Record Display for the EPA National Library Catalog


Main Title Effect of Secondary Effluents on Eutrophication in Las Vegas Bay, Lake Mead, Nevada.
Author Greene, J. C. ; Miller, W. E. ; Merwin, E. ;
CORP Author Corvallis Environmental Research Lab., OR.
Year Published 1986
Report Number EPA/600/J-86/406;
Stock Number PB88-107057
Additional Subjects Phosphorus ; Water pollution ; Lake Mead ; Las Vegas Bay ; Sampling ; Nutrients ; Metals ; Nitrogen ; Algae ; Biomass ; Phosphorus inorganic acids ; Nitrogen inorganic compounds ; Concentration(Composition) ; Bioassay ; Biological productivity ; Sewage disposal ; Chemical analysis ; Reprints ; Eutrophication ; Heavy metals
Library Call Number Additional Info Location Last
NTIS  PB88-107057 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 14p
The eutrophication potential of Lake Mead, with primary emphasis on Las Vegas Bay, was determined with Selenastrum capricornutum. Nutrient limitation profiles were determined for three sampling stations in Las Vegas Bay and one in Boulder Basin. After heavy metals were chelated with EDTA, P was identified as the primary limiting nutrient with N the secondary limiting nutrient for S. capricornutum. Productivity potential was highest in upper Las Vegas Bay near the sewage inflow. Toward the mouth of the bay and in Boulder Basin, progressively lower potentials were defined. Productivity potential could not be predicted from the filtered samples because the nutrients bound up in the indigenous biomass remained on the filters. Autoclaving followed by filtration prior to assay enabled S. capricornutum to produce yields relative to the productivity observed in the lake.