ACKNOWLEDGMENTS

The following persons contributed to the preparation of this manuscript: Randy Creech prepared the illustrations, Carol Lunney photographically reproduced the figures, Sue Milliams and Margaret Schiller typed preliminary drafts, and Cindy Stack of the Institute for Coastal and Marine Resources typed the final copy.

The cover diagrams were drawn by Ray Moore. An attempt was made to illustrate the effects of phytoplankton turbidity on submersed plant community structure in two otherwise similar areas of eutrophic Little John Lake and oligotrophic Silver Lake in Wisconsin (after Wilson, 1935).