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    Resource Pulses and Spatial Subsidies in Ozark Karst Springs: Effects on Community Structure and Food Webs

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    Carroll_ku_0099D_10454_DATA_1.pdf (4.057Mb)
    Issue Date
    2009-06-23
    Author
    Carroll, Teresa Mae
    Publisher
    University of Kansas
    Format
    162 pages
    Type
    Dissertation
    Degree Level
    Ph.D.
    Discipline
    Ecology & Evolutionary Biology
    Rights
    This item is protected by copyright and unless otherwise specified the copyright of this thesis/dissertation is held by the author.
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    Abstract
    Spatial and temporal patterns of invertebrate community composition, biomass, functional diversity, foodweb dynamics, and foodweb complexity were examined in three Ozarks springs. Also examined was the effect of an experimental manipulation of algal production (function of light limitation) on foodweb pathways and complexity. Food source-consumer interactions were determined using carbon and nitrogen stable isotope and stoichiometric analyses. Biocomplexity and functional diversity increased temporally and spatially along the spring source-springbrook gradient likely due to variability in the composition and availability of food sources. Foodweb analyses indicated that the trophic base of the foodweb was autochthonous, shifting temporally towards a greater reliance on allochthonous resources. Spatial and temporal shifts in food availability and utilization were associated with corresponding increases in foodweb complexity. Isotope ratios, based on manipulation of algal production, indicated a shift toward more allochthonous-based pathways and increases in omnivory and foodweb complexity in manipulated (shaded) sections of the spring.
    URI
    http://hdl.handle.net/1808/5571
    Collections
    • Dissertations [4475]
    • Ecology & Evolutionary Biology Dissertations and Theses [349]

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    KU Libraries
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    785-864-8983

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    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

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