title: Effects of sediment contamination on physiological and biochemical responses of the polychaete Diopatra neapolitana, an exploited natural resource.
abstract: The present study reports metal and arsenic contamination in sediments, as well as element accumulation and partitioning in the polychaete Diopatra neapolitana in the Ria de Aveiro lagoon (Portugal). The polychaetes biochemical performance and tissue regenerative capacity were also evaluated. The concentration of elements in sediments showed an increase of contamination among areas (areas A-G), but higher bioaccumulation was observed in organisms from a less contaminated area (area C, BAF>1). This study evidenced that individuals with higher elements bioaccumulation presented higher LPO and lower GSH/GSSG and also exhibited lower capacity for body regeneration. Polychaetes biotransformation capacity as well as antioxidant defense mechanisms were not sufficiently efficient to withstand the excess of ROS leading to increased LPO when organisms presented higher bioaccumulation levels. Additionally, an increase of methalotionines was also observed in individuals with higher bioaccumulation of metals and As, suggesting an induction of detoxification processes.
authors.affiliation: Department of Biology & CESAM, University of Aveiro, Aveiro, Portugal. Electronic address: adilia@ua.pt.
authors.forename: Adília
authors.initials: A
authors.lastname: Pires
authors.affiliation: Department of Biology & CESAM, University of Aveiro, Aveiro, Portugal.
authors.forename: Cátia
authors.initials: C
authors.lastname: Velez
authors.affiliation: Department of Biology & CESAM, University of Aveiro, Aveiro, Portugal.
authors.forename: Etelvina
authors.initials: E
authors.lastname: Figueira
authors.affiliation: Department of Biology & CESAM, University of Aveiro, Aveiro, Portugal.
authors.forename: Amadeu M V M
authors.initials: AMVM
authors.lastname: Soares
authors.affiliation: Department of Biology & CESAM, University of Aveiro, Aveiro, Portugal.
authors.forename: Rosa
authors.initials: R
authors.lastname: Freitas
mesh_terms: D000818:Animals; D001151:Arsenic / Q000032:analysis* / Q000493:pharmacokinetics / Q000633:toxicity; D015415:Biomarkers; D019015:Geologic Sediments; D000067936:Natural Resources; D018384:Oxidative Stress; D011077:Polychaeta / Q000254:growth & development*; D011174:Portugal; D014873:Water Pollutants / Q000032:analysis* / Q000493:pharmacokinetics / Q000633:toxicity; D014874:Water Pollutants, Chemical
chemical_list: D015415:Biomarkers; D014873:Water Pollutants; D014874:Water Pollutants, Chemical; D001151:Arsenic
keywords: Biomarkers; Metals and as; Polychaetes; Regeneration; Ria de Aveiro; Sediment contamination