FN Archimer Export Format
PT J
TI Efficiency of sympagic-benthic coupling revealed by analyses of n-3 fatty acids, IP25 and other highly branched isoprenoids in two filter-feeding Arctic benthic molluscs: Mya truncata and Serripes groenlandicus
BT 
AF Amiraux, Rémi
   Archambault, Philippe
   Moriceau, Brivaela
   Lemire, Mélanie
   Babin, Marcel
   Memery, Laurent
   Massé, Guillaume
   Tremblay, Jean-Eric
AS 1:1,2;2:1,3;3:2;4:4;5:1;6:2;7:1;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, Québec, Canada
   Laboratoire des Sciences de l'Environnement MARin (LEMAR), UMR 6539 CNRS/Ifremer/IRD/UBO, Institut Universitaire Européen de la Mer (IUEM), Technopôle Brest-Iroise, Plouzané, France
   ArcticNet, Québec Océan, Département de Biologie, Université Laval, Quebec, QC, Canada
   Axe santé des populations et pratiques optimales en santé, Centre de recherche du CHU de Québec, Université Laval, Québec, Canada
C2 UNIV LAVAL, CANADA
   CNRS, FRANCE
   UNIV LAVAL, CANADA
   UNIV LAVAL, CANADA
UM LEMAR
IN WOS Cotutelle UMR
   copubli-int-hors-europe
IF 3.623
TC 9
UR https://archimer.ifremer.fr/doc/00658/77023/78298.pdf
LA English
DT Article
DE ;Arctic shelves;Sympagic-benthic coupling;IP25;HBI;n-3 PUFA;EPA;DHA;Mya truncata;Serripes groenlandicus;ice-derived HBI III
AB The aim of this work was to determine the impact of sympagic (ice-associated) algal primary production on the quality of Arctic filter-feeding bivalves. For this purpose, we investigated the sea ice production of lipids (including omega−3 polyunsaturated fatty acids (n-3 PUFA) and highly branched isoprenoids (HBI)), as well as their subsequent incorporation into the truncate softshell clam (Mya truncata) and the Greenland cockle (Serripes groenlandicus) during the melting periods of two consecutive years in Baffin Bay. Lipid and primary production exhibited seasonal variability and overall contrasts between the two years as a result of distinct physical forcings and the ensuing biological responses. Whilst less productive in terms of total lipids or chlorophyll a, Spring 2016 was more productive than Spring 2015 for n-3 PUFA, which are essential for benthic fauna. The sea ice diatom HBI biomarker IP25 was quantified in sea ice from both years. Interestingly, such production was preceded by a production of the hitherto ‘pelagic’ biomarker, HBI III, in sea ice. In bivalves, HBI contents and correlations confirmed the tightness of the Arctic sympagic-benthic coupling and highlighted that S. groenlandicus can be used as a sentinel species for assessing the degree of this coupling. The confirmation that bivalves incorporate sea-ice derived HBI III and not only IP25, may introduce uncertainties into the use of some HBI-based indices. Monitoring of the fatty acid contents of bivalves allowed identification of their spawning periods and suggests that M. truncata did not store enough n-3 PUFA to sustain its reproductive effort. 
PY 2021
PD JAN
SO Organic Geochemistry
SN 0146-6380
PU Elsevier BV
VL 151
UT 000611983000010
DI 10.1016/j.orggeochem.2020.104160
ID 77023
ER

EF