| 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 |
|
| 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 |
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| 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. |
| Abstract |
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. |
| Notes |
Includes bibliographical references (pages 122-164). |
| Place Published |
Athens, Ga. |
| Corp Au Ser Add Ent |
United States. Enivironmental Protection Agency. EPA publication ; no. 600/3-81-036. |
| NTIS Title Notes |
Final rept. May 78-Sep 80. |
| PUB Date Free Form |
1981 |
| Series Title Untraced |
"EPA 600/3-81-036, Grant no. R805860010" |
| Category Codes |
6T; 6F; 57Y#; 57H; 68D# |
| NTIS Prices |
PC A09/MF A01 |
| Primary Description |
600/01 |
| BIB Level |
m |
| Medium |
unmediated |
| Content |
text |
| Carrier |
volume |
| Cataloging Source |
OCLC/T |
| Control Number |
323799300 |
| OCLC Time Stamp |
20180706111330 |
| Language |
eng |
| Origin |
OCLC |
| Type |
MERGE |
| OCLC Rec Leader |
01432cam 2200349Ia 45010 |
