Main Title |
Assessment of Historical Change in Two Northern Minnesota Lakes. |
Author |
Hargis, J. R. ;
Shannon, L. J. ;
|
CORP Author |
Minnesota Univ.-Duluth. Dept. of Biology.;Environmental Research Lab.-Duluth, MN. |
Year Published |
1984 |
Report Number |
EPA/600/J-84/290; |
Stock Number |
PB85-198398 |
Additional Subjects |
Ecology ;
Acidity ;
Precipitation(Meteorology) ;
Water pollution ;
Lakes ;
Electric power plants ;
Inorganic sulfates ;
Zooplankton ;
Tolerances(Physiology) ;
Clarity ;
Limnology ;
Minnesota ;
Reprints ;
Acid precipitation
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB85-198398 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
8p |
Abstract |
Two northern Minnesota lakes that had been studied in detail 22 years earlier (1958) were restudied to determine the extent of alteration in ecological conditions. Approximately one year after the original investigation, a coal-fired power plant, which incremented sulfate loading by about 6 kg/ha-yr, began operation nine miles away. These lakes lie within a region judged susceptible to acidic precipitation, though each lake, based on its buffering capacity, would be judged only moderately sensitive. In spite of the influence of this plant and other anthropogenic inputs, the change in lake ecology was apparently minimal. Water clarity decreased in both lakes and some alteration in zooplankton community structure was observed. The long-term utility of lake surveys depends upon how carefully and completely conditions can be reconstructed from records and reports. (Copyright (c) 1984 Springer-Verlag New York Inc.) |
Availability Notes |
Pub. in Environmental Management 8, n6 p481-487 1984. |
Title Annotations |
Reprint: Assessment of Historical Change in Two Northern Minnesota Lakes, |
PUB Date Free Form |
c1984 |
Category Codes |
8H; 6F; 10B; 68D; 68A; 48G; 57H; 97R |
NTIS Prices |
Not available NTIS |
Primary Description |
600/03 |
Document Type |
NT |
Cataloging Source |
NTIS/MT |
Control Number |
519925528 |
Origin |
NTIS |
Type |
CAT |