Temporal variations in the level of chlordecone in seawater and marine organisms in Martinique Island (Lesser Antilles)

Type Article
Date 2022-11
Language English
Author(s) Dromard Charlotte R.1, Allenou Jean-PierreORCID2, Tapie Nathalie3, Budzinski Hélène3, Cimmaterra Nicolas2, de Rock Pauline2, Arkam Salim1, Cordonnier Sébastien1, Gonzalez Jean-LouisORCID4, Bouchon-Navaro Yolande1, Bouchon Claude1, Thouard Emmanuel2
Affiliation(s) 1 : Unité Biologie Des Organismes et Écosystèmes Aquatiques (BOREA), Université Des Antilles, MNHN, Sorbonne Université, Université de Caen Normandie, CNRS, IRD, BP 592, 97157, Pointe-à-Pitre, Guadeloupe, France
2 : IFREMER, Unité Biodiversité Et Environnement de La Martinique, 79 route de Pointe Fort, 97231, Le Robert, France
3 : UMR CNRS 5805 EPOC – OASU, Équipe LPTC, Université de Bordeaux, 351 Cours de la libération, 33405, Talence Cedex, France
4 : IFREMER, Département Océanographie et Dynamique Des Ecosystèmes, Laboratoire Environnement Ressources de Provence-Azur-Corse, Z.P. de Brégaillon CS20330, 83507, La Seyne/mer cedex, France
Source Environmental Science And Pollution Research (0944-1344) (Springer Science and Business Media LLC), 2022-11 , Vol. 29 , N. 54 , P. 81546-81556
DOI 10.1007/s11356-022-21528-9
Keyword(s) Organochlorine pollution, Mangrove, Seagrass, Coral reef, Passive samplers, Stable isotopes

The present study, conducted in the Galion Bay in Martinique, aims to highlight the temporal and seasonal variations of chlordecone contamination (an organochlorine pollutant) in the ambient environment (seawater) and also in the marine organisms in three main coastal marine habitats (mangroves, seagrass beds and coral reefs). To this end, two methodologies were used to measure and compare the chemical contamination of seawater during 13 months (spot samplings and POCIS technique). In parallel, concentrations of chlordecone and isotopic ratios (C and N) were carried out on marine organisms, collected during two contrasting climatic periods (dry and rainy), to evidence seasonal variations. The results showed that the contamination of seawater displayed significant variations over time and depended on environmental factors such as water flows, which imply dilution and dispersion phenomena. Concerning the marine organisms, the level of contamination varied considerably between the two seasons in seagrass beds with higher levels of contamination during the rainy season. Reef organisms were more moderately affected by this pollution, while mangrove organisms showed a high level of chlordecone whatever the season. Finally, isotope analyses highlighted that bioamplification along marine food webs occurs at each season and each station.

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Dromard Charlotte R., Allenou Jean-Pierre, Tapie Nathalie, Budzinski Hélène, Cimmaterra Nicolas, de Rock Pauline, Arkam Salim, Cordonnier Sébastien, Gonzalez Jean-Louis, Bouchon-Navaro Yolande, Bouchon Claude, Thouard Emmanuel (2022). Temporal variations in the level of chlordecone in seawater and marine organisms in Martinique Island (Lesser Antilles). Environmental Science And Pollution Research, 29(54), 81546-81556. Publisher's official version : https://doi.org/10.1007/s11356-022-21528-9 , Open Access version : https://archimer.ifremer.fr/doc/00779/89072/