PLANKTON OF LAKES WAVBESA AND KEGONSA 



125 



cooo 



S600 



S200 



-4000 



4^00 



-4000 



^600 



3200 



£QOO 



2400 



£000 



iGOO 



1200 



eoo 



^400 



Fig. 39. — The quantity of dry organic matter in the net plankton, in the nanno- 

 plankton and in the total plankton of Lake Waubesa in 1916. Curve A 

 represents the net plankton, curve B the nannoplankton and curve C the 

 total plankton. The amounts are indicated in milligrams per cubic meter 

 of water. See tables 47 and 48. 



