Dictionary of 

 Ecology 



by HERBERT C. HANSON 



This practical dictionary is for the use 

 of students, teachers, and investigators 

 in ecology and related fields such as 

 range management, forestry, wildlife, 

 conservation, agronomy, and limnology. 

 It is also designed for use by the general 

 public for the better understanding of 

 widely used ecological terms. The Dic- 

 tionary includes not only strictly ecologi- 

 cal terms but also those that have been 

 adopted from related fields. The aim is 

 not to define words with final fixity but 

 rather to give clear, concise statements 

 indicating present-day usage. The defi- 

 nitions will be useful, not only in facili- 

 tating the comprehension of ecological 

 concepts, but also in furthering the re- 

 finement of both concepts and defini- 

 tions. 



The author is Plant Ecologist, Ber- 

 thoud, Colo., formerly Research Profes- 

 sor, Dept. of Biology, The Catholic 

 University of America. 



A JH 



