AN OUTLINE OF SOME OF THE IMPORTANT PLANT 

 AND ANIMAL ASSOCIATIONS 



Associations Changing Successively as Land Construction Goes on 



The Filling Lake in the Dune Area 



I. 



2. 



4- 



5. 

 6. 



7- 

 8. 



The beach association 

 Fore-dune association 

 Cottonwood association 



Transition zone 

 Pine association 

 Black oak association 

 Mixed oak association 



Oak-hickory association 



Predatory beetle association 



Digger-wasp association 

 Large tiger beetle association 

 Cicindela hirticollis association 

 Ant-lion association 

 Tree frog association 



Green tiger association 

 Wood frog association 



Beech-maple association 



(For the last two see p. 306) 

 The filling pond or small lake leads on to 

 a) the wet prairie and finally to the dry prairie 

 h) the swamp with white ash-elm association, and finally to the cli- 

 max forest 

 c) the sphagnum bog and tamarack swamp. The early stages of 

 these are practically identical, namely (7 is usually wanting in c) 

 Bare bottom association Lampsilis luteolus association 



Chara association Bloodworm association 



Utricularia Myriophyllum association Ischniira vcrticalis association 

 They then differentiate as follows: 



{a) 



10. Water lily association 



11. Bulrush association 



12. Carex-Scirpus diS?>OQ.\aX\on 



13. Swamp grass association 



Painted turtle association 

 Marsh wren association 

 Green flatworm association 

 Bobolink association 



Andropogon furcatus, meadow lark association (see p. 306) 



(b) 



10. Water lily association 



11. Bulrush association 



14. Cat-tail association 



15. Buttonbush-prickly ash association 



305 



Painted turtle association 

 Marsh wren association 

 Redwing association 

 Succinea association 



