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Filtering by: Creator Navarrete, Ricardo, Jr. Remove constraint Creator: Navarrete, Ricardo, Jr. Decade 2000-2009 Remove constraint Decade: 2000-2009 Degree Level Doctoral Remove constraint Degree Level: Doctoral

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  • The South Atlantic Ocean response to local and remote forcings

    Creator:
    Fetter Filho, Antonio F. H.
    Abstract:
    The local and remote sources of variability of the South Atlantic Ocean are investigated using a set of numerical experiments and satellite data. A global, eddy-permitting, numerical simulation is analyzed to investigate the dynamical links between the Antarctic Circumpolar Current (ACC) and the Malvinas Current (MC). The model results indicate...
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    South Atlantic Ocean Response to Local and Remote Forcings Abstract approved: Ricardo P. Matano The

  • 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...
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    Dissertation
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    : _____________________________________________________________________ Ricardo M. Letelier Yvette H. Spitz The biological

  • Seconds to hour scale photosynthetic responses in marine microalgae

    Creator:
    Laney, Samuel R.
    Abstract:
    Our view of phytoplankton has historically revolved around their inability to control their location in space. The term phytoplankton itself underscores this particular difference between phytoplankton and their sessile terrestrial counterparts. Yet there are other differences between land plants and the phytoplankton that are perhaps equally important, beyond this sessile-planktonic...
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    Abstract approved: _____________________________________________________________________ Ricardo M

  • The role of herbivores and productivity on community structure of rocky shores of the Galapagos Islands, Ecuador

    Creator:
    Vinueza, Luis R.
    Abstract:
    Ecosystems are facing increasing threats from human related activities, such as overfishing, pollution, habitat destruction, species invasions, and diseases, among others. While oceanic islands provide natural laboratories to understand ecological and evolutionary process, they are also particularly vulnerable to these impacts, given their usual isolation from the mainland and the...
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    and suggestions about how to improve my research, and Scott Heppell and Ricardo Letelier for

  • 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...
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    members (Kate Field, Steve Giovannoni, Wayne Huber, and Ricardo Letelier) have also asked intriguing and

  • Prokaryotes associated with marine crust

    Creator:
    Mason, Olivia Underwood
    Abstract:
    Oceanic crust covers nearly 70% of the Earth's surface, of which, the upper, sediment layer is estimated to harbor substantial microbial biomass. Marine crust; however, extends several kilometers beyond this surficial layer, and includes the basalt and gabbro layers. In particular, the basalt layer has high permeabilities which allows for...
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    also like to thank my committee members, Drs. Michael S. Rappé, Ricardo M. Letelier, Mario E. Magana

  • Late Quaternary paleoceanography of the Northeast Pacific and Atlantic Oceans based on diatom transfer functions

    Creator:
    Lopes, Cristina Isabel Coelho Dias
    Abstract:
    Modern upwelling conditions and corresponding oceanographic properties are investigated and reconstructed for the Late Quaternary. The oceanographic conditions considered influence diatom ecology and the record of fossil diatom frustules in the sediments. Diatoms from modern sediments are evaluated as paleoceanographic proxies and transfer functions (TFs) are calibrated using the Imbrie...
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    committee members Nicklas Pisias, Ricardo Letelier, Peter Clark and Stephen Giovannoni and to Jim McManus

  • Dynamics of organic matter production and degradation during coastal diatom blooms

    Creator:
    Wetz, Michael S.
    Abstract:
    Experiments were designed to answer key questions about diatom-derived organic matter cycling (i.e., production and degradation) in coastal systems. Dissolved organic matter (DOM) production was examined in axenic batch cultures of five diatom species. Dissolved organic carbon (DOC) release rates varied between species, but were significantly higher for all species...
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    ) Ricardo Letelier, who was one of the first faculty here other than Pat who I had significant

  • Ecological subsidies to rocky shore communities : setting the stage for community dynamics in the Northeast Pacific

    Creator:
    Krenz, Christopher
    Abstract:
    This dissertation focuses on the importance of pelagic subsidies in the Northeast Pacific to rocky shore community regulation. My results document the patterns of pelagic subsidy supply, determine if those subsidies are correlated with community structure, and examine if community regulation differs between areas of high- and low-subsidies. Understanding how...
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    1999b, Hughes et al. 2000, Navarrete et al. 2005). Some of the links, such as larval production and

  • A cognitive-motivational-relational examination of angry driving : applying Lazarus' model to a public health concern

    Creator:
    Flint, Matthew O.
    Abstract:
    Angry driving behaviors that lead to acts of road rage have become a major public health concern. Understanding the differences between people who drive with a high level of anger and those who do not provides insight into possible prevention approaches. This study applied Richard Lazarus' Cognitive-Motivational-Relational (CMR) Model to...
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    more dramatic. 4 Ricardo Martinez, who was the Naiona Highway and Traffic Safety Administrator, in