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Marine sponges as a powerful tool for trace elements biomonitoring studies in coastal environment

Abstract : In this work, we performed a comparative study on six marine sponge species collected along the French Mediterranean and Irish coasts for their TEs accumulation. Intra and inter-species variabilities were examined. Among the Mediterranean species, Cymbaxinella damicornis accumulates significantly more As and Cu than others sponge species; Chondrilla nucula more Ni and Mo and Acanthella acuta more Ag. Among Irish samples, Hymeniacidon perlevis showed higher accumulation properties for most of TEs in comparison to Halichondria panicea. Bioconcentration Factors were > 1 in all species for most of TEs. This study suggests that TEs bioaccumulation is most likely associated to differences in morphological features and/or to specific bacterial communities associated to different species. The determination of Pb isotope ratios revealed mainly natural Pb sources for Mediterranean and Kilkieran Bay's samples, and rather anthropogenic influence for Belfast samples. This study confirms that sponges represent a powerful tool for biomonitoring studies.
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Anna Maria Orani, Aurélie Barats, Emilia Vassileva, Olivier P Thomas. Marine sponges as a powerful tool for trace elements biomonitoring studies in coastal environment. Marine Pollution Bulletin, Elsevier, 2018, 131, pp.633-645. ⟨10.1016/j.marpolbul.2018.04.073⟩. ⟨hal-01852759⟩

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