ACKNOWLEDGMENTS 



To be successful, a symposium requires the enthusiasm 

 and unselfish assistance of numerous individuals. The 

 major portion of effort necessary to make this particular 

 meeting an outstanding one came from the staff and 

 students of the Savannah River Ecology Laboratory. 

 Contributions of time and work were given by all 

 individuals at SREL prior to, during, and in the 

 follow-up aspects of the symposium. We also appreciate 

 the cooperative spirit of the Department of Energy's 

 Savannah River Operations Office, without whose sup- 

 port this meeting could not have been held. In addition, 

 we thank the individuals at DOE Headquarters for their 

 encouragement. We especially thank the six invited 

 speakers and numerous session chairmen for their 

 participation in the program. 



We feel a particular indebtedness to Eleanor Cato 

 for her constant vigil to ensure attention to all details 

 and her persistence in carrying out the plethora of jobs 

 related to the symposium and to the publication of this 

 volume. We thank Robert I. Nestor for his handling of 

 the innumerable routine, but critical, exigencies that 

 arise before and during a symposium. Once again we 

 thank the highly competent redactory editorial staff of 

 the DOE Technical Information Center in Oak Ridge, 

 Tennessee. Dee Jared, Anne Goulden, and their associ- 

 ates successfully carried the total volume through to 

 completion. 



Finally, we are particularly grateful to those who 

 assisted in the intensive review process through which all 

 papers passed. We feel that many authors in the volume 



