1,200 J, 



E 1,000 - 



^ 400 - 



02. 0.4 0.6 O.S 



<l5/tin ScOa (g l-') 



Figure 7. The effect of increasing concentra- 

 tions of silicon dioxide (all parti- 

 cles <15 micrometers) on carbon 

 assimilation of Nannoahloris sp. 



1,750 p 



0.2 0.4 0.6 03 

 <IS/l.inSl02 (G L-<] 



Figure 8. The effect of increasing concentra- 

 tions of silicon dioxide (all parti- 

 cles <15 micrometers) on carbon 

 assimilation of Stichoaooaaus sp. 



16 



