182 



Marine Microbiology 

 TABLE 2 



Highest Degree of Transmigration After 8 Days of Some Species of 



Microbes Through a Column of Sand (Number of Living Cells/ml. as% 



OF Cell Content/ml. of the Migrating Suspension) 



Marine Conditions 



Limnic Conditions 



Sea Sand Quartz Sand Sea Sand Quartz Sand 

 (1.0-0.2 mm) (0.2-0.1 mm) (1.0-0.2 mm) (0.2-0.1 mm) 



log KG' 

 I ml ■ 



lo-'- 



10 ; 



10" 



lO'i 



10' 



OH 



\ 



\ 



Filtration Elution ^ 



Stamm Bl Ic 



-• Mm- Quartz sand 

 -olim- Seasand 



X X mar- Quartz sand 



A Amor - Seasand 



AKG lim 2,2xlO« 



AKG mar 2 x 10^ 



T 1 — n — r- 



1 1—1 — I — r 



-I — I — I — I I 



30' I" 2"3"5" I2"24'48'' 0' 2' 30 I" 2'3"5" l' 2!^€€ log Zelt 



30' = minutes I - hours I = days (better I ) 



Fig. 2. Micrococcus. B/lc. Behaviour during filtration and elution under 

 marine and limnic conditions. Abscis.se: log time. Ordinate: log living cells/ 



ml water. 



