i- 



S 

 o 



CD 



B 



10' 10 



10^ 10' 10' lo'^ iono= 



N, cells/m' 



10^ 10" 10^ 10' 10' 10^ 10^- 10^° 



N, cells/m^ 



P, mg C/m^ per day 



Fig. 2. Relationships of parameters of primary production at the 

 surface of the ocean (after B. V. Konavalov): a, primary production (P) 

 and cell count of phytoplankton (N); b, chlorophyll a_ (CI a) and N; c, 

 CI a_ and P; 1, regression line produced by direct comparison; 2, 

 regression line produced by applying the results of two different 

 graphs; 0, oligotrophic waters; M, merotrophic waters; E, eutrophic 

 waters. 



234 



