STP865: Realism and Replicability of Lentic Freshwater Microcosms

    Levy, D
    Staff scientist, research technician, research technician, staff scientist, and research technician, Lawrence Berkeley Laboratory, University of California at Berkeley, Berkeley, CA

    Lockett, G
    Staff scientist, research technician, research technician, staff scientist, and research technician, Lawrence Berkeley Laboratory, University of California at Berkeley, Berkeley, CA

    Oldfather, J
    Staff scientist, research technician, research technician, staff scientist, and research technician, Lawrence Berkeley Laboratory, University of California at Berkeley, Berkeley, CA

    Rees, J
    Staff scientist, research technician, research technician, staff scientist, and research technician, Lawrence Berkeley Laboratory, University of California at Berkeley, Berkeley, CA

    Saegebarth, E
    Staff scientist, research technician, research technician, staff scientist, and research technician, Lawrence Berkeley Laboratory, University of California at Berkeley, Berkeley, CA

    Schneider, R
    Graduate student, University of California at Berkeley, Berkeley, CA

    Harte, J
    Professorsenior scientist, University of California at BerkeleyLawrence Berkeley Laboratory, Berkeley, CA

    Pages: 14    Published: Jan 1985


    Abstract

    Microcosms designed to simulate the pelagic epilimnion of a lentic freshwater body were compared with the natural system from which they were derived. Emphasis was placed on determining the influence of water agitation on microcosm realism and replicability. In two experiments, excellent tracking of the natural system for 4 to 6 weeks and excellent replication among microcosms was observed; the dominant phytoplankton and zooplankton taxa in the microcosms were not statistically distinguishable from those measured in the natural systems. In a third experiment, the dominant taxa in the 50-L microscosms could be statistically distinguished from the variables in the natural system. In all three experiments, correlations between the taxonomic variables and the chemical variables, when present in the natural system, were observed in the microcosms.

    Keywords:

    aquatic ecosystems, contaminants, microcosms, phytoplankton, nutrients, water agitation, freshwater


    Paper ID: STP35253S

    Committee/Subcommittee: E47.01

    DOI: 10.1520/STP35253S


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