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    Factors affecting the distribution and abundance of submersed aquatic vegetation in Topock Marsh, an impounded desert wetland

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    Author
    Alanen, Marit Ingrid
    Issue Date
    1998
    Keywords
    Biology, Botany.
    Agriculture, Forestry and Wildlife.
    Advisor
    McIvor, Carole C.
    
    Metadata
    Show full item record
    Publisher
    The University of Arizona.
    Rights
    Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
    Abstract
    To determine the factors affecting the distribution and abundance of submersed aquatic vegetation (SAV) within Topock Marsh, I measured 4 factors: (1) light availability (water depth and turbidity); (2) substrate type (grain size and organic content); (3) sediment nutrient availability; and (4) exposure to wave action. Multiple regression indicated that turbidity negatively affected the distribution and abundance of SAV in Topock Marsh during 1996 and 1997. Principal components analysis of sediment data in combination with a manipulative experiment indicated substrate type and sediment nutrients may influence SAV. Young shoots of Najas marina L. grew taller and had more branches when grown in sediments that had a smaller grain size and relatively higher amounts of NH4-N and soluble K. If the main objective of the refuge is to provide waterfowl foraging habitat, careful manipulation of water levels may be necessary to adequately promote the growth of SAV in Topock Marsh.
    Type
    text
    Thesis-Reproduction (electronic)
    Degree Name
    M.S.
    Degree Level
    masters
    Degree Program
    Graduate College
    Wildlife and Fisheries Science
    Degree Grantor
    University of Arizona
    Collections
    Master's Theses

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