Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Effects of Complex Effluents from the River Raisin on Zooplankton Grazing in Lake Erie.
Author McNaught, D. C. ; Bridgham, S. D. ; Meadows, C. ;
CORP Author Minnesota Univ., Minneapolis. Dept. of Ecology and Behavioral Biology. ;Duke Univ., Durham, NC. School of Forestry and Environmental Studies.;Environmental Research Lab.-Duluth, MN.
Publisher c1988
Year Published 1988
Report Number EPA/600/D-89/237;
Stock Number PB90-134453
Additional Subjects Zooplankton ; Toxicity ; Lake Erie ; Water pollution ; Tests ; Daphnia ; Inhibition ; Detritus ; Concentration(Composition) ; Metals ; Reprints ; Chemicals ; Ecosystems
Library Call Number Additional Info Location Last
NTIS  PB90-134453 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/15/1990
Collation 13p
Functional ecosystem tests should reflect the hazards of toxic chemicals, as well as stimulation by nutrients, by measuring a single flux of phytoplankton to the dominant members of the community. The flux of phytoplankton and detritus to zooplankton is reflected by the filtering rates of individual organisms, expressed as millilitres per animal per hour. The authors used common particle counting techniques to measure such fluxes in the waters of Lake Erie. They then examined the impact of complex effluents on the filtering rates. These effluent effects are scored as inhibition or stimulation of filtering by the dominant herbivores in the Lake Erie ecosystem. In the River Raisin, a tributary to Lake Erie, specific effluents usually inhibited grazing by the herbivores Daphnia. Diaptomus, and Cyclops, although one effluent was stimulatory. These results were directionally consistent and probably depended on the characteristics (especially the concentrations of metals) of the effluents.