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59 





f » 



E 



o 



•mm 



o 

 c 





CO 



B 

 O 



u 



c 

 o 



U 



6- 



5- 



4- 



3- 



-H 2- 



1- 



r = 0.52 



20 



Figure 6. 



40 60 



TSI(AVG) 



80 



100 



Concentration of planktonic 

 diatoms in surface sediments 

 versus TSK AVG) for 29 lakes. 



