LAKE ERIE 



BLUE 6REEN AL6AE 

 Ute. 2-19.1929 



esuwx , 

 BOTTOM 

 JULT 2-15.1929 



• 



STATUTE MILES 



«l*00' 



• tfoo" 



T»'oo' 



LAKE ERIE 



BLUE GREEN AL6AE 



AUG 3-20. 1929 



SURfACE 

 BOTTOM 



SEPT 3-19, 1929 



««»'« . NOME 

 BOTTOM 



MILES 



Figure 48. --Distribution of blue -green algae during the sunimer of 1929. 

 Aphanizomenon was abundant during June in the west; in 

 August Anabaena thrived in the east; and in September 

 Coelosphaerium and Merismopedia were plentiful in the west. 



134 



