that influences another animal; the reciprocal interactions 

 of two or more animals. 



Social Dominance 



The behaviour pattern in which one or more animals 

 dominate other individuals in the group, cf. Peck-dominance. 



Social Facilitation. 



See Facilitation, social. 



Social Hierarchy 



See Hierarchy. 



Sociation 



A vegetation type characterized by Dominant species in 

 the various strata; a subdivision of the Association (4) (q. v.) 

 in the Scandinavian School of Phytosociology. 



Socles 



According to F. E. Clements a group of one or more 

 kinds of subdominant plants in a stage of Succession preced- 

 ing the Climax, cf. Associes, Society. 



Society 



(1) A social group of individuals of one species which 

 cooperate in their activities. (2) According to F. E. Clements 

 a group of subdominant plants in Climax vegetation, cf. 

 Association, Socies. 



Sociology 



The study of the development, composition, character- 

 istics, and interactions of groups of organisms or communi- 

 ties, cf. Plant sociology. Ecology. 



Sod 



A surface layer of soil matted or bound together by 

 roots and rhizomes of grasses and other herbs, especially by 

 Sod grasses. 



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