Index Catalog // ScholarsArchive@OSU

The Secret Life of Estuaries: Phytoplankton-determined Seasonality of Particulate Organic Carbon in Cathlamet Bay and the Columbia River Estuary

Creator:: Shumway, David O.
Abstract:: This study investigated the composition and character of organic matter on suspended particulate material (SPM) in the Columbia River estuary system to determine the contribution of biological activity in lateral bays to the greater nutrient cycle of the river. Water samples were collected during neap and spring tidal forcing (25...
Resource Type:: Honors College Thesis

Hydrogen isotopic composition of C₃₇ alkenones and the ecology and physiology of coccolithophores

Creator:: Wolhowe, Matthew D.
Abstract:: A three-part study was conducted into the impact of physiological and ecological variables on the net isotopic fractionation of hydrogen, α[subscript K₃₇], expressed in C₃₇ alkenones. First, alkenone-producer production, abundance, and export were characterized in the summertime Gulf of California and Eastern Tropical North Pacific using compound-specific, labeled in situ...
Resource Type:: Dissertation

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

Annual cycles of organic matter and phytoplankton attributes in the Columbia and Willamette Rivers, with reference to the Columbia River Estuary

Creator:: Sullivan, Barbara Elaine
Resource Type:: Masters Thesis

Use of sediment fractionation techniques to establish a geochemical link between natural-occurring PAH and 3-oxytriterpenoids in Columbia River sediments

Creator:: Pinto Alvarez, Luis Antonio
Resource Type:: Masters Thesis

Biomarker analysis of marine and terrestrial organic carbon sources and a paleotemperature record from MANOP site C sediments, equatorial Pacific

Creator:: Muehlhausen, Laurel A.
Resource Type:: Masters Thesis

Characterization of organic matter quality and content in Columbia River suspended particulate matter by cupric oxide oxidation

Creator:: Alleau, Yvan M.
Abstract:: The organic content of the Columbia River suspended particulate matter (SPM) results from the input of autochthonous (phytoplankton) and allochthonous (terrestrial vascular plants) production. The contribution of these two sources appears seasonal and responds to factors such as rainfall, runoff, river flow, light and nutrients availability. While numerous studies have...
Resource Type:: Masters Thesis

Determination of unsaturation-, growth phase-, and growth rate-dependent hydrogen isotopic fractionation in C₃₇ alkenones produced by Emiliania huxleyi

Creator:: Wolhowe, Matthew D.
Abstract:: Recent works have investigated use of the hydrogen isotopic composition of C₃₇ alkenones (δD[subscript K37s]), lipid biomarkers of certain haptophyte microalgae, as an independent paleosalinity proxy. I discuss herein the factors impeding such an application and identify the potential alternative use of δD[subscript K37s] measurements as a proxy for non-thermal,...
Resource Type:: Masters Thesis

An examination of the form and variability of manganese oxide in Columbia River suspended material

Creator:: Covert, Paul Allister
Abstract:: Suspended particulate matter (SPM) in the Columbia River is a mixture of particles of several origins having varying physical and biogeochemical properties. The relative abundances of these freshwater particles changes with season and apparently also with tide. Prior investigation has quantified seasonal variation of organic material in both the Columbia...
Resource Type:: Masters Thesis

An investigation into nitrogen uptake by Emilania huxleyi during continuous darkness

Creator:: Royer, Ida M.
Abstract:: Experiments were conducted with two strains of the coccolithophorid Emiliania huxleyi. Previous experiments with CCMP1742 and 372 at a light intensity of 60 µEin/m²-s showed that during five-day periods of continuous darkness, strain 1742 was taking up nitrate from the media while strain 372 was not. The nitrate uptake in...
Resource Type:: Masters Thesis

ScholarsArchive@OSU

The Secret Life of Estuaries: Phytoplankton-determined Seasonality of Particulate Organic Carbon in Cathlamet Bay and the Columbia River Estuary

Hydrogen isotopic composition of C₃₇ alkenones and the ecology and physiology of coccolithophores

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

Annual cycles of organic matter and phytoplankton attributes in the Columbia and Willamette Rivers, with reference to the Columbia River Estuary

Use of sediment fractionation techniques to establish a geochemical link between natural-occurring PAH and 3-oxytriterpenoids in Columbia River sediments

Biomarker analysis of marine and terrestrial organic carbon sources and a paleotemperature record from MANOP site C sediments, equatorial Pacific

Characterization of organic matter quality and content in Columbia River suspended particulate matter by cupric oxide oxidation

Determination of unsaturation-, growth phase-, and growth rate-dependent hydrogen isotopic fractionation in C₃₇ alkenones produced by Emiliania huxleyi

An examination of the form and variability of manganese oxide in Columbia River suspended material

An investigation into nitrogen uptake by Emilania huxleyi during continuous darkness

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