{"refrec":{"BRefID":77396,"RR":"<b>Daan, R.; van het Groenewoud, H.; de Jong, S.A.; Mulder, M.</b> (1992). Physico-chemical and biological features of a drilling site in the North Sea, 1 year after discharges of oil-contaminated drill cuttings. <i>Mar. Ecol. Prog. Ser. 91(1-3)</i>: 37-45","BEntID":72985,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>Mar. Ecol. Prog. Ser. 91(1-3)</i>: 37-45","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Daan, R.; van het Groenewoud, H.; de Jong, S.A.; Mulder, M.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Daan, R. <i>et al.</i>","Englishabstract":"In the framework of the Paris Convention for the prevention of marine pollution, the Dutch government initiated a research programme on environmental effects of discharges of contaminated drill cuttings from platforms in the North Sea. Chemical analyses of the sediment over a transect in the residual current direction revealed a clear gradient in contamination levels, with oil concentrations ranging from 250 to 450 mg kg super(-1) dry sediment within 250 m and gradually decreasing to <20 mg kg<sup>-1</sup>) beyond 750 m. Barium concentrations showed a similar pattern. Subtle biological effects, indicated by the absence of a very sensitive species (<i>Montacuta ferruginosa</i>), were found as far as 2 km from the discharge site. Abundance patterns of 2 other sensitive species (<i>Harpinia antennaria</i> and <i>Callianassa subterranea</i>) suggested environmental stress to occur up to 1 or 2 km. Within 750 m from the discharge site an increasing number of species, including the dominant <i>Amphiura filiformis</sup>, appeared to decrease in abundance, successively resulting in a reduced total macrofauna abundance and species richness. Typical opportunistic species were observed more frequently only within a radius of 250 m. An alternative measure of diversity ('relative macrofauna abundance') was introduced and its merits are discussed.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Physico-chemical and biological features of a drilling site in the North Sea, 1 year after discharges of oil-contaminated drill cuttings","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2025-07-02 08:33:14.980000","timezone_type":1,"timezone":"+00:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":1992,"MonPub":null,"DateUpdate":"2021-02-24","DateCreate":"2005-10-26","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":null,"VABBcode":null,"OpenAcc":1},"refs":null,"anarec":{"AnaID":77396,"PubliDate":1992,"Pagination":"37-45","XtraPublOfAnaID":null,"ISBN":null,"Volume":"91","Issue":"1-3","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":43354,"SerRR":"Marine Ecology Progress Series. 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