Article (Scientific journals)
Organochlorine pollution in tropical rivers (Guadeloupe): Role of ecological factors in food web bioaccumulation
Coat, Sophie; Monti, Dominique; Legendre, Pierre et al.
2011In Environmental Pollution, 159, p. 1692-1701
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Keywords :
stable isotope; Organochlorines; Bioaccumulation; Freshwater; food web
Abstract :
[en] Concentrations of organochlorine pesticides and stable isotope ratios of nitrogen and carbon were measured in a tropical freshwater ecosystem to evaluate the contamination level of biota and examine the bioaccumulation patterns of pollutants through the food web. Chemical analyses showed a general and heavy contamination of the entire food web. They revealed the strong accumulation of pollutants by juveniles of diadromous fishes and shrimps, as they re-enter the river. The role of ecological factors in the bioaccumulation of pesticides was evaluated. Whereas the most persistent pollutants (chlordecone and monohydro-chlordecone) were related to the organisms diet and habitat, bioaccumulation of b-HCH was only influenced by animal lipid content. The biomagnification potential of chlordecone through the food chain has been demonstrated. It highlighted the importance of trophic transfer in this compound bioaccumulation process. In contrast, bioconcentration by passive diffusion from water seemed to be the main exposure route of biota to b-HCH.
Research center :
MARE - Centre Interfacultaire de Recherches en Océanologie - ULiège
Dynecar - Université Antilles Guyane
Disciplines :
Aquatic sciences & oceanology
Environmental sciences & ecology
Author, co-author :
Coat, Sophie;  Université des Antilles et de la Guyane > Dynamique des Ecosystème Carribéens DYNECAR > Laboratoire de Biologie Marine
Monti, Dominique;  Université des Antilles et de la Guyane > Dynamique des Ecosystème Carribéens DYNECAR > Biologie Marine
Legendre, Pierre;  Université de Montréal - UdeM > Sciences Biologique
Bouchon, Claude;  Université des Antilles et de la Guyane > Dynamique des Ecosystème Carribéens DYNECAR > Biologie Marine
Massat, Félix;  laboratoire Départemental d’Analyses de la Drôme
Lepoint, Gilles  ;  Université de Liège - ULiège > Département des sciences et gestion de l'environnement > Océanologie
Language :
English
Title :
Organochlorine pollution in tropical rivers (Guadeloupe): Role of ecological factors in food web bioaccumulation
Publication date :
2011
Journal title :
Environmental Pollution
ISSN :
0269-7491
eISSN :
1873-6424
Publisher :
Elsevier Science, Oxford, United Kingdom
Volume :
159
Pages :
1692-1701
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
Direction Régionale de l’Environnement de la Guadeloupe
Commentary :
Linked papers: Coat et al. 2009 and Lefrançois et al. 2010
Available on ORBi :
since 16 May 2011

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