ecologists are being called upon to predict the consequences of human perturbations to natural communities, an important goal is to understand what factors drive variability or consistency in nature. In the rocky intertidal of San Juan Island, Washington, a comparative experimental approach was used to investigate spatial and temporal...
Resource Type:: Dissertation
Full Text:: rocky intertidal AN ABSTRACT OF THE THESIS OF Eric Layani Berlow for the degree of Doctor of

Eelgrass-macroalgae interactions; context-dependency in upwelling-influenced estuaries

Creator:: Hessing-Lewis, Margot
Abstract:: This dissertation investigates the context-dependency of species interactions between seagrass and macroalgae in upwelling-influenced estuaries. In all coastal systems, nutrient loading is multidirectional, resulting from mostly freshwater and marine inputs. The directionality of nutrient inputs may affect the rate of supply of organic matter to the system. In systems where...
Resource Type:: Dissertation

Bridging environmental physiology and community ecology : temperature effects at the community level

Creator:: Iles, Alison C.
Abstract:: Most climate change predictions focus on the response of individual species to changing local conditions and ignore species interactions, largely due to the lack of a sound theoretical foundation for how interactions are expected to change with climate and how to incorporate them into climate change models. Much of the...
Resource Type:: Dissertation
Full Text:: guidance of my committee members, especially Eric Berlow, whose imagination and creativity always keeps

Geographic variation and systematics of the western Plethodon

Creator:: Brodie, Edmund D.
Abstract:: The western Plethodon include vandykei vandykei, v. idahoensis, larselli, dunni,vehiculum, stormi, elongatus, and an undescribed form referred to as the "unstriped" Plethodon. These salamanders have been placed into three species groups: the Vandykei group, the Vehiculum group, and the Elongatus group. Range maps are provided and geographic variation is discussed...
Resource Type:: Dissertation
Full Text:: western Plethodon include vandykei vandykei, v. idahoen- sis, larselli, dunni,vehiculum, stormi

Abiotic and biotic predictors of coastal giant salamander (Dicamptodon tenebrosus) in headwaters of the Oregon Coast Range

Creator:: Neal, Nathaniel G.
Abstract:: From British Columbia to northern California, coastal giant salamanders (Dicamptodon tenebrosus) are a dominant vertebrate predator in headwater streams. Though widespread, salamander health and abundance levels differ greatly between locations, provoking the question as to what factors may influence this variation and whether habitat features or biotic variables play a...
Resource Type:: Honors College Thesis
Full Text:: substrate and the presence of fine sediment (Sepulveda and Lowe, 2009). Contrasting predictions within the

ScholarsArchive@OSU

Oceanographic influences on rocky intertidal communities : coastal upwelling, invertebrate growth rates, and keystone predation

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

The roles of provenance and phylogeny in recruitment, community assembly, and species coexistence in invaded California grasslands

Natural history and evolution of a color polymorphism in Rana pipiens, the northern leopard frog

Hydroxyindole-O-methyltransferase (HIOMT) activity in the pineal of chinook salmon (Oncorhynchus tshawytscha)

Patterns and dynamics of context-dependency in the marine rocky intertidal

Eelgrass-macroalgae interactions; context-dependency in upwelling-influenced estuaries

Bridging environmental physiology and community ecology : temperature effects at the community level

Geographic variation and systematics of the western Plethodon

Abiotic and biotic predictors of coastal giant salamander (Dicamptodon tenebrosus) in headwaters of the Oregon Coast Range

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