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dc.contributor.authorBauch, D
dc.contributor.authorDarling, K
dc.contributor.authorSimstich, J
dc.contributor.authorBauch, HA
dc.contributor.authorErlenkeuser, H
dc.contributor.authorKroon, Dick
dc.coverage.spatial4en
dc.date.accessioned2005-02-08T11:11:05Z
dc.date.available2005-02-08T11:11:05Z
dc.date.issued17/07/2003
dc.identifier.citationBauch D, Darling K, Simstich J, Bauch HA, Erlenkeuser H, Kroon D, NATURE, 424 (6946): 299-302 JUL 17 2003en
dc.identifier.uridoi:10.1038/nature01778.
dc.identifier.uriwww.nature.com/nature
dc.identifier.urihttp://hdl.handle.net/1842/680
dc.description.abstractThe shells of the planktonic foraminifer Neogloboquadrina pachyderma have become a classical tool for reconstructing glacial-interglacial climate conditions in the North Atlantic Ocean1-3. Palaeoceanographers utilize its left- and right-coiling variants, which exhibit a distinctive reciprocal temperature and water mass related shift in faunal abundance both at present and in late Quaternary sediments1,2,4,5. Recently discovered cryptic genetic diversity in planktonic foraminifers6-8 now poses signifi- cant questions for these studies. Here we report genetic evidence demonstrating that the apparent 'single species' shell-based records of right-coiling N. pachyderma used in palaeoceanographic reconstructions contain an alternation in species as environmental factors change. This is reflected in a speciesdependent incremental shift in right-coiling N. pachyderma shell calcite d 18O between the Last Glacial Maximum and full Holocene conditions. Guided by the percentage dextral coiling ratio, our findings enhance the use of d 18O records of rightcoiling N. pachyderma for future study. They also highlight the need to genetically investigate other important morphospecies to refine their accuracy and reliability as palaeoceanographic proxies.en
dc.format.extent401170 bytes
dc.format.mimetypeapplication/pdf
dc.language.isoen
dc.publisherNature Publishing Groupen
dc.subjectPalaeoceanographicen
dc.subjectgenetic variationen
dc.subjectNorth Atlanticen
dc.subjectNeogloboquadrinaen
dc.subjectpachydermaen
dc.subjectForaminiferaen
dc.titlePalaeoceanographic implications of genetic variation in living North Atlantic Neogloboquadrina pachydermaen
dc.typeArticleen


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