FN Archimer Export Format
PT J
TI Two cetacean species reveal different long-term trends for toxic trace elements in European Atlantic French waters
BT 
AF Mendez Fernandez, Paula
   Spitz, Jérôme
   Dars, Cécile
   Dabin, Willy
   Mahfouz, Celine
   André, Jean-Marc
   CHOUVELON, Tiphaine
   Authier, Matthieu
   Caurant, Florence
AS 1:1;2:1,2;3:1;4:1;5:3;6:4;7:1,5;8:1;9:1,2;
FF 1:;2:;3:;4:;5:;6:;7:PDG-RBE-CCEM;8:;9:;
C1 Observatoire Pelagis, UMS 3462- La Rochelle Université - CNRS, 5 Allées de L'océan, 17000, La Rochelle, France
   Centre D’Etudes Biologiques de Chizé-La Rochelle, UMR 7372- Université de La Rochelle-CNRS, 5 Allées de L'océan, 17000, La Rochelle, France
   National Center for Marine Sciences, National Council for Scientific Research in Lebanon (CNRS-L), Beirut, Lebanon
   IMS UMR 5218, CIH, ENSC, Bordeaux INP, Bordeaux, France
   Ifremer, Unité Biogéochimie et Écotoxicologie, Laboratoire de Biogéochimie des Contaminants Métalliques (BE/LBCM), Rue de L'île D'Yeu, BP 21105, 44311, Nantes Cedex 03, France
C2 UNIV LA ROCHELLE, FRANCE
   UNIV LA ROCHELLE, FRANCE
   CNRS LIBAN, LEBANON
   ENSC, FRANCE
   IFREMER, FRANCE
SI NANTES
SE PDG-RBE-CCEM
IN WOS Ifremer UPR
   copubli-france
   copubli-univ-france
   copubli-int-hors-europe
   copubli-sud
IF 8.8
TC 6
UR https://archimer.ifremer.fr/doc/00748/85998/99918.pdf
LA English
DT Article
DE ;Temporal variation;Detoxification process;Dynamic linear models;Common dolphin;Harbour porpoise;North-east atlantic
AB Cetaceans have been naturally exposed to toxic trace elements (TEs) on an evolutionary time scale. Hence, they have developed mechanisms to control and/or mitigate their toxic effects. These long-lived species located at high trophic positions and bioaccumulating toxic elements are assumed to be good biomonitoring organisms. However, anthropogenic emissions have strongly increased environmental levels of toxic TEs in the last decades, questioning the efficiency of the detoxication mechanisms in cetaceans. In this context, temporal trends of mercury (Hg), cadmium (Cd) and lead (Pb) concentrations were studied through the analysis of 264 individuals from two cetacean species the common dolphin (Delphinus delphis) and the harbour porpoise (Phocoena phocoena) and belonging to two different Management Units (MUs) for the latter. These individuals stranded along the French Atlantic coasts from 2000s to 2017. All the trends presented were age- and sex-corrected and stable isotope ratios of carbon (δ13C) and nitrogen (δ15N) were measured as proxies of their feeding ecology. Results showed that Pb concentrations clearly decreased over time in both species and MUs. This decrease agrees with the lead petrol regulation after 2000s, supporting the use of these species as valuable bioindicators of changes for TE levels in the marine environment. A significant long-term increase of total Hg concentrations was only observed in common dolphins. Cadmium concentrations also revealed different trends over the period in both species. The different Hg and Cd trends observed in the two species, probably reflected a contrasted contamination of habitat and prey species than a global increase of the contamination in the environment. These results highlight the necessity and gain of using different species to monitor changes in marine environments, each of them informing on the contamination of its own ecological niche. Lastly, the Se:Hg molar ratios of species suggested a low risk for Hg toxicity over time. 
PY 2022
PD MAY
SO Chemosphere
SN 0045-6535
PU Elsevier BV
VL 294
UT 000758330900002
DI 10.1016/j.chemosphere.2022.133676
ID 85998
ER

EF