254 



Origin of Biomes and Succession 



Tsuqo 

 heterophyllo 



Fogus 



qrandifolio 



Aesculus 

 octondro 



_ VT'y'/'y'^^J j . 1 J , , . ■_ 



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Tilia 

 heterophyllo - 



Acer 

 spicotum - 



Acer 

 socchorum - 



Betulo 

 olleqheniensis — 





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Holesio 

 monticolo 



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Acer 

 pennsylvonicQ - 



Ouercus 

 boreolis - 



Acer 

 rubrum — 



Nysso 

 sylvotico — 



Oxydendrum 

 orboreum — 



Costoneo 

 denloto* — 



Quercus 

 olbo — 



Robinio 

 pseudoococio — 



Quercus 



prinus — 



PInus 

 rigido — 



Pinus 

 pungens — 



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12 3 4 5 6 7 



Sampling stations 



9 10 M 12 



Fig. 112. Histograms showing the relative abundance of the more important 

 trees in the forest communities of the Great Smokey Mountains. * This species 

 now absent from area. (Adapted from Whittaker. ) 



of these two dominants plus an even more abundant third dominant, 

 the white oak Quercus alha. Stations 8 and 10 are more nearly 

 equal mixtures of five or six species. If the condition in any one 

 station covered a considerable area, it would be idcntifial^le as a 

 forest type comparable to one of those plotted in Fig. 110. Each 



