• Libraries
    • Log in to:
    View Item 
    •   MSpace Home
    • Faculty of Graduate Studies (Electronic Theses and Practica)
    • FGS - Electronic Theses and Practica
    • View Item
    •   MSpace Home
    • Faculty of Graduate Studies (Electronic Theses and Practica)
    • FGS - Electronic Theses and Practica
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Impacts of nutrients and insecticide on algal production in a prairie wetland

    Thumbnail
    View/Open
    MQ56142.pdf (6.119Mb)
    Date
    2000-05-01
    Author
    North, April Kiers
    Metadata
    Show full item record
    Abstract
    I added nutrients (inorganic nitrogen and phosphorus) and the arthropod-specific insecticide chlorpyrifos to large (20,000L) experimental enclosures in the Blind Channel of Delta Marsh, Manitoba. I hypothesized that nutrient addition would lead to an increase in algal production (approximated by chlorophyll 'a' concentration), that the application of insecticide would indirectly result in increased algal production (through the elimination of herbivorous zooplankton), and that the combination of both nutrients and insecticide would elicit greater algal production than either factor alone. I conducted two ancillary experiments to assess the limiting nutrient at the study site. I conclude that Delta Marsh, Manitoba is susceptible to nutrient inputs from the surrounding agricultural land, especially in areas where nitrogen-based fertilizers are used. Although it is widely believed that wetlands are inexhaustible filters for pollutants, I predict that continual nutrient enrichment of this wetland will evoke irreparable changes to the base of the food web. A shift away from macrophytes and epiphyton to phytoplankton dominance will negatively impact the ability of Delta Marsh to sustain its upper trophic levels (fish and waterfowl). (Abstract shortened by UMI.)
    URI
    http://hdl.handle.net/1993/2491
    Collections
    • FGS - Electronic Theses and Practica [25494]

    DSpace software copyright © 2002-2016  DuraSpace
    Contact Us | Send Feedback
    Theme by 
    Atmire NV
     

     

    Browse

    All of MSpaceCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

    My Account

    Login

    Statistics

    View Usage Statistics

    DSpace software copyright © 2002-2016  DuraSpace
    Contact Us | Send Feedback
    Theme by 
    Atmire NV