||Relationships among Observed Metal Concentrations, Criteria, and Benthic Community Structural Responses in 15 Streams.
LaPoint, T. W. ;
Melancon, S. M. ;
Morris, M. K. ;
||Environmental Monitoring Systems Lab., Las Vegas, NV.
Aquatic animals ;
Stream pollution ;
Age determination ;
Daphnia magna ;
Pimephales promelas ;
||Some EPA libraries have a fiche copy filed under the call number shown.
||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.
||Pub. in Jnl. of the Water Pollution Control Federation, v56 n9 p1030-1038 Sep 84.
|NTIS Title Notes
||Reprint: Relationships among Observed Metal Concentrations, Criteria, and Benthic Community Structural Responses in 15 Streams.
|PUB Date Free Form
||6C; 6T; 68D; 57Z; 57Y
||PC A02/MF A01