Closed Community 



A Community in which the Niches are so well occupied 

 by organisms that invasion by other organisms is difficult or 

 impossible. 



Closed Society 



A Society (q. v.) in which strangers are rarely admitted, 

 e.g., many kinds of insect societies including bees. 



Cloudburst 



A sudden and extremely heavy downpour of rain, espe- 

 cially in mountainous regions. 



Cloud Forest 



A forest occupying the parts of mountainous regions 

 where cloudiness or moisture condensation occurs regularly, 

 e.g., laurel forest in the Canary Islands. 



Cloud Seeding 



The placing of materials such as silver iodide in the 

 clouds to produce precipitation. 



Clutch 



The aggregate of eggs or the young of birds. 



Coaction 



An Interaction (q. v.) among organisms, e.g., Competi- 

 tion, Cooperation, Symbiosis. 



Coadaptation 



The correlated modification of two or more mutually 

 dependent organs or organisms, e.g., the structure of a 

 flower and the proboscis of an insect. 



Coastal Plain 



A plain between the sea and higher land, usually at a 

 low altitude. 



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