Oppetiheimer : 



Moul: 



Oppenheimer; 



and surprise them, the Fundulus will stir up the mud from the 

 bottom, but ordinarily they are quite clear. 



Did you study any of the sediments of the bottom and when you 

 made your collections were they always in exactly the same 

 place with respect to the environment of the bottom? 



They were all made at the stake that 1 put in and usually samples 

 of the water itself and the bottom were taken. 



1 was thinking of the bottom primarily, whether the bottom sed- 

 iment changed throughout the period. We find this in the shallow 

 bays to be very true. If the populations which exist in the sedi- 

 ment are directly related to the type of sedimentary material 

 that is there, was it an aerobic or anaerobic state ? 



Moul: 



Some of the bottoms of these pools are anaerobic, I am pretty 

 sure, because by the end of the season they had a tremendous 

 bloom of pink bacteria in the bottom of them. 



Oppenheimer: How did you recognize pink bacteria by the way? 



Moul: 



Chronic: 



Moul: 



Vallentyne: 



Moul: 



I am not familiar with the forms. I just name them pink bacteria, 

 I do not know what they are, or what species. I might say this 

 with respect to the bottom mud, the second paper I am going to 

 read has a little bit about the content of that mud in respect to 

 assay. 



I am kind of interested in your method of determining the rel- 

 ative abundance, X, XX, and XXX. 



This was just a preliminary sort of thing and I have never been 

 able to go back, because the houseboat has never gone back to 

 this area. You have to have a laboratory right there. The de- 

 terminations of abundance are made on the basis of the number 

 of times that I have seen organisms as I moved the slides across 

 the microscope. In other words, if I see a think in every field 

 you will find 3 crosses there. It I find it in an average of every 

 two or three fields, 2 crosses, and if I find it in about every 

 five fields, one cross. 1 think that is about the way this is - 

 just a rough estimate of abundance. Now there are many or- 

 ganisms that are on this list that just occurred now and then. 



I wonder if you would care to comment on whether the species 

 in these genera are primarily marine or fresh water? 



I have the species on many of these. As far as the blue-green 

 algae are concerned, they are practically all what we would 

 term marine. The Cladophora is marine. Enteromorpha , as 



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