Abstract Introduction Acknowledgments Methods Results Discussion Conclusions References

ACKNOWLEDGMENTS

Our work has been done in collaboration with colleagues at a number of other agencies, including South Florida Water Management District, National Oceanic and Atmospheric Administration, and Everglades National Park. We would like to thank them for their cooperation and assistance in this investigation. We would especially like to thank William Lyons, Florida Marine Research Institute, for his invaluable and generous help with current molluscan taxonomy, and for the many long discussions on the ecology and biology of Florida Bay molluscs; we have benefited greatly from his contributions. None of this work would have been possible with out the assistance of William Gibbs and the staff at the Keys Marine Laboratory, our base of operations during fieldwork. We are indebted to our colleagues Robert Halley and Eugene Shinn, U. S. Geological Survey, St. Petersburg, FL, for collecting the cores and making them available to us for analysis, and to John Robbins (NOAA) for collaborating on the development of the age model for the cores.

We would like to thank our reviewers Lucy Edwards, U.S. Geological Survey, Reston, VA and John Pojeta, U.S. Geological Survey and U.S. National Museum of Natural History, Washington, D.C. for their thoughtful reviews and suggestions to improve this manuscript. Thomas Scott, and G. Harley Means, Florida Geological Survey, have provided assistance in the field. The following U. S. Geological Survey personnel have assisted in field work and sample preparation: Kristi Alger, Jill D’Ambrosio, Alessandro Bagalia (volunteer), Nancy Carlin, Carey Costello, Lauren Hewitt, Sara Schwede, and Steve Wandrei. Sara Schwede and Luke Blair, USGS, produced the GIS salinity maps.