{"refrec":{"BRefID":59388,"RR":"<b>Schiedek, D.</b> (1998). Ecophysiological capacity of <i>Marenzelleria</i> populations inhabiting North Sea estuaries. <i>Helgol. Meeresunters. 52</i>: 373-382. <a href=\"http://dx.doi.org/10.1007/BF02908911\" target=\"_blank\">http://dx.doi.org/10.1007/BF02908911</a>","BEntID":56978,"PublicFlag":1,"CheckedFlag":0,"wosflag":null,"vabbflag":null,"RefStringPartII":". <i>Helgol. Meeresunters. 52</i>: 373-382. <a href=\"http://dx.doi.org/10.1007/BF02908911\" target=\"_blank\">http://dx.doi.org/10.1007/BF02908911</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Schiedek, D.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Schiedek, D.","Englishabstract":"The metabolic responses of <i>Marenzelleria</i> cf. <i>wireni</i>, a newly established polychaete worm within North Sea estuaries, to various kinds of environmental stress are summarised. With respect to salinity, <i>M.</i> cf. <i>wireni</i> is able to deal with variations within a wide range. In the process of osmotic acclimation, free amino acids are involved. The major amino acid in terms of osmotic effector is glycine, followed by alanine. Under severe hypoxia, <i>M.</i> cf. <i>wireni</i> switches to an anaerobic metabolism, but at a very low oxygen partial pressure (&lt;3 kPa), which indicates efficient utilisation of oxygen. Anaerobic energy production occurs predominantly via the succinate-propionate pathway. When exposed to hydrogen sulphide, <i>M.</i> cf. <i>wireni</i> is able to cope with high sulphide concentrations (up to 3 mmol l<sup>−1</sup>), but the pattern of end products of the anaerobic energy metabolism changes. In terms of sulphide tolerance, <i>M.</i> cf. <i>wireni</i> probably is even better adapted than other, indigenous polychaetes. However, in comparison with the sibling species <i>Marenzelleria viridis</i>, which appeared at the same time in European waters but mainly inhabits the coastal inlets of the Baltic Sea in high numbers, the metabolic capabilities of <i>M.</i> cf. <i>wireni</i> seem to be more limited at higher sulphide concentrations (>1 mmol l<sup>−1</sup>). This might have an influence on the distribution pattern of the two sibling species.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Ecophysiological capacity of <i>Marenzelleria</i> populations inhabiting North Sea estuaries","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-04-22 01:31:29.914350","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":null,"OtherDescriptors":null,"Notes":null,"AnaPub":1998,"MonPub":null,"DateUpdate":"2017-02-27","DateCreate":"2004-04-14","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000080775700015","VABBcode":null,"OpenAcc":0,"DOI":"10.1007/BF02908911"},"refs":null,"anarec":{"AnaID":59388,"PubliDate":1998,"Pagination":"373-382","XtraPublOfAnaID":null,"ISBN":null,"Volume":"52","Issue":null,"BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":43116,"SerRR":"Helgoländer Meeresuntersuchungen. 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