TABLE OF CONTENTS 



Page 



ACKNOWLEDGMENTS ii 



ABSTRACT vi 



CHAPTER 



1 INTRODUCTION 1 



The Concept of Trophic State in Lakes 1 



Macrophytes and the Lake Ecosystem 4 



The Relationship of Macrophytes With Epiphyton 1 1 



Methods for Reconstructing Historical Macrophyte 



Communities 1 5 



Diatom Methods in Paleolimnology 1 6 



Effects of Spatial Variation on Diatom Assemblages 2 7 



Purpose 2 9 



2 METHODS 3 2 



Collection of Sediment Samples 3 2 



Laboratory Analyses 3 3 



Quantifying Macrophyte Presence 3 6 



Water Chemistry Data 3 8 



Statistical Analyses 3 8 



3 RESULTS 4 3 



Results of Cluster Analyses 6 1 



Results of Principal Components Analyses 6 8 



Results of Stepwise Multiple Regression 7 6 



Results of Canonical Correspondence Analyses 8 3 



A New Predictive Model for Water-Column Total P 8 5 



Assessing Confoundedness in the Water-Column Total 



P Predictive Model 8 8 



IV 



- ^vV 



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