Index Catalog // ScholarsArchive@OSU

Investigating the ecological role of cell signaling in free-living marine heterotrophic protists

Creator:: Hartz, Aaron J.
Abstract:: Phagotrophic protists are major consumers of microbial biomass in aquatic ecosystems. However, biochemical mechanisms underlying prey recognition and phagocytosis by protists are not well understood. We investigated the potential roles of cell signaling mechanisms in chemosensory response to prey, and in capture of prey cells, by a marine ciliate (Uronema...
Resource Type:: Masters Thesis
Full Text::   Heterotrophic Protists.    Abstract approved:      Barry F. Sherr      Phagotrophic protists are major

The effect of protistan bacterivory on bacterioplankton community structure

Creator:: Suzuki, Marcelino
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE THESIS OF Marcelino T. Suzuki for the degree

Bacterioplankton in the Oregon upwelling system: distribution, cell-specific leucine incorporation, and diversity

Creator:: Longnecker, Krista
Abstract:: Marine bacterioplankton play an important role in global elemental cycles because they return carbon dioxide and nutrients to the biosphere as they reduce organic matter. Furthermore, marine bacterioplankton are not uniformly active, and subpopulations of the in situ community may be more or less active at any given time. Defining...
Resource Type:: Dissertation
Full Text:: approved: Barry F. Sherr Marine bacterioplankton play an important role in global elemental cycles

Phosphorus physiology and environmental forcing of oceanic cyanobacteria, primarily Trichodesmium spp.

Creator:: White, Angelicque E.
Abstract:: The biological transformation of dinitrogen gas (N2) into combined forms(termed N2 fixation) by certain genera of oceanic cyanobacteria represents the largest incoming flux of nitrogen to the global ocean. As such, biological nitrogen fixation plays a significant role in the regulation of oceanic productivity and the export of carbon and...
Resource Type:: Dissertation
Full Text:: appreciative of the time and effort that my committee members (Ricardo Letelier, Yvette Spitz, Barry Sherr

Laboratory simulated hydrothermal alteration of sedimentary organic matter from Guaymas Basin, Gulf of California

Creator:: Leif, Roald N.
Resource Type:: Dissertation
Full Text:: approved: Bernd R. T. Simoneit High temperature alteration of sedimentary organic matter associated with

The effects of physical parameters on the absorption coefficient of natural waters

Creator:: Pegau, W. Scott
Resource Type:: Dissertation
Full Text:: members of my committee, Dr. Timothy Cowles, Dr. Barry Sherr, and Dr. Robert Olson, their time and effort

Metabolically active bacteria in Lake Kinneret

Creator:: Berman, T., Kaplan, B., Chava, S., Viner, Y., Sherr, Barry F., and Sherr, Evelyn
Abstract:: Three staining methods were used to identify metabolically active bacteria in Lake Kinneret, northern Israel: CTC, DAPI staining followed by a propanol wash, and the Molecular Probes Live/Dead stain. Positive results from these methods purport to show, respectively, actively respiring bacteria (CTC+), cells with intact nucleoids (NuCC), and cells with...
Resource Type:: Article
Full Text:: 2001 *E-mail: tberman@ocean.org.il Metabolically active bacteria in Lake Kinneret T. Berman1,*, B

Numerical model investigations of wind-driven coastal circulation

Creator:: Cervantes, Brandy T.
Abstract:: The effects of wind forcing on coastal ocean circulation are studied using a numerical modeling approach. The first region of interest is on the North Carolina shelf, where the Coastal Ocean Processes (CoOP) Inner Shelf Study (ISS) took place during August - November 1994. ISS observations are used to initialize,...
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE DISSERTATION OF Brandy T. Cervantes for the

Comparative study of the population dynamics, secondary productivity, and reproductive ecology of the euphausiids Euphausia pacifica and Thysanoessa spinifera in the Oregon upwelling region

Creator:: Gutierrez, Jaime Gomez
Abstract:: I compare the seasonal abundance variation, population dynamics, fecundity, egg hatching mechanism and success, and apostome ciliate parasites of the euphausiids Euphausia pac?fica and Thysanoessa spinfera from the Oregon coast, USA. Community structure and nearshore distributions were examined from bi-weekly oceanographic surveys (1970-1972). This region has a strong cross-shelf change...
Resource Type:: Dissertation
Full Text:: assemblages located about 45 km from shore. Euphausia pacflca and T. spinfera have life stage-segregated

The Relationship between Winds, Surface Roughness, and Radar Backscatter at Low Incidence Angles from TRMM Precipitation Radar Measurements

Creator:: Freilich, Michael H. and Vanhoff, Barry A.
Abstract:: One year of collocated, rain-free normalized backscatter cross-section measurements from the Tropical Rainfall Mapping Mission (TRMM) precipitation radar (PR) and wind speed estimates from the TRMM Microwave Imager are used to construct fully empirical model functions relating cross section to wind speed for incidence angles from 0° (nadir) to 18°....
Resource Type:: Article
Full Text:: . FREILICH AND BARRY A. VANHOFF College of Oceanic and Atmospheric Sciences, Oregon State University

ScholarsArchive@OSU

Investigating the ecological role of cell signaling in free-living marine heterotrophic protists

The effect of protistan bacterivory on bacterioplankton community structure

Bacterioplankton in the Oregon upwelling system: distribution, cell-specific leucine incorporation, and diversity

Phosphorus physiology and environmental forcing of oceanic cyanobacteria, primarily Trichodesmium spp.

Laboratory simulated hydrothermal alteration of sedimentary organic matter from Guaymas Basin, Gulf of California

The effects of physical parameters on the absorption coefficient of natural waters

Metabolically active bacteria in Lake Kinneret

Numerical model investigations of wind-driven coastal circulation

Comparative study of the population dynamics, secondary productivity, and reproductive ecology of the euphausiids Euphausia pacifica and Thysanoessa spinifera in the Oregon upwelling region

The Relationship between Winds, Surface Roughness, and Radar Backscatter at Low Incidence Angles from TRMM Precipitation Radar Measurements

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