Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Modifications of models predicting trophic state of lakes : adjustment of models to account for the biological manifestations of nutrients /
Author Hern, S. C. ; Lambou, V. W. ; Williams, L. R. ; Taylor, W. D.
Other Authors
Author Title of a Work
Hern, S. C.
CORP Author Environmental Monitoring Systems Lab., Las Vegas, NV.
Publisher U.S. EPA, Office of Research and Development, Environmental Monitoring Systems Laboratory ; Available from NTIS,
Year Published 1981
Report Number EPA 600-3-81-001
Stock Number PB81-144362
OCLC Number 07519163
Subjects Phytoplankton--United States. ; Water quality--United States. ; Lake ecology. ; Eutrophication--United States.
Additional Subjects Water pollution ; Lakes ; Chlorophylls ; Phosphorus ; Nitrogen ; Phytoplankton ; Light(Visible radiation) ; Ratios ; Mathematical models ; Classifications ; Eutrophication ; Trophic level
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD ARCHIVE EPA 600-3-81-001 Headquarters Library/Washington,DC 04/18/2018
NTIS  PB81-144362 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 01/01/1988
Collation ix, 38 pages : illustrations, maps ; 28 cm
The strong relationship between total phosphorus and phytoplankton biomass in lakes has been clearly confirmed. What is presently needed in order to predict algal biomass for management decisions on individual lakes is a quantitative understanding of the range in biomass (as measured by chlorophyll a) per unit of phosphorus which extends over order of magnitude. Data collected from lakes were analyzed determining the environmental factors affecting the response of phytoplankton chlorophyll a to total phosphorus. It was found that light attenuation from other than non-chlorophyll a related interferences can dramatically affect the quantity of phytoplankton biomass in many U.S. lakes. It was found that many U.S. lakes would be classified lower (i.e., less eutrophic) if chlorophyll a was used as the trophic classification criteria rather than total phosphorus.
"EPA 600-3-81-001." "January 1981." "PB81-144362." Cover title. Interagency Agreement No. EPA-IAG-78-X0393. Includes bibliographical references (pages 36-38).