title: Origin and distribution of polycyclic aromatic hydrocarbon pollution in sediment and fish from the biosphere reserve of Urdaibai (Bay of Biscay, Basque country, Spain).
abstract: The Urdaibai estuary is a UNESCO biosphere reserve impacted by recreational, agricultural and industrial activities. Polycyclic aromatic hydrocarbons (PAHs) are major pollutants in Urdaibai, and their control and the identification of their sources is central on the preservation of the area. Chemical analysis by GC-MS showed a significant pollution by PAHs in Urdaibai sediment samples, mainly from pyrolytic sources, with minor contributions from oil spills. Measurement of the dioxin-like activity using a yeast-based bioassay showed an excess of biological activity in sediment samples from the inner part of the estuary. Analysis of PAH metabolites in bile of thicklip grey mullet (Chelon labrosus) showed a large excess of 2-naphthol over 1-naphthol or 1-pyrenol, suggesting a specific contamination in the inner Urdaibai estuary by some industrial process. Therefore, the combination of these three techniques defined different PAH pollution sources in Urdaibai: a major pyrolytic origin, occasional oil spills, and specific industrial activities.
authors.affiliation: Department of Zoology and Cell Biology, University of the Basque Country, Basque Country, Spain.
authors.forename: Eunate
authors.initials: E
authors.lastname: Puy-Azurmendi
authors.forename: Asunción
authors.initials: A
authors.lastname: Navarro
authors.forename: Alba
authors.initials: A
authors.lastname: Olivares
authors.forename: Denise
authors.initials: D
authors.lastname: Fernandes
authors.forename: Elena
authors.initials: E
authors.lastname: Martínez
authors.forename: Miren
authors.initials: M
authors.lastname: López de Alda
authors.forename: Cinta
authors.initials: C
authors.lastname: Porte
authors.forename: Miren P
authors.initials: MP
authors.lastname: Cajaraville
authors.forename: Damià
authors.initials: D
authors.lastname: Barceló
authors.forename: Benjamin
authors.initials: B
authors.lastname: Piña
mesh_terms: D000818:Animals; D001646:Bile / Q000378:metabolism; D055884:Chemical Hazard Release; D004784:Environmental Monitoring; D008401:Gas Chromatography-Mass Spectrometry; D019015:Geologic Sediments / Q000737:chemistry*; D009284:Naphthols / Q000032:analysis / Q000378:metabolism; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis* / Q000378:metabolism; D011721:Pyrenes / Q000032:analysis / Q000378:metabolism; D018336:Receptors, Aryl Hydrocarbon / Q000378:metabolism; D023701:Smegmamorpha / Q000378:metabolism*; D013030:Spain; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000378:metabolism
chemical_list: D009284:Naphthols; D011084:Polycyclic Aromatic Hydrocarbons; D011721:Pyrenes; D018336:Receptors, Aryl Hydrocarbon; D014874:Water Pollutants, Chemical; C029350:1-naphthol; C033146:1-hydroxypyrene; C028405:2-naphthol