Different carbon sources affect PCB accumulation by marine bivalves

LAITANO MARÍA VICTORIA; SILVA BARNI, MARÍA FLORENCIA; GOMES COSTA, PATRICIA; CLEDÓN, MAXIMILIANO; FILLMANN, GILBERTO; MIGLIORANZA, SILVIA KARINA BEATRIZ; PANARELLO, HÉCTOR

MARINE ENVIRONMENTAL RESEARCH

ELSEVIER SCI LTD

Lugar: Amsterdam; Año: 2015 vol. 113 p. 62 - 69

0141-1136

Pampean creeks were evaluated in the present study as potential land-based sources of PCB marinecontamination. Different carbon and nitrogen sources from such creeks were analysed as boosters of PCBbioaccumulation by the filter feeder bivalve Brachidontes rodriguezii and grazer limpet Siphonaria lessoni.Carbon of different source than marine and anthropogenic nitrogen assimilated by organisms wereestimated through their C and N isotopic composition. PCB concentration in surface sediments andmollusc samples ranged from 2.68 to 6.46 ng g1 (wet weight) and from 1074 to 4583 ng g1 lipid,respectively, reflecting a punctual source of PCB contamination related to a landfill area. Thus, despite thelow 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 uptakewhich highlights the importance to consider this factor when studying PCB distribution in organisms ofcoastal systems.