Ecologie des foraminifères planctoniques du golfe de Gascogne ...

tel-00480660, version 1 - 4 May 2010
Species /mixed layer light Bearing symbionts ?
G. bulloides No (Hemleben et al., 1989)
G. siphonifera
nearby (Fairbanks et al
1982); shallow mixed layer
(Ufkes et al 1998)
When place in normal light and dark
light : increase size foraminifera and
symbionte density; if let in dark : eat
their symbiontes (Faber et al 1988)
Yes ; Chrysophytes (Hemleben et al 1989; Faber et al 1988); all symbionte exhibit a diurnal
migration from the shell interior to distal parts of foraminifera spines in the light, cycle endo
exocyte? (Spero, 1987); dinoflagellates (Faber et al 1988)
G. calida ?
T. quinqueloba
G. glutinata
nearby (Fairbanks et al
1982); coincides with a
deep mixed layer and a
decrease of surface water
temp (Schiebel et al; 2000)
seems not be limited by light (Schiebel
et al, 2000)
Yes and No, species describes with and without symbionts: "shallow assymbiotic" in pacific
ocean bear symbionts but crysophycophytes symbiontes which is not appear to contribute as
much to host nutrition (Ortiz et al 1995). Contain symbionts (Hemleben et al, 1989). Bear
symbionts (Schiebel et al 2000).
Yes and No, facultative, when symbionts are abundant (Hemleben et al., 1989);
Chrysophycophytes (Faber et al 1988)
G. uvula ?
G. ruber (white)
G. trilobus trilobus
G. trilobus sacculifer
nearby (Fairbanks et al
1982)
Nearby (Fairbanks et al
1982)
(cf p 131 Hemleben et al 1989); high
dependence of their alguae symbiont
=> upper part of column ( upper part of column
(