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  • A New Record of Planktic Foraminifera Community Response to Marine Heatwaves in the Northeast Pacific

    Creator:
    M. Kelsey Lane
    Abstract:
    Marine heat waves are forecasted to increase in frequency and intensity under future climate scenarios, but little is known about the impact of these events on the one of the most commonly used proxies of ocean temperature - foraminiferal assemblages. This research explores the planktic foraminifera community along the Newport...
    Resource Type:
    Masters Thesis
    Full Text:
    foraminifera out of plankton samples. I would also like to acknowledge everyone involved with the Newport

  • 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:
    Patterns of Plankton and Their Relationship to Physical Factors over the Oregon Continental Shelf Abstract

  • The Effects of Phytoplankton Prey Species and Nutrient Limitation on Microzooplankton

    Creator:
    McBeain, Kelsey Ann
    Abstract:
    Phytoplankton and microzooplankton comprise the base and the first link of the marine food web, respectively. These microbes are key drivers of marine carbon and nutrient cycles. Phytoplankton convert atmospheric CO₂ into organic carbon, and microzooplankton consume phytoplankton, packaging phytoplankton carbon into particulate forms that have a variety of fates:...
    Resource Type:
    Masters Thesis
    Full Text:
    shallow mixed layer via plankton uptake and utilization and sinking of dead cells and fecal pellets

  • Turbulence and biophysical fluxes in the near surface ocean

    Creator:
    Hoecker-Martínez, Martín
    Abstract:
    Vertical transports of plankton, momentum, heat, and turbulence are modeled. A novel integration of high resolution turbulence and biophysical modeling is used to show the influence of a Kelvin-Helmholtz instability on the vertical migration of simple gyrotactic organisms. A viscous limit on mixing driven by shear turbulence is proposed. Large...
    Resource Type:
    Dissertation
    Full Text:
    plankton, momentum, heat, and turbulence are modeled. A novel integration of high resolution turbulence

  • Zooplankton of the Galapagos Islands

    Creator:
    Figueroa, Diego
    Abstract:
    The marine climate of the Galapagos is spatially and seasonally heterogeneous. A taxonomically comprehensive study of Galapagos zooplankton has never been done. This study is an initial effort to establish the distribution and community structure of zooplankton in the Archipelago. I collected zooplankton samples by vertical tows over the Galapagos...
    Resource Type:
    Dissertation
    Full Text:
    (Fernandez-Alamo and Farber-Lorda, 2006). Plankton collected by net tows during these expeditions led to

  • 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:
    
chemical
defense
ecology
of
marine
unicellular
plankton:
 constraints,
mechanisms,
and
impacts.
Biol.
Bull

  • Remineralization of marine particulate organic matter

    Creator:
    Burkhardt, Brian Gary
    Abstract:
    Marine microorganisms play a significant role in the cycling of nutrients in the open ocean through production, consumption, and degradation of organic matter (OM). Carbon (C), nitrogen (N), and phosphorus (P) are essential ingredients in every known recipe for life. However, the cycling of each of these elements proceeds at...
    Resource Type:
    Masters Thesis
    Full Text:
    primary production in the ocean from satellite radiometer data, Journal of Plankton Research, 17(6

  • Quantification of Osmolytes in the Sargasso Sea Surface Layer Water Column

    Creator:
    Muslin, Omran
    Abstract:
    Oceanic carbon cycling plays a major role in determining global atmospheric CO₂. A better understanding of dissolved organic matter and its constituents in the water column and how it affects marine carbon cycling is sought after. This study successfully measured osmolytes, low molecular zwitterionic compounds derived from amino acids, in...
    Resource Type:
    Masters Thesis
    Full Text:
    this ecologically important process. It is estimated that marine plankton produce about 109 tons of