||Abundance Patterns of Diatoms on 'Cladophora' in Lake Huron with Respect to a Point Source of Wastewater Treatment Plant Effluent.
Stevenson, R. Jan ;
Stoermer, E. F. ;
||Michigan Univ., Ann Arbor. Great Lakes Research Div.;Environmental Sciences Research Lab., Research Triangle Park, NC.
Water pollution ;
Lake Huron ;
Sewage disposal ;
Mathematical models ;
Point sources ;
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Epiphytic diatoms on Cladophora were collected from July to September, 1979, at various distances from a point source of municipal wastewater treatment effluent to Lake Huron. Diatom accumulation rates were positively related to distance from the point source. Despite higher nutrient concentrations nearest the point source, low accumulation rates of Cladophora-epiphyte assemblage biomass and epiphytic diatoms indicated moderate growth inhibition by an undetermined factor. Evaluation of epiphytic diatom population abundance and ecology plus diatom taxocene species diversity supported our conclusions. A curvilinear relationship between diatom species diversity and impacts of growth inhibition is proposed and discussed. (Copyright (c) Internat. Assoc. Great Lakes Res., 1982.)