C-3 



COASTAL ZONE 



Coastal waters and adjacent lands which exert 

 a measurable influence on the uses of the sea 

 and its ecology. The zone extends onshore to 

 the upper reaches of the tidal zone and adjacent 

 shore areas. (See Estuary) 



COLD-BLOODED 

 ANIMALS 



Animals that lack an internal temperature 

 regulating mechanism to offset external 

 temperature changes. Their body temperature 

 fluctuates to a large degree with that of 

 their environment. Examples are fish and 

 aquatic invertebrates . 



COLONY 



A distinguishable localized population within 

 a species . 



COMMUNITY 



An aggregation of organisms within a specified 

 area; all forms of life inhabiting a common 

 environment. 



COMPENSATION 

 LEVEL 



The depth of a waterway at which there is a 

 balance between photosynthesis and respiration . 



COMPETITION 



The effort of two or more individuals or 

 species of a community to utilize some of the 

 same environmental resources. 



COMPETITION No two species can occupy the same niche at 



EXCLUSION PRINCIPLE 

 (Gause's Rule) 



the same time. 



