OTHER DINOFLAGELLATES: The collective 

 distribution of several additional species of dinoflagellates, 

 both armored and naked, is shown in figure 15. Points of 

 population maxima are generally within the most turbid 

 zones. These organisms may have been minor contrib- 

 utors to turbidity, but the presence of populations of the 

 order of 60 cells per ml in clear water of 60-to-70-percent 

 transparency near the bottom from 2000 6 July to 0200 

 7 July indicates that such cells must be in greater concentra- 

 tions before light transmission is greatly affected. 



1800 



2200 



0200 0600 



TIME (HOURS) 



1000 



1400 



Figure 15. Distribution of other dinoflagellates (organisms per ml), with trans- 

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



32 



