Record Display for the EPA National Library Catalog


Main Title Cesium: Potassium Index of Food Web Structure and Biomagnification of Trace Elements in a Polluted Harbor of Southern California.
Author Young, D. R. ; Mearns, A. J. ; Jan, T. K. ;
CORP Author Environmental Research Lab.-Narragansett, Newport, OR. Mark O. Hatfield Marine Science Center. ;National Oceanic and Atmospheric Administration, Seattle, WA. ;Los Angeles Hyperion Treatment Plant, Playa Del Rey, CA.;University of Southern California, Los Angeles. Sea Grant Program.
Publisher c1987
Year Published 1987
Report Number ERLN-N029 ;EPA/600/J-87/496;
Stock Number PB90-126053
Additional Subjects Food chains ; Marine biology ; Water pollution ; Feeding(Supplying) ; Sampling ; Trace elements ; Mercury(Metal) ; Cesium ; Potassium ; Ratios ; Trophic level
Library Call Number Additional Info Location Last
NTIS  PB90-126053 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 6p
A biological technique of quantifying trophic position in marine food webs, and a chemical technique of quantifying 'structure' in feeding relationships and resultant biomagnification potential, were applied to a polluted harbor ecosystem. The chemical index (cesium:potassium ratio) indicated that the food web sampled had a relatively high degree of structure. Nevertheless, of eleven trace elements measured, only mercury tissue concentrations systematically increased with trophic level. This result is consistent with the hypothesis that most pollutant trace elements do not biomagnify in marine food webs.