FN Archimer Export Format
PT J
TI Content in fatty acids and carotenoids in phytoplankton blooms during the seasonal sea ice retreat in Hudson Bay complex, Canada
BT 
AF Amiraux, Rémi
   Lavaud, Johann
   Cameron-Bergeron, Kasey
   Matthes, Lisa C.
   Peeken, Ilka
   Mundy, Christopher J.
   Babb, David G.
   Tremblay, Jean-Eric
AS 1:1;2:1,2;3:1;4:1;5:3;6:4;7:4;8:1;
FF 1:;2:;3:;4:;5:;6:;7:;8:;
C1 Takuvik International Research Laboratory, Québec Océan, Laval University (Canada) - CNRS, Département de biologie and Québec-Océan, Université Laval, Québec, QC, Canada
   UMR6539 LEMAR-Laboratory of Environmental Marine Sciences, CNRS/Univ Brest/Ifremer/IRD, Institut Universitaire Européen de la Mer, Plouzané, France
   Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany
   Centre for Earth Observation Science, University of Manitoba, Winnipeg, MB, Canada
C2 UNIV LAVAL, CANADA
   CNRS, FRANCE
   INST A WEGENER, GERMANY
   UNIV MANITOBA, CANADA
SI BREST
UM LEMAR
IN DOAJ
IF 3.9
TC 0
UR https://archimer.ifremer.fr/doc/00806/91749/97710.pdf
   https://archimer.ifremer.fr/doc/00806/91749/97711.png
   https://archimer.ifremer.fr/doc/00806/91749/97712.png
   https://archimer.ifremer.fr/doc/00806/91749/97713.docx
LA English
DT Article
DE ;Hudson Bay complex;Spring phytoplankton bloom;Long chain polyunsaturated fatty acids;Docosahexaenoic acid;Eicosapentaenoic acid;Carotenoid;Fucoxanthin;Peridinin
AB The Hudson Bay complex (HBC) is home to numerous indigenous communities that traditionally have relied heavily on its marine resources. The nutritional quality and stocks of the entire HBC food web depend in large part on the phytoplankton production of bioactive molecules (long chain polyunsaturated fatty acids and carotenoids) and their transfer through trophic levels. The purpose of this study was thus to determine which molecules were produced during spring phytoplankton blooms, as well as the environmental factors driving this production. We investigated 21 stations in 5 sub-regions of the HBC. At the time of sampling, the sub-regions studied had different environmental settings (e.g., ice cover, nutrients, seawater salinity and temperature) conditioning their bloom stages. Pre- and post-bloom stages were associated with relatively low concentrations of bioactive molecules (either fatty acids or carotenoids). In contrast, the highest concentrations of bioactive molecules (dominated by eicosapentaenoic acid and fucoxanthin) were associated with the diatom bloom that typically occurs at the ice edge when silicates remain available. Interestingly, the large riverine inputs in eastern Hudson Bay led to a change in protist composition (larger contribution of Dinophyceae), resulting in lower while more diverse content of bioactive molecules, whether fatty acids (e.g., α-linolenic acid) or carotenoids (e.g., peridinin). As greater stratification of the HBC is expected in the future, we suggest that a mixotrophic/heterotrophic flagellate-based food web would become more prevalent, resulting in a smaller supply of bioactive molecules for the food web. 
PY 2022
PD AUG
SO Elementa: Science of the Anthropocene
SN 2325-1026
PU University of California Press
VL 10
IS 1
DI 10.1525/elementa.2021.00106
ID 91749
ER

EF