FN Archimer Export Format
PT J
TI Response of the protozooplankton assemblage during the European Iron Fertilization Experiment (EIFEX) in the Antarctic circumpolar current
BT 
AF ASSMY, Philipp
   CISEWSKI, Boris
   HENJES, Joachim
   KLAAS, Christine
   MONTRESOR, Marina
   SMETACEK, Victor
AS 1:1,2;2:3;3:4;4:2;5:5;6:2;
FF 1:;2:;3:;4:;5:;6:;
C1 Norwegian Polar Res Inst, Fram Ctr, N-9296 Tromso, Norway.
   Alfred Wegener Inst Helmholtz Ctr Polar & Marine, D-27570 Bremerhaven, Germany.
   Thunen Inst Sea Fisheries, D-22767 Hamburg, Germany.
   IMARE Inst Marine Resources Gmbh, D-27570 Bremerhaven, Germany.
   Stn Zool A Dohrn, I-80121 Naples, Italy.
C2 NORWEGIAN POLAR INST, NORWAY
   INST A WEGENER, GERMANY
   THUNEN INST SEA FISHERIES, GERMANY
   IMARES, GERMANY
   STN ZOOL A DOHRN, ITALY
IF 2.407
TC 8
UR https://archimer.ifremer.fr/doc/00290/40091/39174.pdf
   https://archimer.ifremer.fr/doc/00290/40091/39177.pdf
   https://archimer.ifremer.fr/doc/00290/40091/39178.docx
LA English
DT Article
CR MD 145 / KEOPS
   MD 188 / KEOPS 2
   VT /  KEOPS 2006
   VT 125 / KEOPS2_MOOR
   VT 86 / KEOPS
BO Marion Dufresne
DE ;protozoa;rhizaria;sarcodines;Southern Ocean;top-down control
AB Ocean iron fertilization experiments enable the quantitative study of processes shaping the structure and functioning of pelagic ecosystems following perturbation under in situ conditions. EIFEX was conducted within a stationary eddy adjacent to the Antarctic Polar Front over 38 days in February/March 2004 and induced a massive diatom bloom. Here, we present the responses in abundance and biomass of all identifiable protozooplankton taxa (heterotrophic protists ranging from 2 to 500 mm) during the bloom. Acantharia, dinoflagellates and ciliates together contributed >90% of protozooplankton biomass in the upper 100 m throughout the experiment with heterotrophic nanoflagellates, nassellaria, spumellaria, phaeodaria, foraminifera and the taxopodidean Sticholonche zanclea providing the remainder. Total protozooplankton biomass increased slightly from 1.0 to 1.3 g C m(-2) within the fertilized patch and remained at 0.7+0.04 g C m(-2) outside it. However, distinct trends in population build-up or decline were observed within the dominant taxa in each group. In general, smaller less-defended groups such as aloricate ciliates and athecate dinoflagellates declined, whereas the biomass of large, spiny and armoured groups, in particular acantharia, large tintinnids and thecate dinoflagellates increased inside the patch. We attribute the higher accumulation rates of defended taxa to selective, heavy grazing pressure by the large stocks of copepods. Of the defended taxa, acantharia had the lowest mortality rates and the highest biomass. Large stocks of tintinnid loricae in the deep water column identify this group as a relevant contributor to deep organic carbon export. Highest accumulation rates (0.11 day(-1)) were recorded in S. zanclea.
PY 2014
PD SEP
SO Journal Of Plankton Research
SN 0142-7873
PU Oxford Univ Press
VL 36
IS 5
UT 000342235000002
BP 1175
EP 1189
DI 10.1093/plankt/fbu068
ID 40091
ER

EF