{"refrec":{"BRefID":210755,"RR":"<b>Zetsche, E.; Thornton, B.; Midwood, A.J.; Witte, U.</b> (2011). Utilisation of different carbon sources in a shallow estuary identified through stable isotope techniques. <i>Cont. Shelf Res. 31(7-8)</i>: 832-840. <a href=\"http://dx.doi.org/10.1016/j.csr.2011.02.006\" target=\"_blank\">dx.doi.org/10.1016/j.csr.2011.02.006</a>","BEntID":202677,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>Cont. Shelf Res. 31(7-8)</i>: 832-840. <a href=\"https://dx.doi.org/10.1016/j.csr.2011.02.006\" target=\"_blank\">https://dx.doi.org/10.1016/j.csr.2011.02.006</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Zetsche, E.; Thornton, B.; Midwood, A.J.; Witte, U.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Zetsche, E. <i>et al.</i>","Englishabstract":"Organic carbon in estuarine sediments can have many different sources. Terrestrial, riverine, estuarine and marine C pools may all contribute to and influence the organic C (C<sub>org</sub>) inventory of the estuarine sediments and the differing stable isotope signatures of the sources are reflected in the sediment's overall <sup>13</sup>C content. Ecological interpretations of sedimentary isotope data may, however, be limited by the fact the total C<sub>org</sub> inventory of a sediment may not be an accurate representation of the fraction that is labile and being actively turned over by the sedimentary community. To gain a better understanding of sedimentary C<sub>org</sub> dynamics in estuaries and the relationship between the sedimentary C pool and the C<sub>org</sub> undergoing mineralisation, we studied three components of an estuarine system: (1) the sedimentary C<sub>org</sub> inventory on a transect from the mouth to the upper end of the estuary, (2) temporal changes of sedimentary C<sub>org</sub> at one station throughout a year, and (3) the d<sup>13</sup>C of respired CO<sub>2</sub> compared to the d<sup>13</sup>C of available source material and sedimentary C<sub>org</sub> in a novel application of methods developed for soil science. Our experiments demonstrated that material of marine origin dominated the studied estuary. At the time-series station, material of marine origin dominated the sedimentary C<sub>org</sub> throughout the 1-yr study period. d<sup>13</sup>C values of CO<sub>2</sub> released from the sediment differed significantly from the sedimentary C<sub>org</sub> inventory at all study sites, but also clearly reflected differences between the main sections of the estuary. These results suggest that d<sup>13</sup>C measurements of respired CO<sub>2</sub> are promising as a tool to advance our understanding of C cycling in estuaries, and highlight that the sedimentary C<sub>org</sub> pool alone may not be a satisfactory indicator of OM utilisation in estuarine sediments.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Utilisation of different carbon sources in a shallow estuary identified through stable isotope techniques","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2024-12-10 01:33:17.368041","timezone_type":1,"timezone":"+01:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"Stable isotopes; Carbon; Sediment respiration; Intertidal; Organic","OtherDescriptors":null,"Notes":null,"AnaPub":2011,"MonPub":null,"DateUpdate":"2015-11-06","DateCreate":"2011-12-22","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000290422400007","VABBcode":null,"OpenAcc":0,"DOI":"10.1016/j.csr.2011.02.006"},"refs":null,"anarec":{"AnaID":210755,"PubliDate":2011,"Pagination":"832-840","XtraPublOfAnaID":null,"ISBN":null,"Volume":"31","Issue":"7-8","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":42769,"SerRR":"Continental Shelf Research. 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