Ecocline 



(1) A gradation or Cline (q. v.) in the adaptations of a 

 species that is associated with an environmental gradient, cf. 

 Geocline. (2) A gradation of ecosystems along an environ- 

 mental gradient, comprising both the gradient of natural 

 communities (Coenocline) and the Complex gradient of en- 

 vironmental conditions. 



Ecological Amplitude 



The range of one or more environmental conditions in 

 which an organism or a process can function, cf. Tolerance, 

 Optimum, Pessimum. 



Ecological Bonitation 



The estimate of the numerical abundance of an organism 

 in a locality or a season, cf. Bonitation, Biotic potential. 



Ecological Efficiency 



The ratio between the energy available to one or more 

 organisms or processes and the energy that is actually util- 

 ized. 



Ecological Equilibrium 



See Balance of nature, Dynamic equilibrium. 



Ecological Equivalence 



The situation or condition in which two or more species 

 because of their similarity in Ecological amplitude can oc- 

 cupy the same ecological Niche, thus being able to replace 

 each other. 



Ecological Equivalent 



An organism which participates in Ecological equivalence 

 (q. v.). cf. Vicariation. 



Ecological Factor 



Any part or condition of the environment that influences 

 the life of one or more organisms; often classified into A; 



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