title: Different carbon sources affect PCB accumulation by marine bivalves.
abstract: Pampean creeks were evaluated in the present study as potential land-based sources of PCB marine contamination. Different carbon and nitrogen sources from such creeks were analysed as boosters of PCB bioaccumulation by the filter feeder bivalve Brachidontes rodriguezii and grazer limpet Siphonaria lessoni. Carbon of different source than marine and anthropogenic nitrogen assimilated by organisms were estimated through their C and N isotopic composition. PCB concentration in surface sediments and mollusc samples ranged from 2.68 to 6.46 ng g(-1) (wet weight) and from 1074 to 4583 ng g(-1) lipid, respectively, reflecting a punctual source of PCB contamination related to a landfill area. Thus, despite the low flow of creeks, they should not be underestimated as contamination vectors to the marine environment. On the other hand, mussels PCB bioaccumulation was related with the carbon source uptake which highlights the importance to consider this factor when studying PCB distribution in organisms of coastal systems.
authors.affiliation: IIMyC, Instituto de Investigaciones Marinas y Costeras, CONICET-FCEN, Universidad Nacional de Mar del Plata, Funes 3350, Mar del Plata 7600, Provincia de Buenos Aires, Argentina. Electronic address: vlaitano@mdp.edu.ar.
authors.forename: M V
authors.initials: MV
authors.lastname: Laitano
authors.affiliation: Laboratorio de Ecotoxicología y Contaminación Ambiental, IIMyC, Argentina.
authors.forename: M F
authors.initials: MF
authors.lastname: Silva Barni
authors.affiliation: Laboratório de Microcontaminantes Orgânicos e Ecotoxicologia Aquática (CONECO), Instituto de Oceanografia, Universidade Federal do Rio Grande, Rio Grande, RS 96203-900, Brazil.
authors.forename: P G
authors.initials: PG
authors.lastname: Costa
authors.affiliation: IIMyC, Instituto de Investigaciones Marinas y Costeras, CONICET-FCEN, Universidad Nacional de Mar del Plata, Funes 3350, Mar del Plata 7600, Provincia de Buenos Aires, Argentina.
authors.forename: M
authors.initials: M
authors.lastname: Cledón
authors.affiliation: Laboratório de Microcontaminantes Orgânicos e Ecotoxicologia Aquática (CONECO), Instituto de Oceanografia, Universidade Federal do Rio Grande, Rio Grande, RS 96203-900, Brazil.
authors.forename: G
authors.initials: G
authors.lastname: Fillmann
authors.affiliation: Laboratorio de Ecotoxicología y Contaminación Ambiental, IIMyC, Argentina.
authors.forename: K S B
authors.initials: KS
authors.lastname: Miglioranza
authors.affiliation: INGEIS, Instituto de Geocronología y Geología Isotópica, CONICET-UBA, Universidad Nacional de Buenos Aires, Pabellón INGEIS, Ciudad Universitaria, 1428 Buenos Aires, Argentina.
authors.forename: H O
authors.initials: HO
authors.lastname: Panarello
mesh_terms: D000818:Animals; D049872:Bivalvia / Q000737:chemistry / Q000378:metabolism*; D002244:Carbon / Q000737:chemistry / Q000378:metabolism*; D002247:Carbon Isotopes; D009584:Nitrogen / Q000737:chemistry; D009587:Nitrogen Isotopes; D011078:Polychlorinated Biphenyls
chemical_list: D002247:Carbon Isotopes; D009587:Nitrogen Isotopes; D002244:Carbon; D011078:Polychlorinated Biphenyls; D009584:Nitrogen
keywords: Bioaccumulation; Creeks; Marine molluscs; Organic matter; PCB; Stable isotopes