Record Display for the EPA National Library Catalog


Main Title Microcosms as test systems for the ecological effects of toxic substances : an appraisal with cadmium /
Author Hendrix, Paul F. ; Langner, Christine L. ; Odum, Eugene P. ; Thomas, Carolyn L. ;
Other Authors
Author Title of a Work
Brockway, Donald.
CORP Author Georgia Univ., Athens. Inst. of Ecology.;Environmental Research Lab., Athens, GA.
Publisher U.S. Environmental Protection Agency, Environmental Research Laboratory, Office of Research and Development,
Year Published 1981
Report Number EPA 600-3-81-036; EPA-R-805860
Stock Number PB81-209595
OCLC Number 08290383
Subjects Poisons
Additional Subjects Cadmium ; Toxicology ; Water pollution ; Aquatic microbiology ; Screening ; Microorganisms ; Nutrients ; Metals ; Toxic substances ; Bioindicators ; Water pollution effects(Animals) ; Ecosystems ; Microcosms ; NTISEPAORD
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD  EPA 600-3-81-036 Headquarters Library/Washington,DC 11/01/2018
EKCD  EPA-600/3-81-036 CEMM/GEMMD Library/Gulf Breeze,FL 07/10/2018
ELBD ARCHIVE EPA 600-3-81-036 Received from HQ AWBERC Library/Cincinnati,OH 10/04/2023
NTIS  PB81-209595 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation xiii, 171 pages : illustrations ; 28 cm.
A two-phase set of experiments was conducted to address some of the problems inherent in ecological screening of toxic substances in aquatic microcosms. Phase I was a 4 x 4 factorial experiment (four levels of cadmium versus four levels of nutrient enrichment) on the interactive effects of cadmium and nutrients using static microcosms. Phase II was a 2 x 4 factorial experiment (continuous and pulsed cadmium inputs versus phosphorus limited and non-limited inputs) using flowthrough microcosms to study temporal aspects of system behavior in response to nutrient limitation and chronic versus acute cadmium perturbations. Generally, as cadmium concentration increased, parameters changed to indicate more system stress, except that high nutrient levels reduced somewhat the stress effect of cadmium. Of the variables measured, community metabolism, community composition by trophic groups, and output/input ratios for NO3-N, MN and Fe provided the best indicators of system response to cadmium. Nutrient enrichment and phosphorus limitation significantly influenced cadmium effects on most of the variables studied. Pulsed cadmium early in succession significantly affected system response to cadmium pulses later in succession. A bibliography of microcosm literature is included.
Includes bibliographical references (pages 122-164).