Index Catalog // ScholarsArchive@OSU

Rocky intertidal oceanography: an association between community structure and nearshore phytoplankton concentration

Creator:: Menge, Bruce A., Daley, Bryon A., Wheeler, Patricia A., and Strub, P. Ted
Abstract:: On Oregon coastal rocky shores, filter‐feeders were relatively abundant and macrophytes were relatively scarce at Strawberry Hill, whereas opposite abundance patterns occurred at Boiler Bay. To determine whether nearshore oceanographic differences were associated with these patterns, we made shore‐based measurements of nutrient and Chl a concentrations. We used a three‐level...
Resource Type:: Article
Full Text:: MENGE, BRUCE A., BRYON A. DALEY, PATRICIA A. WHEELER, AND P

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:: -weekly oceanographic surveys (1970-1972). This region has a strong cross-shelf change in euphausiid

The role of sulfur in the preservation of isoprenoid hydrocarbons in sedimentary materials of the Washington continental margin

Creator:: Pinto Alvarez, Luis A.
Abstract:: A systematic study of highly branched isoprenoids (HBI) was carried out in suspended particulate material (SPM) and Washington coastal sediments to determine their origin and fate. SPM collected at 10 m depth was filtered through Nitex membranes. C₂₅ HBI were found only in the 1.2-40 μm range over the shelf....
Resource Type:: Dissertation
Full Text:: Continental Margin. Abstract approved: Fredrick G. Prahi A systematic study of highly branched isoprenoids

Basic Concepts to Develop a Marine Pollution Monitoring Program at the Tijuana-Ensenada Corridor, Baja California, Mexico

Creator:: Alvarez-Vazquez, Hector
Abstract:: The development of a Marine Pollution Monitoring Program (MPMP), in any coastal area of the world, requires a precise knowledge of the functioning of the local ecosystem. Because of the differences found in every coastal ecosystem, it is important to recognize and characterize the reservoirs and significant environments that maintain...
Resource Type:: Capstone Project
Full Text:: eye on other type of pollutants, such as metals. Lately, Sanudo-Wilhelmy and Flegal (1991) made some

Geochemical cycling in a Pacific Northwest estuary (Tillamook Bay, Oregon, USA)

Creator:: Colbert, Debbie L.
Abstract:: This thesis investigates the behavior of major inorganic nutrients (P, N, Si), trace metals (Mn, Fe), and alkaline-earth metals (Ba) within Tillamook Bay over seasonal cycles and under a range of river discharge conditions from October 1997 through December 1999. Located in the Pacific Northwest region, Tillamook Bay is an...
Resource Type:: Dissertation
Full Text:: Cycling in a Pacific Northwest Estuary (Tillamook Bay, Oregon, USA). Abstract approved: James McManus

Nitrogen isotopes in a global ocean biogeochemical model : constraints on the coupling between denitrification and nitrogen fixation

Creator:: Somes, Christopher J.
Abstract:: We present a new nitrogen isotope model incorporated into the three-dimensional ocean component of a global Earth System Climate Model designed for millennial timescale simulations. The model includes prognostic tracers for the stable nitrogen isotopes, ¹⁴N and ¹⁵N, in the nitrate (NO₃ˉ), phytoplankton, zooplankton, and detritus variables of the marine...
Resource Type:: Masters Thesis
Full Text:: presented on June 30, 2009. Title: Nitrogen Isotopes in a Global Ocean Biogeochemical Model

Nitrogen isotope simulations show the importance of atmospheric iron deposition for nitrogen fixation across the Pacific Ocean

Creator:: Somes, Christopher J., Schmittner, Andreas, and Altabet, Mark A.
Abstract:: Nitrogen (N) fixation by specialized microorganisms (diazotrophs) influences global plankton productivity because it provides the ocean with most of its bio-available N. However, its global rate and large-scale spatial distribution is still regarded with considerable uncertainty. Here we use a global ocean nitrogen isotope model, in comparison with δ15NO3 observations,...
Resource Type:: Article
Full Text:: a large structural iron (Fe) requirement [Raven, 1988; 156Sanudo‐Wilhelmy et al., 2001]. Diazotrophs

Phosphorus control of nitrogen fixation

Creator:: Watkins-Brandt, Katie S.
Abstract:: Under conditions of fixed N-limitation, as with most oligotrophic systems, the process of biological N₂ fixation (diazotrophy) is favored, provided the necessary trace elements and vitamins are sufficient. Despite the well understood contributions of N₂ fixation in oligotrophic regions, the nutritional and ecological controls of marine diazotrophs have not been...
Resource Type:: Masters Thesis
Full Text:: carbon (Karl et al. 1997; Sañudo-Wilhelmy et al. 2001; Hutchins et al. 2007). Numerous studies have

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:: world's oceans. Biogeochemistry 57/58: 47-98. KUSTKA, A. B., S. A. SAÑUDO WILHELMY, E. J. CARPENTER, D

Vertical distribution patterns of plankton and their relationship to physical factors over the continental shelf off Oregon

Creator:: Sutor, Malinda
Abstract:: Discrete layers of phytoplankton and zooplankton were observed over the Oregon continental shelf in summer and fall of 2001 and summer 2002 using optical and acoustical technologies and a pump sampling system. Layers of phytoplankton had steep vertical gradients which were associated with gradients in density and local peaks in...
Resource Type:: Dissertation
Full Text:: technologies and a pump sampling system. Layers of phytoplankton had steep vertical gradients which were

ScholarsArchive@OSU

Rocky intertidal oceanography: an association between community structure and nearshore phytoplankton concentration

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 role of sulfur in the preservation of isoprenoid hydrocarbons in sedimentary materials of the Washington continental margin

Basic Concepts to Develop a Marine Pollution Monitoring Program at the Tijuana-Ensenada Corridor, Baja California, Mexico

Geochemical cycling in a Pacific Northwest estuary (Tillamook Bay, Oregon, USA)

Nitrogen isotopes in a global ocean biogeochemical model : constraints on the coupling between denitrification and nitrogen fixation

Nitrogen isotope simulations show the importance of atmospheric iron deposition for nitrogen fixation across the Pacific Ocean

Phosphorus control of nitrogen fixation

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

Vertical distribution patterns of plankton and their relationship to physical factors over the continental shelf off Oregon

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