VERTICAL MIGRATION RECONSIDERED 



333 



PHYTOPLANKTON IN MILLIONS OF CELLS 

 >0 005 01 01 10 10 100 



| B B | 2 A 68 2 4 68| 2 4- 6 B | 2 4 6 8| Z 



HOUR 

 12 



II 13 



10 14- 

 09 15 



OB 16-1 6 



O * 



07 17- 



06 18 

 05 19 

 04 20- 

 03 21 

 02 22 

 01 23 

 



□ 

 □C 



O 



o 



Q 







i i i i i i mi 



i i i 1 1 in 



i i 



i i i i 1 1 1 



8 so 



o P*\ 

 u oo \ 



a \ 



o 



DO 



no 

 n 



D 



n * x 



x o \ 



oo x 



-OLT-TT- 



o 



n ° 



o 



o 



o 



SUNRISE AND SUNSET 



O 

 O 

 O 



OO 



oo 



a 



ooo 



'ID 



1000 



4 6 8 



i i i 1 1 1 



o 

 o 

 o 

 a 



oo 



o 



D 



□□ 



oo 



>0005 001 



HOUR 

 12 H 



II 13 



10 14 



09 15 



08 16 



07 17 



06 IS 



05 19 



04 20- 



03 21 



02 22 



01 23 







6 8 



i i ml 



PHYTOPLANKTON IN MILLIONS OF CELLS 



01 10 10 100 



1000 



2 4 6 8 

 I I i I lllll 



2 4 6 8 

 _J I i I I nil 



2 4-6 8 

 I I i I l III 



2 4 6 8 

 I I I I I Mil 



2 4 6 6 

 I I I I I i M 



o&o 



X OOO 



Don 



DO 



O x 



°oo 

 on x 



RH°° 



r DD oo 

 v_ ao_ 



\ * 



x N ° 



8 8 \o 



do 

 o 



6 *s 



SB 



o 



o 



oo 

 oo 



oo \ x 



00 x \ ° 



*oo 6 x s 

 OO x oo\ 

 x DO O OOO \ 

 O x Ox 



o -6a 



□ a 



o 

 o 

 o 

 o 



.B 



no 

 ao 

 no 



no 



DO 



no 



o oo oo 



O DO DO 



x D DD oo 



on a D 

 a 



00 D SUNRISE AND SUNSET 



on 



on 



OOD 



on * * 



OD o 88B oo 



OOO R OO DO 



oonx xon do 



OOOD _Ar^-. 



o 



nc 



>! X 



3a 



8B D 



-OTJ— 



OOD 

 OOD 



OO 

 OO 

 OO 



■o- 

 n 



o 

 o 



oo 



DO 

 D 



D 

 D 



DO 

 OO 



"OCT 



OOD 

 ODD 



n 



Fig. 170. For explanation see text. 



43 



