C-2 



CHRONIC TOXICITY 



Toxicity , marked by a long duration, that 

 produces an adverse effect on organisms. The 

 end result of chronic toxicity can be death 

 although the usual effects are sublethal; e.g., 

 inhibits reproduction, reduces growth, etc. 

 These effects are reflected by changes in the 

 productivity and population structure of the 

 community . (See Acute Toxicity) 



CLASSIFICATION 



The placing of organisms into groups (or 

 categories) according to established scientific 

 requirements. (See Taxonomy) 



CLEAN WATER 

 ASSOCIATION 



An association of organisms found in any 

 natural, unpolluted environment . These 

 associations are characterized by the presence 

 of species that are sensitive to environmental 

 changes caused by Introduction of pollutants. 

 In many cases the presence of a wide variety 

 of species with relatively few individuals 

 representing any one of them is also a 

 characteristic. (See Sensitive Organisms , 

 Tolerant Association) 



COASTAL PLAIN 



A plain between the sea and higher land, 

 usually at a low elevation. 



COASTAL WATERS 



Those waters surrounding the continent which 

 exert a measurable influence on uses of the 

 land and on its ecology . The Great Lakes 

 and the waters to the edge of the continental 

 shelf. 



