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Science 29 July 1983:
Vol. 221. no. 4609, pp. 457 - 459
DOI: 10.1126/science.221.4609.457
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Articles

Lessons from the Silica "Decline" in Lake Michigan

JOSEPH SHAPIRO 1 and EDWARD B. SWAIN 1

1 Limnological Research Center, University of Minnesota, Minneapolis 55455

A new analysis of data obtained from water treatment plants on Lake Michigan fails to support published contentions, based on such data, that the silica content of the lake has declined during the last five decades. The purported silica decline appears to have been due to changes in analytical methods and laboratories. Had such changes been avoided, an invaluable record of the silica content of the lake could have been obtained.

Submitted on September 21, 1982
Revised on February 28, 1983


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Early Eutrophication in the Lower Great Lakes:.
C. L. SCHELSKE, E. F. STOERMER, D. J. CONLEY, J. A. ROBBINS, and R. M. GLOVER (1983)
Science 222, 320-322
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