PARSONS, STEPHENS, and TAKAHASHI: LAKE FERTILIZATION. I. 



Dinobryon 



(100%= 20 4 

 cells /ml) 



Cy dote II a 

 (100% = 8 80 cells/ml) 



Nannochloris 



(100% =3880 cells/ml) 



Months 



M onths 



Figure 9.— Principal phytoplankton species at Station 1 (•), Station 2 (A), Station 3 (O) during 1970. 



19 



