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dc.contributor.authorSchaanning, M.nb_NO
dc.contributor.authorTrannum, H.nb_NO
dc.contributor.authorØxnevad, S.nb_NO
dc.contributor.otherSchaanning, M. - Project managernb_NO
dc.date.accessioned2014-08-01T10:50:56Z
dc.date.available2014-08-01T10:50:56Z
dc.date.issued2007nb_NO
dc.identifier5342nb_NO
dc.identifier.isbn82-577-5077-8nb_NO
dc.identifier.issn1894-7948nb_NO
dc.identifier.urihttp://hdl.handle.net/11250/213478
dc.descriptionÅrsliste 2006nb_NO
dc.description.abstractA three months simulated seabed experiment on water- and olefin-based drill cuttings has been performed at NIVAs Marine Research Station at Solbergstrand. Twelve box-core samples were transferred from 200 m depth in the outer Oslofjord and treated with 2-4 mm layers of cuttings or sediment particles from the fjord location. In treatments with olefin-based cuttings, microelectrode profiles showed reduced penetration of O2 into the cuttings layer, and the consumption of O2 from the overlying water increased after an initial lag phase of 2-3 weeks. The initial (field) structure of the macrobenthic communities was maintained throughout the experimental period, and at community level, no significant difference was observed between treatments at the end of the exposure period. However, three taxa showed reduced abundances in boxes treated with water- and olefin-based cuttings compared with untreated boxes and boxes treated with sediment particles. The effect could not be assigned to olefins or any of the weight materials ilmenite (present in the water-based cuttings) and barite (present in the olefin-based cuttings). Toxic effects of other mud components could not be entirely ruled out, but size or shape of cuttings particles appeared to be a more likely common factor responsible for the observed impact of both types of cuttings.nb_NO
dc.description.sponsorshipAkvaplan-niva AS,nb_NO
dc.publisherNorsk institutt for vannforskningnb_NO
dc.relation.ispartofseriesNIVA-rapport;5342nb_NO
dc.rightsNavngivelse-IkkeKommersiell-DelPåSammeVilkår 3.0 Norgenb_NO
dc.rights.urihttp://creativecommons.org/licenses/by-nc-sa/3.0/no/nb_NO
dc.subjectmiljøgifter - marintnb_NO
dc.titleA mesocoms experiment on the impacts of water- and olefin-based drill cuttings on benthic communitiesnb_NO
dc.typeResearch reportnb_NO
dc.rights.holderNorsk institutt for vannforskning/Norwegian institute for water researchnb_NO
dc.subject.nsiVDP::Matematikk og naturvitenskap: 400nb_NO
dc.source.pagenumber53nb_NO
dc.subject.keywordmarine sedimenternb_NO
dc.subject.keywordmiljøpåvirkningnb_NO
dc.subject.keywordbunnfaunanb_NO
dc.subject.keyworddrilling mudnb_NO
dc.subject.keywordmarine sedimentsnb_NO
dc.subject.keywordenvironmental effectsnb_NO
dc.subject.keywordbenthic faunanb_NO
dc.relation.projectO-25213nb_NO


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