title: Alterations in the energy budget of Arctic benthic species exposed to oil-related compounds.
abstract: We studied cellular energy allocation (CEA) in three Arctic benthic species (Gammarus setosus (Amphipoda), Onisimus litoralis (Amphipoda), and Liocyma fluctuosa (Bivalvia)) exposed to oil-related compounds. The CEA biomarker measures the energy budget of organisms by biochemically assessing changes in energy available (carbohydrates, protein and lipid content) and the integrated energy consumption (electron transport system activity (ETS) as the cellular aspect of respiration). Energy budget was measured in organisms subjected to water-accommodated fraction (WAF) of crude oil and drill cuttings (DC) to evaluate whether these compounds affect the energy metabolism of the test species. We observed significantly lower CEA values and higher ETS activity in G. setosus subjected to WAF treatment compared to controls (p<or=0.03). Higher CEA value and lower cellular respiration were observed in O. litoralis exposed to DC compared to controls (p=0.02). No difference in the energy budget of L. fluctuosa was observed between the treatments (p>or=0.19). Different responses to oil-related compounds between the three test species are likely the result of differences in feeding and burrowing behavior and species-specific sensitivity to petroleum-related compounds.
authors.affiliation: Akvaplan-niva, Polar Environmental Center, N-9296 Tromsø, Norway. gho@akvaplan.niva.noph <gho@akvaplan.niva.noph>
authors.forename: Gro Harlaug
authors.initials: GH
authors.lastname: Olsen
authors.forename: Eirin
authors.initials: E
authors.lastname: Sva
authors.forename: JoLynn
authors.initials: J
authors.lastname: Carroll
authors.forename: Lionel
authors.initials: L
authors.lastname: Camus
authors.forename: Wim
authors.initials: W
authors.lastname: De Coen
authors.forename: Roel
authors.initials: R
authors.lastname: Smolders
authors.forename: Helene
authors.initials: H
authors.lastname: Øveraas
authors.forename: Ketil
authors.initials: K
authors.lastname: Hylland
mesh_terms: D033304:Amphipoda / Q000187:drug effects* / Q000378:metabolism; D000818:Animals; D001110:Arctic Regions; D049872:Bivalvia / Q000187:drug effects* / Q000378:metabolism; D004579:Electron Transport / Q000187:drug effects; D004734:Energy Metabolism / Q000187:drug effects*; D010578:Petroleum / Q000633:toxicity*; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis; D014874:Water Pollutants, Chemical / Q000633:toxicity*
chemical_list: D010578:Petroleum; D011084:Polycyclic Aromatic Hydrocarbons; D014874:Water Pollutants, Chemical