Reference : Tracing sewage and natural freshwater input in a Northwest Mediterranean bay: Evidenc...
Scientific journals : Article
Life sciences : Aquatic sciences & oceanology
Life sciences : Environmental sciences & ecology
Tracing sewage and natural freshwater input in a Northwest Mediterranean bay: Evidence obtained from isotopic ratios in marine organisms
Lassauque, Julien [Université de Nice Sophia Antipolis, Nice, France > ECOMERS > > >]
Lepoint, Gilles mailto [Université de Liège - ULiège > Département des sciences et gestion de l'environnement > Océanologie >]
Thibaut, T. [Université de Nice Sophia Antipolis, Nice, France > ECOMERS > > >]
Francour, Patrice [Université de Nice Sophia Antipolis, Nice, France > ECOMERS > > >]
Meinesz, A. [Université de Nice Sophia Antipolis, Nice, France > ECOMERS > > >]
Marine Pollution Bulletin
Yes (verified by ORBi)
United Kingdom
[en] coastal pollution ; stable isotopes ; posidonia ; Mediterranean ; mussel caging ; Cannes
[en] Elemental carbon and nitrogen levels and isotope ratios were assessed in different biological compartments of a Northwest (NW) Mediterranean bay to trace the various sources of nutrient input from natural (river runoffs) and anthropogenic (harbor outflows, fish farms and urban sewage outfall) sources. Samples from transplanted mussels and natural sea grass communities (Posidonia oceanica leaves and epiphytes) were harvested from different locations throughout the bay during the touristic summer and rainy seasons. The results from the nitrogen analysis revealed that sewage and harbor outflow promote higher nitrogen levels, enrichment of N-15 in the tissues, and a higher seasonal variability in sea grass and epiphytes. In mussel tissues, the delta N-15 was also influenced by sewage and harbor outflow, whereas delta C-13 was influenced by terrestrial inputs. These results suggest that natural and anthropogenic nutrient inputs have a temporary and localized influence and affect the sensitivity of natural isotopic ratios to changes in hydrologic conditions, especially to rain and tourism. (C) 2010 Elsevier Ltd. All rights reserved.
Université de Sophia Antipolis ; Centre Interfacultaire de Recherches en Océanologie - MARE
Lyonnaise des Eaux (France)
Researchers ; Professionals ; Students
ERRATUM: for Delta value: read per mille (‰), not percent (%) (CORRECTED IN OCR VERSION).

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