Record Display for the EPA National Library Catalog


Main Title Relationships among Observed Metal Concentrations, Criteria, and Benthic Community Structural Responses in 15 Streams.
Author LaPoint, T. W. ; Melancon, S. M. ; Morris, M. K. ;
CORP Author Environmental Monitoring Systems Lab., Las Vegas, NV.
Year Published 1984
Report Number EPA/600/J-84/287;
Stock Number PB85-198265
Additional Subjects Metals ; Aquatic animals ; Toxicity ; Stream pollution ; Daphnia ; Crustacea ; Age determination ; Populations ; Reprints ; Ecosystems ; Daphnia magna ; Pimephales promelas ; Salmo
Library Call Number Additional Info Location Last
NTIS  PB85-198265 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 13p
Water quality criteria for toxic substances published by the U.S. Environmental Protection Agency (EPA) are established to protect aquatic life and human health. An aquatic life criterion specifies the concentration of metal, pesticide, or other toxicant below which ecosystem integrity is maintained. However, most criteria are based on toxicity evidence from only a few sensitive aquatic species, such as Daphnia magna, Pimephales promelas, and Salmo spp. Single-species tests usually use organisms of uniform age and size and therefore lack the heterogeneous responses of a natural population. Other factors that affect the natural ecosystem balance are not necessarily reproduced in the laboratory, such as nutrition, physiological interaction, substrate, current, and light.