Main Title |
Response of Predatory Zooplankton Populations to the Experimental Acidification of Little Rock Lake, Wisconsin. |
Author |
Sierszen, M. E. ;
Frost, T. M. ;
|
CORP Author |
Environmental Research Lab.-Duluth, MN. ;Wisconsin Univ.-Madison. Center for Limnology.;National Science Foundation, Washington, DC. |
Publisher |
c1993 |
Year Published |
1993 |
Report Number |
EPA/600/J-93/422; |
Stock Number |
PB94-101730 |
Additional Subjects |
Acidification ;
Zooplankton ;
Little Rock Lake ;
Biodeterioration ;
Populations ;
Monitoring ;
pH ;
Concentration(Composition) ;
Tolerances(Physiology) ;
Diptera ;
Invertebrates ;
Response ;
Wisconsin ;
Reprints ;
Chaoborus ;
Phantom midge ;
Predation
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB94-101730 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
12p |
Abstract |
To assess the effects of lake acidification on large predatory zooplankton, the authors monitored population levels of four limnetic taxa for 6 years in a lake with two basins, one of which was experimentally acidified (2 years at each of three levels: pH 5.6, 5.2 and 4.7). Concentrations of phantom midge (Chaoborus spp.), the most abundant large predator, remained similar in the treatment and reference basins until the fourth year (pH 5.2) when they increased in the treatment basin. In contrast, Epischura lacustris and Leptodora kindtii disappeared from limnetic samples, and water mites declined to near zero upon acidification. Treatment basin populations of E. lacustris declined sharply during the second year of acidification. The nature of the decline suggested sensitivity of an early life stage during the first year at pH 5.6. Leptodora kindtii showed no population response at pH 5.6, but declined to essentially zero at pH 5.2. Treatment basin populations of water mites fluctuated until declining in the fifth and sixth years (pH 4.7). These changes indicate a variety of direct and indirect responses to lake acidification. |
Supplementary Notes |
Pub. in Jnl. of Plankton Research, v15 n5 p553-562 May 93. Prepared in cooperation with Wisconsin Univ.-Madison. Center for Limnology. Sponsored by National Science Foundation, Washington, DC. |
NTIS Title Notes |
Journal article. |
Title Annotations |
Reprint: Response of Predatory Zooplankton Populations to the Experimental Acidification of Little Rock Lake, Wisconsin. |
Category Codes |
68D; 48G; 57H; 57Z |
NTIS Prices |
PC A03/MF A01 |
Primary Description |
600/03 |
Document Type |
NT |
Cataloging Source |
NTIS/MT |
Control Number |
332328574 |
Origin |
NTIS |
Type |
CAT |