TIME 



Other sea-water samples are passed through millipore 

 filters to obtain microscopic organisms. Larger plant 

 and animal plankton, many of which are biolumines- 

 cent, are occasionally collected with fine-meshed 

 fishing nets lowered from the tower booms. 



A time-depth plot of the observed relationship be- 

 tween the percent water transparency (black lines) 

 and the total count of all plankton organisms (white 

 lines) is shown on this composite chart. Over a 

 period of about a day the depth and time of low water 

 transparency zones closely coincides with that of the 

 high microorganism count. 



83 



