INTERRELATIONS 67 



influences this, and is itself again modified to correspond. In succes- 

 sion, functional activity rises to an optimum until temporary stabiliza- 

 tion is attained in each stage, when it falls off until a new wave of 

 invasion culminates in the succeeding stage. A detailed and compre- 

 hensive account of the various community functions is impossible 

 within the scope of the present book, but the salient features of the 

 major processes, their interrelations, and the significance of each for 

 climax and sere are discussed in Chapters 3 to 6, inclusive. 



