FN Archimer Export Format
PT J
TI Distinct bacterial groups contribute to carbon cycling during a naturally iron fertilized phytoplankton bloom in the Southern Ocean
BT 
AF OBERNOSTERER, Ingrid
   CATALA, Philippe
   LEBARON, Philippe
   WEST, Nyree J.
AS 1:1,2;2:1,2;3:1,2,3;4:1,3;
FF 1:;2:;3:;4:;
C1 Univ Paris 06, Observ Oceanol, Lab Oceanog Microbienne, UMR 7621,UMS 2348, Banyuls Sur Mer, France.
   CNRS, Observ Oceanol, Lab Oceanog Microbienne, UMR 7621, Banyuls Sur Mer, France.
   CNRS, Observ Oceanol, UMS 2348, Banyuls Sur Mer, France.
C2 UNIV PARIS 06, FRANCE
   CNRS, FRANCE
   CNRS, FRANCE
IF 3.416
TC 26
UR https://archimer.ifremer.fr/doc/00214/32503/30995.pdf
LA English
DT Article
CR MD 145 / KEOPS
BO Marion Dufresne
AB We investigated the contribution of distinct bacterial groups to bulk abundance and leucine incorporation during a spring phytoplankton bloom induced by natural iron fertilization in the Southern Ocean (Kerguelen Ocean and Plateau Compared Study, January-February 2005). Oligonucleotide probes were designed to target five operational taxonomic units (OTUs) at a narrow phylogenetic level (>= 99% identity of the 16S ribosomal ribonucleic acid [rRNA] gene). During the peak of the phytoplankton bloom, the Roseobacter groups NAC11-7 and RCA, the OTUs SAR92 belonging to Gammaproteobacteria, and the Bacteroidetes OTU Agg58 dominated bulk abundance and leucine incorporation. These four OTUs disappeared with the decline of the bloom, when the cosmopolitan groups SAR11 and SAR86 became dominant. In high-nutrient, low-chlorophyll waters and at a site characterized by transient high phytoplankton biomass, the SAR11 and SAR86 clusters and a Polaribacter OTU dominated abundance and leucine incorporation in the upper 100 m. Our results demonstrate that a few distinct bacterial groups identified on a relatively narrow phylogenetic level account for 47% to 82% of bulk abundance and leucine incorporation during the spring phytoplankton bloom in the naturally fertilized region off Kerguelen. The major role of these bacterial groups in carbon cycling in response to natural iron fertilization in the Southern Ocean suggests they could play an important role in the coupling of the biogeochemical cycles of carbon and iron.
PY 2011
PD NOV
SO Limnology And Oceanography
SN 0024-3590
PU Amer Soc Limnology Oceanography
VL 56
IS 6
UT 000299349700035
BP 2391
EP 2401
DI 10.4319/lo.2011.56.6.2391
ID 32503
ER

EF