Record Display for the EPA National Library Catalog


Main Title Chemical and Biological Status of Lakes and Streams in the Upper Midwest: Assessment of Acidic Deposition Effects.
Author Wiener, J. G. ; Eilers, J. M. ;
CORP Author Fish and Wildlife Service, Columbia, MO. ;Northrop Services, Inc., Corvallis, OR.;Corvallis Environmental Research Lab., OR.
Publisher 1987
Year Published 1987
Report Number EPA/600/D-88/271;
Stock Number PB89-132716
Additional Subjects Lakes ; Streams ; Aquatic biology ; Acidification ; Surface waters ; Fisheries ; Sediments ; pH ; Air pollution ; Water pollution ; Chemical properties ; Minnesota ; Wisconsin ; Michigan ; Tables(Data) ; Reprints ; Water pollution effects(Animals) ; Air-water interactions ; Acid rain
Library Call Number Additional Info Location Last
NTIS  PB89-132716 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 17p
Many lakes in three areas in the Upper Midwest--northeastern Minnesota, northern Wisconsin, and the Upper Peninsula of Michigan--have low acid neutralizing capacity (ANC) and may be susceptible to change by acidic deposition. These acidic lakes are precipitation-dominated, clearwater seepage lakes having small surface area, shallow depth, and low concentrations of dissolved organic carbon. The spatial distribution of these acidic lakes parallels a west to east gradient of increasing sulfate and hydrogen ion deposition. Several of these acidic lakes exhibit chemical characteristics and biological changes consistent with those observed elsewhere in waters reported to be acidified by acidic deposition. Streams in this three-state region have high ANC and appear to be insensitive to acidic deposition. The species richness and composition of lacustrine fish communities in the region are partly related to pH and associated chemical factors. Sport fishes considered acid-sensitive and of primary concern with regard to acidification include walleye, smallmouth bass, and black crappie. The fishery in at least one lake, Morgan Lake in Wisconsin (pH 4.6), may have declined because of acidification. Given the general lack of quantitative fishery data for acidic Wisconsin and Michigan lakes, however, more general conclusions concerning impacts or the absence of impacts of acidification on the region's fishery resources are not possible.