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Título

Comparative bioaccumulation kinetics of trace elements in Mediterranean marine sponges

AutorGenta-Jouve, Grégory; Cachet, Nadja; Oberhänsli, François; Noyer, Charlotte ; Teyssié, Jean-Louis; Thomas, Olivier P.; Lacoue-Labarthe, Thomas
Palabras claveBiomonitor
Demosponge
Metal
Radionuclide
Radiotracer
Uptake
Fecha de publicación2012
EditorElsevier
CitaciónChemosphere 89 : 340-349 (2012)
ResumenWhile marine organisms such as bivalves, seagrasses and macroalgae are commonly used as biomonitors for the environment pollution assessment, widely distributed sponges received little attention as potential helpful species for monitoring programmes. In this study, the trace element and radionuclide bioaccumulation and retention capacities of some marine sponges were estimated in a species-comparative study using radiotracers technique. Six Mediterranean species were exposed to background dissolved concentrations of 110mAg, 241Am, 109Cd, 60Co, 134Cs, 54Mn, 75Se and 65Zn allowing the assessment of the uptake and depuration kinetics for selected elements. Globally, massive demosponges Agelas oroides, Chondrosia reniformis and Ircinia variabilis displayed higher concentration factor (CF) than the erectile ones (Acanthella acuta, Cymbaxinella damicornis, Cymbaxinella verrucosa) at the end of exposure, suggesting that the morphology is a key factor in the metal bioaccumulation efficiency. Considering this observation, two exceptions were noted: (1) A. acuta reached the highest CF for 110mAg and strongly retained the accumulated metal without significant Ag loss when placed in depuration conditions and (2) C. reniformis did not accumulate Se as much as A. oroides and I. variabilis. These results suggest that peculiar metal uptake properties in sponges could be driven by specific metabolites or contrasting biosilification processes between species, respectively. This study demonstrated that sponges could be considered as valuable candidate for biomonitoring metal contamination but also that there is a need to experimentally highlight metal-dependant characteristic among species.
Descripción10 páginas, 2 tablas, 2 figuras.
Versión del editorhttp://dx.doi.org/10.1016/j.chemosphere.2012.04.052
URIhttp://hdl.handle.net/10261/131686
DOI10.1016/j.chemosphere.2012.04.052
ISSN0045-6535
E-ISSN1879-1298
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