FN Archimer Export Format
PT J
TI Cu and Zn stable isotopes in suspended particulate matter sub-fractions from the Northern Bay of Biscay help identify biogenic and geogenic particle pools
BT 
AF FERREIRA ARAUJO, Daniel
   KNOERY, Joël
   Briant, Nicolas
   Ponzevera, Emmanuel
   Mulholland, Daniel Santos
   Bruzac, Sandrine
   Sireau, Teddy
   Chouvelon, Tiphaine
   Brach-Papa, Christophe
AS 1:1;2:1;3:1;4:1;5:2;6:1;7:1;8:1,2,3;9:4;
FF 1:PDG-RBE-CCEM;2:PDG-RBE-CCEM;3:PDG-RBE-CCEM;4:PDG-RBE-CCEM;5:;6:PDG-RBE-CCEM;7:PDG-RBE-CCEM;8:PDG-RBE-CCEM;9:PDG-ODE-LITTORAL-LERPAC;
C1 Ifremer, CCEM Centre Atlantique, Unité Contamination Chimique des Écosystèmes Marins, F-44000, Nantes, France
   Laboratório de Águas e Efluentes & Laboratório de Análises Ambientais, Universidade Federal do Tocantins, Rua Badejos, Gurupi, TO, Brazil
   Observatoire Pelagis, UAR 3462 La Rochelle Université-CNRS, 17000, La Rochelle, France
   Ifremer, Centre Méditerranée, Unité Littoral, Laboratoire Environnement Ressources Provence-Azur-Corse (LERPAC), 83507, La Seyne-sur-Mer Cedex, France
C2 IFREMER, FRANCE
   UNIV FED TOCANTINS, BRAZIL
   UNIV LA ROCHELLE, FRANCE
   IFREMER, FRANCE
SI NANTES
   TOULON
SE PDG-RBE-CCEM
   PDG-ODE-LITTORAL-LERPAC
IN WOS Ifremer UPR
   copubli-france
   copubli-univ-france
   copubli-int-hors-europe
   copubli-sud
IF 2.3
TC 5
UR https://archimer.ifremer.fr/doc/00779/89074/94634.pdf
LA English
DT Article
CR CAMELIA
DE ;Bay of Biscay;Loire estuary;Trace metal biogeochemistry;Isotope tracer;Cu and Zn stable Isotopes;MC-ICP-MS
AB Marine suspended particulate matter (SPM) plays a pivotal role in the marine biogeochemical cycling of trace elements. This study investigates metal distributions and copper (Cu) and zinc (Zn) stable isotope ratios in different size fractions of SPM from two sampling stations on the inner continental shelf of northern Bay of Biscay (NE Atlantic), a zone highly influenced by the macrotidal Loire estuary, the outlet of a major European river. The objective of this study is to test stable isotopes as tools to infer the origins of particles and their formation processes, and to infer relevant Cu and Zn biogenic pools involved in marine trophic transfers of these metals. SPM samples were nearly quantitatively mineralized (i.e., without HF) to determine metals and Cu and Zn isotopes in their more labile and reactive phases. Their δ65CuSRM-976 values ranged from −0.45 to +0.51‰, with higher Cu concentrations accompanying particle size decreasing. The δ66ZnJMC-Lyon values in SPM sub-fractions varied from +0.14 to +0.76‰, and were uncorrelated to both Zn concentrations and particle size. Compared to larger size fractions, increased Al and Fe levels (proxies for terrigenous materials) and enrichments in lighter Cu and Zn isotopes observed in the smaller size SPM sub-fractions suggest that a major proportion of SPM Cu and Zn is associated with geogenic particles. Conversely, the relative enrichment of heavy isotopes in coarser particles is attributable to an increase of Cu and Zn metabolically incorporated into biogenic organic particles (e.g., plankton), and by surface adsorption onto organic detrital particles. The higher δ-values attributed to biogenic particles likely represents the isotope composition of the local marine organic matter available to primary consumers like filter-feeders (oysters). Thus, this study shows that targeting particles of specific size classes allows to identify relative dominances of biogenic and geogenic carrier phases. Identifying these pools and their isotopic composition may help track Cu and Zn transfers through marine food-web metal in future studies 
PY 2022
PD JUN
SO Continental Shelf Research
SN 0278-4343
PU Elsevier BV
VL 244
UT 000828005000005
DI 10.1016/j.csr.2022.104791
ID 89074
ER

EF