Article (Scientific journals)
Tracing sewage and natural freshwater input in a Northwest Mediterranean bay: Evidence obtained from isotopic ratios in marine organisms
Lassauque, Julien; Lepoint, Gilles; Thibaut, T. et al.
2010In Marine Pollution Bulletin, 60 (6), p. 843-851
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Keywords :
coastal pollution; stable isotopes; posidonia; Mediterranean; mussel caging; Cannes
Abstract :
[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.
Research center :
Université de Sophia Antipolis
MARE - Centre Interfacultaire de Recherches en Océanologie - ULiège
Disciplines :
Aquatic sciences & oceanology
Environmental sciences & ecology
Author, co-author :
Lassauque, Julien;  Université de Nice Sophia Antipolis, Nice, France > ECOMERS
Lepoint, Gilles  ;  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
Language :
English
Title :
Tracing sewage and natural freshwater input in a Northwest Mediterranean bay: Evidence obtained from isotopic ratios in marine organisms
Publication date :
2010
Journal title :
Marine Pollution Bulletin
ISSN :
0025-326X
Publisher :
Pergamon, Oxford, United Kingdom
Volume :
60
Issue :
6
Pages :
843-851
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
Lyonnaise des Eaux (France)
Commentary :
ERRATUM: for Delta value: read per mille (‰), not percent (%) (CORRECTED IN OCR VERSION).
Available on ORBi :
since 13 December 2010

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