1. Population response of the estuarine copepod Eurytemora affinis to its bioaccumulation of trace metals
- Author
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Sami Souissi, Capucine Bialais, Christophe Flahaut, Benoit Cudennec, Thierry Grard, Zakia Boubechiche, Yen-Ju Pan, Mahammed Zidour, Djamel Drider, Baghdad Ouddane, Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 (LOG), Centre National de la Recherche Scientifique (CNRS)-Université du Littoral Côte d'Opale (ULCO)-Université de Lille-Institut national des sciences de l'Univers (INSU - CNRS), Université Lille Nord de France (COMUE), Institut Charles Viollette (ICV) - ULR 7394 (ICV), Université d'Artois (UA)-Université du Littoral Côte d'Opale (ULCO)-Institut Supérieur d'Agriculture-Université de Lille-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Université d'Artois (UA), Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 (LASIRE), Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Centrale Lille Institut (CLIL), Institut national des sciences de l'Univers (INSU - CNRS)-Université du Littoral Côte d'Opale (ULCO)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Nord]), Biochimie des Produits Aquatiques (BPA), Université du Littoral Côte d'Opale (ULCO)-Transfrontalière BioEcoAgro - UMR 1158 (BioEcoAgro), Université d'Artois (UA)-Université de Liège-Université de Picardie Jules Verne (UPJV)-Université du Littoral Côte d'Opale (ULCO)-Université de Lille-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Université d'Artois (UA)-Université de Liège-Université de Picardie Jules Verne (UPJV)-Université du Littoral Côte d'Opale (ULCO)-Université de Lille-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), and Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)
- Subjects
Environmental Engineering ,Eurytemora affinis ,Health, Toxicology and Mutagenesis ,0208 environmental biotechnology ,Population ,chemistry.chemical_element ,02 engineering and technology ,010501 environmental sciences ,01 natural sciences ,Copepods ,Metal ,Copepoda ,Animal science ,[SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry ,Nickel ,Environmental Chemistry ,Animals ,education ,ComputingMilieux_MISCELLANEOUS ,0105 earth and related environmental sciences ,geography ,education.field_of_study ,Cadmium ,geography.geographical_feature_category ,Toxicity ,biology ,Estuary ,Public Health, Environmental and Occupational Health ,Population effect ,General Medicine ,General Chemistry ,biology.organism_classification ,Bioaccumulation ,Pollution ,Copper ,LC50 ,020801 environmental engineering ,chemistry ,Trace metal ,visual_art ,visual_art.visual_art_medium ,Estuaries ,Copepod ,Water Pollutants, Chemical - Abstract
International audience; We evaluated the acute toxicities of metals cadmium (Cd), copper (Cu) and nickel (Ni) to a widely-distributed copepod Eurytemora affinis isolated from the Seine estuary. Both sexes of adult E. affinis were exposed separately to the three metals at concentration gradients to determine its 50% lethal concentration (LC50). After 4 days of exposure, both males and females showed a higher sensitivity to Cu (male LC50: 25.0 μg.L−1 and female LC50: 38.0 μg.L−1) than to Ni (male LC50: 90.0 μg.L−1 and female 161.0 μg.L−1) and Cd (male LC50: 127.8 μg.L−1 and female LC50: 90.0 μg.L−1). To assess for the first time, the extend of metal bioaccumulation and its effect at population scale, late stages (>200 μm) were collected and exposed to each metal at the concentration of 1/3 LC50, and to their mixture during 144 h without feeding. The Cd concentration consistently increased with time until the end of the experiment, whereas the Ni and Cu concentrations reached a plateau after 24 h and 72 h exposure, respectively. The results revealed that the copepods could accumulate Cu faster than Ni and Cd either in the treatment alone (0.58 L g−1.d−1) or in the three-metal mixture (0.72 L g−1.d−1) after 50% of exposure time (72 h). The number of individuals decreased in copepod populations except for the Cd treatment, where the number of nauplii increased. In addition, all treatments of metal exposure negatively affected bacterial densities in the copepod cultures, where the Cu treatment showed a negative remarkable effect compared with Cd and Ni treatment did.
- Published
- 2018