Eutrophication of the St. Lawrence Great Lakes

Limnology and Oceanography



Lakes Huron, Michigan, and Superior are classified as oligotrophic lakes on the basis of their biological, chemical, and physical characteristics. Lake Ontario, although rich in nutrients, is morphometrically oligotrophic or mesotrophic because of its large area of deep water. Lake Erie, the most productive of the lakes and the shallowest, is eutrophic. Several changes commonly associated with eutrophication in small lakes have been observed in the Great Lakes. These changes apparently reflect accelerated eutrophication in the Great Lakes due to man's activity. Chemical data compiled from a number of sources, dating as early as 1854, indicate a progressive increase in the concentrations of various major ions and total dissolved solids in all of the lakes except Lake Superior. The plankton has changed somewhat in Lake Michigan and the plankton, benthos, and fish populations of Lake Erie are greatly different today from those of the past. An extensive area of hypolimnetic water of Lake Erie has developed low dissolved oxygen concentrations in late summer within recent years.

Publication type Article
Publication Subtype Journal Article
Title Eutrophication of the St. Lawrence Great Lakes
Series title Limnology and Oceanography
DOI 10.4319/lo.1965.10.2.0240
Volume 10
Issue 2
Year Published 1965
Language English
Publisher Wiley
Contributing office(s) Great Lakes Science Center
Description 15 p.
First page 240
Last page 254
Online Only (Y/N) N
Additional Online Files (Y/N) N
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