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Filtering by: Advisor Pytkowicz, Ricardo M. Remove constraint Advisor: Pytkowicz, Ricardo M. Decade 2010-2019 Remove constraint Decade: 2010-2019

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  • Physiological impacts of groundwater and surface water application on desert graminoids of different geographic origin

    Creator:
    Abdallah, Mohamed (Mohamed Ahmed B.)
    Abstract:
    Desert plant communities are among the most sensitive to changes in soil water conditions. In areas with shallow aquifers, it is important to understand both the effects of groundwater alterations on vegetation and how changes in surface-soil water affect plant water uptake. Studies in arid environments have evaluated the effect...
    Resource Type:
    Masters Thesis
    Full Text:
    : Ricardo Mata-Gonzalez Desert plant communities are among the most sensitive to changes in soil water

  • A study on the effects of enhanced pCO2 on open ocean diazotrophic assemblages

    Creator:
    Gradoville, Mary Rose
    Abstract:
    Biological di-nitrogen (N₂) fixation is a key process in open-ocean ecosystems, where the new nitrogen (N) provided by marine diazotrophs can support a large fraction of primary productivity and carbon (C) drawdown. Recent laboratory studies have shown that elevated pCO₂ enhances the rate of N₂ fixation by select laboratory isolates...
    Resource Type:
    Masters Thesis
    Full Text:
    : _____________________________________________________________________ Ricardo M. Letelier Biological di-nitrogen (N2) fixation is a key process in open-ocean

  • Marine Nitrogen Subsidies to Terrestrial Systems: Transport Through Wrack Deposition

    Creator:
    Traylor, Andrew
    Abstract:
    Fluctuations in one system affect adjacent systems; mechanistic understanding of linkages helps conservation efforts be more effective by focusing on influential species and areas that facilitate connections between ecosystems. This study explored marine-derived nutrient inputs to adjacent terrestrial communities. We quantified wrack (seaweed and other organic matter) deposition at sites...
    Resource Type:
    Honors College Thesis
    Full Text:
    : _______________________________________________________________ Ricardo Letelier Abstract body

  • 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:
    : Angelicque E. White Ricardo M. Letelier Yvette H. Spitz Under conditions of fixed N