{"refrec":{"BRefID":210699,"RR":"<b>Lepoint, G.; Dauby, P.; Fontaine, M.; Bouquegneau, J.M.; Gobert, S.</b> (2003). Carbon and nitrogen isotopic ratios of the seagrass <i>Posidonia oceanica</i>: Depth-related variations. <i>Bot. Mar. 46(6)</i>: 555-561. <a href=\"http://dx.doi.org/10.1515/BOT.2003.058\" target=\"_blank\">dx.doi.org/10.1515/BOT.2003.058</a>","BEntID":202621,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":null,"RefStringPartII":". <i>Bot. Mar. 46(6)</i>: 555-561. <a href=\"https://dx.doi.org/10.1515/BOT.2003.058\" target=\"_blank\">https://dx.doi.org/10.1515/BOT.2003.058</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Lepoint, G.; Dauby, P.; Fontaine, M.; Bouquegneau, J.M.; Gobert, S.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Lepoint, G. <i>et al.</i>","Englishabstract":"Nitrogen (d<sup>15</sup>N) and carbon (d<sup>13</sup>C) isotopic compositions of <i>Posidonia oceanic</i> were determined during three seasons along a bathymetric gradient (438 m depth).The d<sup>15</sup>N values are low (2.2+/-0.9%) and variable. They do not show any relation to depth or sampling dates. There is a significant difference between the d<sup>15</sup>N values of the youngest and the oldest leaves, probably as a result of N resorption and senescing during leaf ageing. The d<sup>13</sup>C values of young <i>Posidonia</i> leaves vary with depth, showing the relationship between d<sup>13</sup>C values and primary productivity rate, and the use of a bicarbonate/CO<sub>2</sub> mixture as an inorganic carbon source. The d<sup>13</sup>C values of the oldest <i>P. oceanic</i> leaves are depleted in <sup>13</sup>C compared to those of young leaves. This modification of the <sup>13</sup>C signatures in relation to leaf age is particularly important between 20 and 29 m depth. This modification could be related to photosynthetic rate change during ageing, but also to change in carbohydrate composition and content.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Carbon and nitrogen isotopic ratios of the seagrass <i>Posidonia oceanica</i>: Depth-related variations","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":"northwest Mediterranean Sea; Posidonia; seagrass; stable isotopes","OtherDescriptors":null,"Notes":null,"AnaPub":2003,"MonPub":null,"DateUpdate":"2012-02-01","DateCreate":"2011-12-22","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000186660600008","VABBcode":null,"OpenAcc":0,"DOI":"10.1515/BOT.2003.058"},"refs":null,"anarec":{"AnaID":210699,"PubliDate":2003,"Pagination":"555-561","XtraPublOfAnaID":null,"ISBN":null,"Volume":"46","Issue":"6","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":42293,"SerRR":"Botanica Marina. 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