Main Title |
Effects of Chlorpyrios on Macroinvertebrates in Littoral Enclosures. |
Author |
Jensen, D. A. ;
Brazner, J. C. ;
|
CORP Author |
Environmental Research Lab.-Duluth, MN. ;Wisconsin Univ.-Superior. |
Year Published |
1987 |
Report Number |
EPA/600/D-87/336; |
Stock Number |
PB88-132238 |
Additional Subjects |
Culcidae ;
Invertebrates ;
Insecticides ;
Toxicity ;
Concentration(Composition) ;
Diptera ;
Populations ;
Worms ;
Exposure ;
Bioassay ;
Pesticides ;
Clams ;
Ponds ;
Chloropyrifos ;
Ecosystems
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB88-132238 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
14p |
Abstract |
Aquatic enclosures constructed in the littoral zone of a 0.72 ha pond in central Minnesota, were used to evaluate the impact of a mosquito larvicide chlorpyrifos on endemic macroinvertebrate communities. Chlorpyrifos was acutely toxic to several macroinvertebrates at a peak concentration of 17.3 micrograms/l. Midge (Chironomidae), mayfly (Caenis sp.) caddisfly (Leptocerus americanus) and damselfly (Enallagma hageni) populations were reduced or eliminated after application. However, oligochaete, snail, ostracod and clam populations increased in the treatment enclosure by the end of the experiment. The littoral enclosure design proved to be an effective technique for evaluating primary (acute) effects of a pesticide on a natural pond ecosystem, and should be readily adaptable to more complex experimental designs requiring replication of experimental units and longer-term studies. |
Supplementary Notes |
Prepared in cooperation with Wisconsin Univ.-Superior. |
PUB Date Free Form |
Nov 87 |
Category Codes |
57P; 57Y |
NTIS Prices |
PC A03/MF A01 |
Primary Description |
600/03 |
Document Type |
NT |
Cataloging Source |
NTIS/MT |
Control Number |
805618701 |
Origin |
NTIS |
Type |
CAT |