330
ALAIN BOURNIA
aynchronixc~tl, i.e. : rt rlotic~ublo j)e~-cont~tge of cells riivitle a t the same
t,i~nu ( plly niologint n t ~ - y to niuko t>his percenttbgo tw high as possible).
Wllibt itbout thcj ocean? Are phytoj>lunkton populations naturally
~ync!hr.onizcc\ ! 'I'llis i~ fiir fisom being resolved ; even today, the question
has hurcly btwn olectrly ~ t ~ ~ t a d ,
nor hc~s its importance been fully
roaognist*tl (St,ricklr~ntl, 196H, 1972 ; 1l:j~ple;y c?t nl., 1972).
A. ('r~,llw,r~ experiments
'rl~ougll fl,ugb~ra, Ch,lorella untl other guinea-pigs of algal physiology 1\11 rcvccd :L gonc*rul trelid townrtla nocturnal division (see e.g. Leedale, 1069), rosl~lt,s obtained with cultures of marine phytoplanktem
I
I
I
21
6
i?
18
54
0
LIGHT AND DARd PERlC0S'- 12 HCL'RS €LC5
l'io. I. )'rr~ci~rt~rtcy of tliviclirig c o l l ~ of four rnnrirtc* dinoflagrtllatox at diffctrrrnt times o f
tb li~ht./tl~i~.lc cyclcr (in Swironoy, 1059 : also i*t.l~rr~ctucocl hy Swno~a!y nrul H a ~ t i r ~ ~ n ,
IOfi.' a t ~ t l ).lautin(yx ant1 Swoi~ney, 1064). Noto t,hat, t,ho cliff~.rc:nt s~)r*airv~ wwc: rr:
gt'uwing s t ' ~ ~ . r n t o l y
in inclivi~Iua1 hrrt,chox (Swtr~~ney. pern. comm.j. I)ot!~ nuch II
u~icovwuion oorc1r at ~ t 3 t i for the diff(*mnt n p > :ic~n in the crturso of 24 hour*? (He~"'(~cl~tcc~cl L I ~ liit~cl ~~tlrmiaaion of tho atrtl~c~t, and the American Annociat,ion for the
Atlv~ncc~nt~tit of' Rcir~ncu.)
ALAIN BOURNIA
aynchronixc~tl, i.e. : rt rlotic~ublo j)e~-cont~tge of cells riivitle a t the same
t,i~nu ( plly niologint n t ~ - y to niuko t>his percenttbgo tw high as possible).
Wllibt itbout thcj ocean? Are phytoj>lunkton populations naturally
~ync!hr.onizcc\ ! 'I'llis i~ fiir fisom being resolved ; even today, the question
has hurcly btwn olectrly ~ t ~ ~ t a d ,
nor hc~s its importance been fully
roaognist*tl (St,ricklr~ntl, 196H, 1972 ; 1l:j~ple;y c?t nl., 1972).
A. ('r~,llw,r~ experiments
'rl~ougll fl,ugb~ra, Ch,lorella untl other guinea-pigs of algal physiology 1\11 rcvccd :L gonc*rul trelid townrtla nocturnal division (see e.g. Leedale, 1069), rosl~lt,s obtained with cultures of marine phytoplanktem
I
I
I
21
6
i?
18
54
0
LIGHT AND DARd PERlC0S'- 12 HCL'RS €LC5
l'io. I. )'rr~ci~rt~rtcy of tliviclirig c o l l ~ of four rnnrirtc* dinoflagrtllatox at diffctrrrnt times o f
tb li~ht./tl~i~.lc cyclcr (in Swironoy, 1059 : also i*t.l~rr~ctucocl hy Swno~a!y nrul H a ~ t i r ~ ~ n ,
IOfi.' a t ~ t l ).lautin(yx ant1 Swoi~ney, 1064). Noto t,hat, t,ho cliff~.rc:nt s~)r*airv~ wwc: rr:
gt'uwing s t ' ~ ~ . r n t o l y
in inclivi~Iua1 hrrt,chox (Swtr~~ney. pern. comm.j. I)ot!~ nuch II
u~icovwuion oorc1r at ~ t 3 t i for the diff(*mnt n p > :ic~n in the crturso of 24 hour*? (He~"'(~cl~tcc~cl L I ~ liit~cl ~~tlrmiaaion of tho atrtl~c~t, and the American Annociat,ion for the
Atlv~ncc~nt~tit of' Rcir~ncu.)