376 J.E. Hobbieetal. 



FIGURE 8-12. Numbers of ciliates in Pond B sedi- 

 ments during the summers of 1971, 1972 and 1973. 



100 



a> 



if 50 



a> 

 a. 



hisfophoges 



i— ' 1 L. 



20 

 Jun 



J I I I L. 



10 20 



Jul 



Aug 



FIGURE 8-13. Percentage distribution of 

 feeding types among the total ciliate popu- 

 lation of the pond sediments, based on 

 numbers. 



