ACKNOWLEDGEMENTS 



This research was partially supported by a cooperative agreement 

 with United States Department of Agriculture, ARS Number 58-7B30-0-177. 

 The grant was administered as a project of the University of Florida, 

 Institute of Food and Agricultural Sciences, Center for Aquatic Weeds. 



I am extremely grateful to Dr. William T. Haller, my major 

 professor, for his advice and encouragement throughout this study. 

 Appreciation is also extended to the members of my committee: Dr. Daniel 

 E. Canfield, Jr.; Dr. Leon A. Garrard; Dr. Jerome V. Shireman; and 

 Dr. Shirlie H. West; and to a former committee member, Dr. Thai K. Van, 

 for their interest and constructive criticisms. 



I also wish to express my thanks to Dr. Palakurthi Suresh C. Rao for 

 the use of his carbon oxidizer without which a major portion of this 

 study would not have been possible. Similarly, I would like to thank 

 Dr. George Bowes for the use of his scintillation counter. 



My sincere thanks are extended to the U.S. Army Corps of Engineers, 

 Jacksonville District, who afforded me with the opportunity and finan- 

 cial support to pursue this degree. In particular, I would like to 

 thank my supervisors, Mr. Gail G. Gren, Mr. Girlamo DiChiara, and 

 Mr. James D. Hilton and the members of the Natural Resource Management 

 Section, James M Dupes, James T. McGehee, and Larry T. Taylor for their 

 patience and support. I want to thank Eddie Knight for his assistance in 

 conducting the field portion of this study and to Betty Hyman and 

 Jerrine Hamm for their assistance in preparing this manuscript. 



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