THE CLASSIFICATION OF COMMUNITIES 



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upon habitat; Communities strictly related to a certain habitat show a greater 

 interdependence of species than free-floating communities or unstable or acci- 

 dental rooted communities. 



2. The presence of interdependence between the members of the community. 

 Communities whose union is mere proximity are more simply organized than 

 those with sharp competition between species and individuals. Open communities 

 are generally simpler than closed. 



