FN Archimer Export Format
PT J
TI Does trace element composition of bivalve shells record utra-high frequency environmental variations?
BT 
AF Poitevin, Pierre
   CHAUVAUD, Laurent
   Pecheyran, Christophe
   LAZURE, Pascal
   Jolivet, Aurélie
   THEBAULT, Julien
AS 1:1,2;2:6;3:3;4:4;5:5;6:1;
FF 1:;2:;3:;4:PDG-ODE-LOPS-OC;5:;6:;
C1 Univ. Brest, CNRS, IRD, Ifremer, LEMAR, F-29280, Plouzané, France
   Fisheries and Oceans Canada, Maurice Lamontagne Institute, Mont-Joli, QC, Canada
   Laboratoire de Chimie Analytique Bio-inorganique et Environnement, Institut Pluridisciplinaire de Recherche sur L’Environnement et Les Matériaux, CNRS, UMR 5254, Université de Pau et des Pays de L’Adour, Pau, France
   Univ. Brest, CNRS, IRD, UBO, Ifremer, LOPS, F-29280, Plouzané, France
   TBM Environnement/Somme, 2 Rue de Suéde, 56400, Auray, France
   Univ. Brest, CNRS, IRD, Ifremer, LEMAR, F-29280, Plouzané, France
C2 UBO, FRANCE
   MPO INST MAURICE LAMONTAGNE, CANADA
   CNRS, FRANCE
   IFREMER, FRANCE
   TBM ENVIRONNEMENT/SOMME, FRANCE
   CNRS, FRANCE
SI BREST
SE PDG-ODE-LOPS-OC
UM LOPS
   LEMAR
IN WOS Ifremer UMR
   WOS Cotutelle UMR
   copubli-france
   copubli-univ-france
   copubli-int-hors-europe
IF 3.13
TC 9
UR https://archimer.ifremer.fr/doc/00612/72400/71345.pdf
LA English
DT Article
DE ;Ultra-high resolution LA-ICPMS;Placopecten magellanicus;Shell chemistry;Trace elements;Environmental change;Bivalve;Environmental proxies;North Atlantic;Saint-Pierre and Miquelon;Coastal trapped wave
AB Saint-Pierre and Miquelon (SPM) is a small archipelago where instrumental measures based on water column velocity and temperature profiles compiled comprehensive evidence for strong near-diurnal (25.8h) current and bottom temperature oscillations (up to 11.5 °C) which is possibly the largest ever observed — at any frequency — on a stratified mid-latitude continental shelf. The main objective of our study was to identify if Placopecten magellanicus can record on its shell these high frequency environmental variations. To this end, we have tried to identify proxies for water temperature and food availability through development of a new ultra-high resolution LA-ICPMS analyses method capable of resolving shell surface elemental composition with a 10 μm resolution. This method was applied on two shell fragments, both representing the third year of growth and 2015 annual growth period, respectively coming from two environmentally contrasted sites, more (30 m depth) or less (10 m depth) affected by high frequency thermal oscillations. Our results strongly suggest a relationship between phytoplankton biomass and barium incorporation into P. magellanicus shells at both sites. Even if P. magellanicus might present a physiological control of magnesium incorporation, the shape of the two Mg/Ca profiles seems to illustrate that temperature also exerts a control on magnesium incorporation in P. magellanicus shells from SPM. While U/Ca and Mg/Ca profiles show a strong positive correlation for 30 m site shell, suggesting that uranium incorporation in P. magellanicus shell is at least partially temperature dependent. The absence of such correlation for 10 m site shell suggests differences in uranium environmental availability or in P. magellanicus biomineralization between these two sites. The resolution of this new analytical method raises questions about such data interpretation related to P. magellanicus growth dynamics and physiology or individual scale based environmental measurements. 
PY 2020
PD JUL
SO Marine Environmental Research
SN 0141-1136
PU Elsevier
VL 158
UT 000537546500007
DI 10.1016/j.marenvres.2020.104943
ID 72400
ER

EF