{"refrec":{"BRefID":328431,"RR":"<b>Erdem, Z.; Schönfeld, J.; Rathburn, A.E.; Pérez, M.-E.; Cardich, J.; Glock, N.</b> (2020). Bottom-water deoxygenation at the Peruvian margin during the last deglaciation recorded by benthic foraminifera. <i>Biogeosciences 17(12)</i>: 3165-3182. <a href=\"https://dx.doi.org/10.5194/bg-17-3165-2020\" target=\"_blank\">https://dx.doi.org/10.5194/bg-17-3165-2020</a>","BEntID":321908,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>Biogeosciences 17(12)</i>: 3165-3182. <a href=\"https://dx.doi.org/10.5194/bg-17-3165-2020\" target=\"_blank\">https://dx.doi.org/10.5194/bg-17-3165-2020</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":0,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Erdem, Z.; Schönfeld, J.; Rathburn, A.E.; Pérez, M.-E.; Cardich, J.; Glock, N.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Erdem, Z. <i>et al.</i>","Englishabstract":"Deciphering the dynamics of dissolved oxygen in the mid-depth ocean during the last deglaciation is essential to understand the influence of climate change on modern oxygen minimum zones (OMZs). Many paleo-proxy records from the eastern Pacific Ocean indicate an extension of oxygen-depleted conditions during the deglaciation, but the degree of deoxygenation has not been quantified to date. The Peruvian OMZ, one of the largest OMZs in the world, is a key area to monitor such changes in near-bottom-water oxygenation in relation to changing climatic conditions. Here, we analysed the potential to use the composition of foraminiferal assemblages from the Peruvian OMZ as a quantitative redox proxy. A multiple regression analysis was applied to a joint dataset of living (rose-bengal-stained, fossilizable calcareous species) benthic foraminiferal distributions from the Peruvian continental margin. Bottom-water oxygen concentrations ([O<sub>2</sub>]<sub>BW</sub>) during sampling were used as the dependant variable. The correlation was significant (<I>R</I><SUP>2</SUP>=0.82; p<0.05), indicating that the foraminiferal assemblages are rather governed by oxygen availability than by the deposition of particulate organic matter (<I>R</I><SUP>2</SUP>=0.53; p=0.31). We applied the regression formula to three sediment cores from the northern part of the Peruvian OMZ between 3 and 8∘ S and 997 and 1250 m water depth, thereby recording oxygenation changes at the lower boundary of the Peruvian OMZ. Each core displayed a similar trend of decreasing oxygen levels since the Last Glacial Maximum (LGM). The overall [O<sub>2</sub>]<sub>BW</sub> change from the LGM and the Holocene was constrained to 30 µmol kg<sup>−1</sup> at the lower boundary of the OMZ.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Bottom-water deoxygenation at the Peruvian margin during the last deglaciation recorded by benthic foraminifera","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":2020,"MonPub":null,"DateUpdate":"2020-09-02","DateCreate":"2020-09-02","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000543726600001","VABBcode":null,"OpenAcc":1,"DOI":"10.5194/bg-17-3165-2020"},"refs":null,"anarec":{"AnaID":328431,"PubliDate":2020,"Pagination":"3165-3182","XtraPublOfAnaID":null,"ISBN":null,"Volume":"17","Issue":"12","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":68092,"SerRR":"<b>Gattuso, J.P.; Kesselmeier, J. (Ed.)</b> Biogeosciences. Copernicus Publications: Göttingen.  ISSN 1726-4170; e-ISSN 1726-4189","StandardTitleSer":"Biogeosciences","ISSN":"1726-4170","AbbrevSer":"Biogeosciences","StandardTitleMon":null,"StartPage":3165,"Pages":18,"ToPubliDate":null,"BRefBibLvlCode":"S","SerNotes":null},"monrec":null,"serrec":null,"relations":null,"relationsRev":null,"addrec":null,"othpubs":null,"ownerships":null,"authors":[{"AutName":"Erdem","Firstname":"Zeynep","Initials":"Z.","Affiliation":"MMB","Discriminator":null,"CorporateFlag":0,"BEntID":321908,"AutID":245916,"OrderNr":1,"DegrID":null,"EditorFlag":0,"CorrespFlag":0,"IllustratorFlag":0,"ReviserFlag":0,"TranslatorFlag":0,"InsAcronym":"MMB","InsFSN":"Koninklijk Nederlands Instituut voor Onderzoek der Zee; Marine Microbiology and 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