FN Archimer Export Format
PT J
TI Planktic foraminifer and coccolith contribution to carbonate export fluxes over the central Kerguelen Plateau
BT 
AF REMBAUVILLE, M.
   MEILLAND, J.
   ZIVERI, P.
   SCHIEBEL, R.
   BLAIN, S.
   SALTER, I.
AS 1:1;2:2;3:3,4;4:2,5;5:1;6:1,6;
FF 1:;2:;3:;4:;5:;6:;
C1 Univ Paris 06, Sorbonne Univ, CNRS, Observ Oceanol,Lab Oceanog Microbienne LOMIC, F-66650 Banyuls Sur Mer, France.
   Univ Angers, UMR CNRS 6112, LPG BIAF Bioindicateurs Actuels & Fossiles, 2 Blvd Lavoisier, F-49045 Angers, France.
   Univ Autonoma Barcelona, ICREA ICTA, Edifici Z,Carrer de les Columnes S-N, E-08193 Barcelona, Spain.
   ICREA, Catalan Inst Res & Adv Studies, Barcelona 08010, Spain.
   Max Planck Inst Chem, Hahn Meitner Weg 1, D-55128 Mainz, Germany.
   Helmholtz Ctr Polar & Marine Res, Alfred Wegener Inst, Handelshafen 12, D-27570 Bremerhaven, Germany.
C2 UNIV PARIS 06, FRANCE
   UNIV ANGERS, FRANCE
   UNIV BARCELONA, SPAIN
   ICREA, SPAIN
   INST MAX PLANCK (CHEM), GERMANY
   INST A WEGENER, GERMANY
IF 2.48
TC 26
UR https://archimer.ifremer.fr/doc/00421/53249/54722.pdf
LA English
DT Article
CR MD 188 / KEOPS 2
BO Marion Dufresne
DE ;Foraminifer;Coccoliths;Export;Carbonate counter-pump;Kerguelen Plateau;Southern Ocean
AB We report the contribution of planktic foraminifers and coccoliths to the particulate inorganic carbon (PIC) export fluxes collected over an annual cycle (October 2011/September 2012) on the central Kerguelen Plateau in the Antarctic Zone (AAZ) south of the Polar Front (PF). The seasonality of PIC flux was decoupled from surface chlorophyll a concentration and particulate organic carbon (POC) fluxes and was characterized by a late summer (February) maximum. This peak was concomitant with the highest satellite-derived sea surface PIC and corresponded to a Emiliania huxleyi coccoliths export event that accounted for 85% of the annual PIC export. The foraminifer contribution to the annual PIC flux was much lower (15%) and dominated by Turborotalita quinqueloba and Neogloboquadrina pachyderma. Foraminifer export fluxes were closely related to the surface chlorophyll a concentration, suggesting food availability as an important factor regulating the foraminifer's biomass. We compared size-normalized test weight (SNW) of the foraminifers with previously published SNW from the Crozet Islands using the same methodology and found no significant difference in SNW between sites for a given species. However, the SNW was significantly species-specific with a threefold increase from T quinqueloba to Globigerina bulloides. The annual PIC:POC molar ratio of 0.07 was close to the mean ratio for the global ocean and lead to a low carbonate counter pump effect (similar to 5%) compared to a previous study north of the PF (6-32%). We suggest that lowers counter pump effect south of the PF despite similar productivity levels is due to a dominance of coccoliths in the PIC fluxes and a difference in the foraminifers species assemblage with a predominance of polar species with lower SNW. 
PY 2016
PD MAY
SO Deep-sea Research Part I-oceanographic Research Papers
SN 0967-0637
PU Pergamon-elsevier Science Ltd
VL 111
UT 000375161500010
BP 91
EP 101
DI 10.1016/j.dsr.2016.02.017
ID 53249
ER

EF