Bioaccumulation of Hg, Cu, and Zn in the Azores Triple Junction hydrothermal vent field food chains

Abstract : In this work, mercury (Hg), copper (Cu) and zinc (Zn) concentrations and tissue distribution are determined in seven benthic invertebrates species (the key species) from the Mid Atlantic Ridge (MAR) hydrothermal vent fields. The samples were collected from three hydrothermal vent fields - Menez Gwen, 840 m; Lucky Strike, 1700 m and Rainbow, 2300 m - near the Azores Triple Junction. These fields are characterized by different depths, geological context and chemical composition of the hydrothermal fluid, particularly the metal content, which is reflected by the metal concentrations in the organisms. Indeed, our results show that organisms from Menez Gwen presented the highest Hg concentrations, while those from Lucky Strike and Rainbow were richer in Cu and Zn. The potential transfer of these metals through two trophic links are also evaluated and include (1) the mussel Bathymodiolus azoricus and the commensal worm Branchipolynoe seepensis, and (2) three different species of shrimps and the crab Segonzacia mesatlantica. No evidence of Hg biomagnifications in either of the vent food chains is clearly observed but an increase in Hg accumulation from prey to predator in the crustacean food chain. The same pattern was observed for Cu and Zn, even though these metals are not known to be generally biomagnified in food chains.
Type de document :
Article dans une revue
Chemosphere, Elsevier, 2006, 65 (11), pp.2260-2267. 〈10.1016/j.chemosphere.2006.05.034〉
Liste complète des métadonnées

Littérature citée [38 références]  Voir  Masquer  Télécharger
Contributeur : Paco Bustamante <>
Soumis le : dimanche 13 mai 2012 - 13:05:58
Dernière modification le : jeudi 11 janvier 2018 - 06:23:34
Document(s) archivé(s) le : mardi 14 août 2012 - 02:20:55


Fichiers produits par l'(les) auteur(s)




Ana Colaco, Paco Bustamante, Yves Fouquet, Pierre-Marie Sarradin, R. Serrão-Santos. Bioaccumulation of Hg, Cu, and Zn in the Azores Triple Junction hydrothermal vent field food chains. Chemosphere, Elsevier, 2006, 65 (11), pp.2260-2267. 〈10.1016/j.chemosphere.2006.05.034〉. 〈hal-00696673〉



Consultations de la notice


Téléchargements de fichiers