{"refrec":{"BRefID":340034,"RR":"<b>Kodama, S.; Takayanagi, H.; Yoshii, K.; Nhu Ha, T.T.; Asami, R.; Abe, O.; Iryu, Y.</b> (2021). Carbon and oxygen isotope records of <i>Tridacna squamosa</i> shells from two different latitudes in the Ryukyu Islands. <i>Paleontological Research 25(2)</i>: 79-92. <a href=\"https://dx.doi.org/10.2517/2020pr003\" target=\"_blank\">https://dx.doi.org/10.2517/2020pr003</a>","BEntID":336669,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":0,"RefStringPartII":". <i>Paleontological Research 25(2)</i>: 79-92. <a href=\"https://dx.doi.org/10.2517/2020pr003\" target=\"_blank\">https://dx.doi.org/10.2517/2020pr003</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Kodama, S.; Takayanagi, H.; Yoshii, K.; Nhu Ha, T.T.; Asami, R.; Abe, O.; Iryu, Y.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Kodama, S. <i>et al.</i>","Englishabstract":"We report carbon (δ<sup>13</sup>C) and oxygen (δ<sup>18</sup>O) isotope records of two modern giant clam (<i>Tridacna squamosa</i>) shells from two sites (Ishigaki-jima and Okinoerabu-jima) at different latitudes in the Ryukyu Islands, Japan. The δ<sup>13</sup>C profiles of samples from the inner shell layer on cross-sections along the maximum growth axis display no ontogenetic trends or seasonal variations. This finding suggests that the calcification site is likely to be unaffected by CO<sub>2</sub> uptake and release resulting from the metabolic activity of the molluscan host and algal symbionts. The δ<sup>18</sup>O profiles show distinct seasonal cycles. After accounting for the influence of seawater δ<sup>18</sup>O, the time-series variations are consistent with variations in sea surface temperature, and the temperature dependency of oxygen isotope fractionation is nearly identical to previously published δ<sup>18</sup>O–temperature relationships for biogenic and synthetic aragonite. We conclude that δ<sup>18</sup>O records from pristine fossils of this species will enable accurate paleoenvironmental reconstructions at high temporal resolution.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Carbon and oxygen isotope records of <i>Tridacna squamosa</i> shells from two different latitudes in the Ryukyu Islands","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":null,"OtherDescriptors":null,"Notes":null,"AnaPub":2021,"MonPub":null,"DateUpdate":"2021-07-12","DateCreate":"2021-07-12","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000637601500002","VABBcode":null,"OpenAcc":0,"DOI":"10.2517/2020pr003"},"refs":null,"anarec":{"AnaID":340034,"PubliDate":2021,"Pagination":"79-92","XtraPublOfAnaID":null,"ISBN":null,"Volume":"25","Issue":"2","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":276012,"SerRR":"Paleontological Research: Tokyo.  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