of plants and animals in a community, brought about by 

 interactions within and between species and by the effects of 

 environmental conditions, cf. Life-cycle, Balance of nature, 

 Pyramid of numbers. 



Biotic Climax 



See Climax. 



Biotic District 



According to Dice a subdivision of a Biotic Province, dis- 

 tinguished by ecologic differences of less importance than 

 those that separate biotic provinces. 



Biotic Environment 



The living parts of the environment of an organism or 

 group of organisms. 



Biotic Equilibrium 



See Biotic balance, Balance of nature. 



Biotic Factor 



Environmental influences caused by plants or animals 

 such as shading by trees or trampling by animals, sometimes 

 used to include effects of non-living organic matter, cf. Bio- 

 logical factor, Coaction. 



Biotic Formation 



See Biome. 



Biotic Influence 



See Biotic factor. 



Biotic Potential 



The inherent capacity of an organism to reproduce and 

 survive, which is pitted against limiting influences of the 

 environment, cf. Reproductive potential, Environmental 

 resistance. 



Biotic Pressure 



The activities of an enlarging population to maintain 



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