TURBIDITY AND THE DISTRIBUTION OF PARTICLES 



Gymnodinium flavum: Similarities in time and space were 

 present between light transmission and the distributional 

 pattern of G. flavum (fig. 12). The areas of highest concentra- 

 tion of G. flavum fell within the 40-percent transmission 

 contours. Decreases in concentration correlated with in- 

 creases in illumination. Light transmission of 6 percent 

 and greater is marked by a decrease in cell count from 

 1200 per ml to 200 per ml. 



1800 



2200 



0200 0600 

 TIME (HOURS) 



1000 



1400 



Figure 12. Distribution of Gymnodinium flavum (organisms per ml), with trans- 

 parency data (percent transmission) in red, Operation I. 



29 



