165 

 Tabel 4. 





I 



(Aug. -17) 





II 



Aug. '18) 







Aantal per Liter 





Aantal per Liter 





Qonrf 















%J\J\Jl L. 





Vh. centrif. 



verlies 





Vh. centrif 



verlies 





i/h. filter. 



neerslag. 



0/ 



/o 



Vh. filter. 



neerslag. 



7o 



Dinobryon spec. 



7600 

















Pediastrum duplex 



22800 











1000 











„ Boryanum 



41800 



4200 



10 



39000 



4600 



10 



tetras 



4000 



1840 



31 



16000 











Oocystis lacustris 



19000 



4200 



18 



16500 



3680 



18 



Tetraedron minimum 



30700 



6400 



17 



6000 



920 



13 



Scenedesmus Hystrix 









21000 



920 



3 



quadricauda 



304000 



16800 



5 



171000 



8280 



5 



Dictyosphaerium 















Ehrenbergianum 









7500 











Actinastrum Hantzschii 



7600 

















Coelastrum microporum 



34200 



4200 



11 



1500 











Cosmarlum kleine vormen 



19000 



4200 



18 



10500 



920 



8 



„ groote „ 



1500 

















Gonatozygon Kinahani 



3800 

















Melosira Binderiana 



416800 



14600 



3 









Cyclotella spec. 



45600 



23200 



34 



18000 



2760 



14 



Fragilaria crotonensis 



7600 











13500 











„ capucina 









10000 



920 



8 



„ construens 









37500 











Synedra spec. 



100000 



16800 



15 









Asterionella gracillima 



22800 



2000 



8 



1500 











Chroococcus limneticus 



186200 



27000 



13 



162000 



7360 



4 



Microcystis aeruginosa 



3800 











1500 











Gomphosphaeria lacustris 



117200 



4200 



3 



23000 



5200 



19 



Coelosphaerium 















Kutzingianum 



171000 



16000 



9 



2325000 



253000 



10 



Anabaena spec. 



4200 











4500 



920 



17 



