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PREFACE 



This Glossary is intended to provide familiarity and under- 

 standing of technical terminology specific to the discipline of 

 aquatic ecology and will serve as a convenient reference for all 

 professionally trained persons concerned with water pollution control. 



Definitions have been carefully reviewed to assure accord with 

 current professional usuage. Appreciation is tendered to biologists 

 of the following Environmental Protection Agency activities for 

 this service: Robert S. Kerr Water Research Center, Ada, Oklahoma; 

 National Field Investigations Center, National Training Center, 

 Analytical Quality Control Laboratory, Cincinnati, Ohio; National 

 Water Quality Laboratory, Duluth, Minnesota; National Marine Water 

 Quality Laboratory, West Kingston, Rhode Island. 



Terms specifically identifying or describing organisms have 

 generally been excluded from this work. For this information the 

 reader is referred to the selected references presented in the 

 appendix. Glossaries of terminology related to other disciplines 

 concerned with water pollution control are also listed in the 

 appendix. 



Terms underscored in a definition are separately defined 

 in this Glossary. Where appropriate, closely associated or 



related terms are cited parenthetically, (See ), following 



the definition. Specific synonyms are noted, in parentheses, 

 with the listed word. 



John E, Matthews 



