to coin a new term. It is worth while to make ecological 

 literature intelligible to as wide a field of readers as possible. 

 As concepts and techniques become clearer and more precise 

 new terms are often needed, and when a new word is 

 accepted hi one branch of science it should be accepted in 

 other branches. 



Definitions are not immutable. As knowledge increases 

 the meanings of terms change. It is hoped that this volume 

 will aid in the development of an increasingly useful ecologi- 

 cal terminology. 



A list of references are given below, many of which will 

 be found useful in securing further amplification of the 

 meaning of words in this dictionary. 



