Record Display for the EPA National Library Catalog


Main Title Eutrophication in coastal waters: nitrogen as a controlling factor /
Author Eppley, Richard W.,
Other Authors
Author Title of a Work
Eppley, Richard W.
CORP Author University of California (System). Institute of Marine Resources.
Publisher United States Environmental Protection Agency, Water Quality Office,
Year Published 1971
Report Number W7210611; EPA 620/R-71-027
OCLC Number 00348147
Subjects Eutrophication--California--Santa Catalina, Gulf of ; Phytoplankton--California--Santa Catalina, Gulf of ; Plants--Effect of nitrogen on ; Pacific Ocean--Gulf of Santa Catalina
Additional Subjects Eutrophication--California--Santa Catalina, Gulf of ; Phytoplankton--California--Santa Catalina, Gulf of ; Plants, Effect of nitrogen on
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJAM WTD QH96.8.E9C34 Wetlands Collection Region 3 Library/Philadelphia, PA 04/23/1999
EJBD ARCHIVE EPA 620-R-71-027 Headquarters Library/Washington,DC 07/05/2011
EJBD  EPA 620-R-71-027 Headquarters Library/Washington,DC 05/02/2014
EKCM  QH96.8.E9C34 CEMM/GEMMD Library/Gulf Breeze,FL 01/11/1991
ELBD RPS EPA 620-R-71-027 repository copy AWBERC Library/Cincinnati,OH 09/27/2017
ERAD  EPA 620/R-71-027 Region 9 Library/San Francisco,CA 09/26/2013
Collation ix, 67 pages : illustrations, figures, tables ; 28 cm
Includes bibliographical references (pages 61-67).
Contents Notes
The Southern California coastal sewage outfalls were investigated in relation to their effect upon standing stocks of phytoplankton, and on primary production. Kinetic parameters for the assimilation of ammonium, nitrate, and urea were determined at the outfall sites using N-15 labeled substrates. Laboratory studies investigated the utilization of various forms of nitrogen by phytoplankton, mechanisms and rates of nitrogen assimilation, and enzymes of nitrogen assimilation. It was found that the maximum growth rate was a variable, while the saturation constant was uniform over a range of dilution rates of N-limited chemostat cultures. The chemical composition of phytoplankton varied with dilution rate in reproducible ways. By varying the dilution rate of such cultures one seems to regulate the degree of nitrogen-deficiency of the phytoplankton.