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Science 21 October 1983:
Vol. 222. no. 4621, pp. 320 - 322
DOI: 10.1126/science.222.4621.320
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Articles

Early Eutrophication in the Lower Great Lakes:

CLAIRE L. SCHELSKE 1, EUGENE F. STOERMER 2, DANIEL J. CONLEY 3, JOHN A. ROBBINS 4, and REBECCA M. GLOVER 5

1 Great Lakes Research Division and Department of Atmospheric and Oceanic Science, University of Michigan, Ann Arbor 48109
2 Great Lakes Research Division, University of Michigan
3 Great Lakes Research Division and Department of Atmospheric and Oceanic Science, University of Michigan
4 Great Lakes Environmental Research Laboratory, National Oceanic and Atmospheric Administration, Ann Arbor 48104
5 Department of Atmospheric and Oceanic Science, University of Michigan

New Evidence from Biogenic Silica in Sediments New evidence from studies of biogenic silica and diatoms in sediment cores indicates that eutrophication in the lower Great Lakes resulted from nutrient enrichment associated with early settlement and forest clearance. Diatom production peaked from 1820 to 1850 in Lake Ontario, at about 1880 in Lake Erie, but not until 1970 in Lake Michigan. This is the first reported sediment record of the silica-depletion sequence for the Great Lakes.

Submitted on March 28, 1983
Revised on August 5, 1983


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Palaeoecological evidence for environmental change during the last 200 years. II. Chemical data.
A. M. Mannion and A.M. Mannion (1989)
Progress in Physical Geography 13, 192-215
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