E 



Figure 4-7. Antagonistic effects of iron and copper on 



the growth rate of Pyramimonas 1 in artificial seawater medium 



with the usual supplements of F/2 medium except for EDTA 



which is not added. 



Note: Experiments 1, 2, and 3 represent inocula from different cultures. 

 "Fresh" iron is FeCl3 solution prepared the day of the experiment and 

 sterilized by filtration. 



52 



