title: Evaluating the contribution of ingested oil droplets to the bioaccumulation of oil components--a modeling approach.
abstract: The dietary uptake of oil droplets by aquatic organisms has been suggested as a possible exposure pathway for oil-related chemicals. We confronted two bioaccumulation models, one including and one neglecting oil droplet uptake, with measured polycyclic aromatic hydrocarbon (PAH) body burdens of five marine species. The model without oil droplet uptake was able to predict 75% of the observations within one order of magnitude. Total PAH body burdens were predicted within a factor of five. For most species, inclusion of oil droplet uptake did not improve model accuracy, suggesting a negligible contribution of oil droplet uptake to PAH bioaccumulation. Only for Mytilus edulis, model accuracy improved (up to five times) after the inclusion of oil droplet uptake. Our findings suggest filter feeding as a determinant for the PAH uptake via oil droplets, but more research is needed to test this hypothesis.
authors.affiliation: Ghent University, Laboratory of Environmental Toxicology and Aquatic Ecology, Plateaustraat 22, 9000 Ghent, Belgium. Electronic address: karel.viaene@ugent.be.
authors.forename: Karel P J
authors.initials: KP
authors.lastname: Viaene
authors.affiliation: Ghent University, Laboratory of Environmental Toxicology and Aquatic Ecology, Plateaustraat 22, 9000 Ghent, Belgium.
authors.forename: Colin R
authors.initials: CR
authors.lastname: Janssen
authors.affiliation: Radboud University Nijmegen, Institute for Water and Wetland Research, Department of Environmental Science, P.O. Box 9010, NL-6500 GL Nijmegen, The Netherlands.
authors.forename: Lisette
authors.initials: L
authors.lastname: de Hoop
authors.affiliation: Radboud University Nijmegen, Institute for Water and Wetland Research, Department of Environmental Science, P.O. Box 9010, NL-6500 GL Nijmegen, The Netherlands.
authors.forename: A Jan
authors.initials: AJ
authors.lastname: Hendriks
authors.affiliation: Namur University, Research Unit in Environmental and Evolutionary Ecology, Belgium.
authors.forename: Frederik
authors.initials: F
authors.lastname: De Laender
mesh_terms: D059001:Aquatic Organisms / Q000378:metabolism; D001822:Body Burden; D008954:Models, Biological; D008956:Models, Chemical; D010578:Petroleum / Q000032:analysis / Q000378:metabolism*; D059392:Petroleum Pollution; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis / Q000378:metabolism; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000378:metabolism*
chemical_list: D010578:Petroleum; D011084:Polycyclic Aromatic Hydrocarbons; D014874:Water Pollutants, Chemical
keywords: Bioaccumulation modeling; Dispersed oil; Oil spill; Polycyclic aromatic hydrocarbons