Record Display for the EPA National Library Catalog

RECORD NUMBER: 723 OF 723

OLS Field Name OLS Field Data
Main Title Zooplankton Population Dynamics in Experimentally Toxified Pond Ecosystems.
Author Sierszen, M. E. ; Boslton, H. L. ; Horn., M. J. ;
CORP Author Oak Ridge National Lab., TN.;Department of Energy, Washington, DC.;Environmental Research Lab.-Duluth, MN.
Publisher c1991
Year Published 1991
Report Number ACO5-840R21400; EPA/600/J-92/079;
Stock Number PB92-153352
Additional Subjects Zooplankton ; Water pollution effects(Animals) ; Aquatic ecosystems ; Phenols ; Population dynamics ; Bioassay ; Chlorophyll ; Seasonal variations ; Biomass ; Reprints ;
Holdings
Library Call Number Additional Info Location Last
Modified
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Status
NTIS  PB92-153352 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 08/28/1992
Collation 8p
Abstract
To evaluate ecosystem response to and recovery from toxic contamination, the authors added phenolic compounds to a series of experimental ponds. Toxicants were added repeatedly in a temporally staggered sequence to evaluate the influence of seasonal factors and previous exposure history on the responses to toxicant stress. The authors hypothesized that seasonal changes in ecosystem structure, e.g. shifts in the relative importance of 'to-down' and 'bottom-up controls on energy flow (Bartell et al. 1988), would influence the system-level responses to the toxicant. Information from these experiments is being incorporated into models that predict ecological risk and system-level behavior under toxicant stress. The study focuses on the responses of zooplankton populations to toxicants and factors which may affect the apparent severity of toxic effects.