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Assessing foraminifera biomineralisation models through trace element data of cultures under variable seawater chemistry

Evans, David ; Müller, Wolfgang ; Erez, Jonathan

Geochimica et Cosmochimica Acta, 01 September 2018, Vol.236, pp.198-217 [Rivista Peer Reviewed]

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  • Titolo:
    Assessing foraminifera biomineralisation models through trace element data of cultures under variable seawater chemistry
  • Autore: Evans, David ; Müller, Wolfgang ; Erez, Jonathan
  • Descrizione: The process by which foraminifera precipitate calcite from seawater has received much attention, in part because a mechanistic basis for empirical calibrations between shell chemistry and environmental parameters is desirable given their widespread application in palaeoceanography. The incorporation of fluorescent membrane-impermeable molecules into the shell demonstrates that seawater, transported by vacuolisation, is present at the site of calcification. However, recent discussion has focused on whether the calcium required for chamber formation is sourced predominantly by transmembrane Ca transport (TMT), with seawater vacuolisation playing a passive role, or vice versa. This debate has arisen in part because of the need to explain the low Mg/Ca ratio of most foraminifera compared to inorganic calcite. Here, we present trace element data of Operculina ammonoides and Globigerinoides ruber, a high-Mg shallow benthic, and low-Mg planktonic species respectively, cultured under...
  • Fa parte di: Geochimica et Cosmochimica Acta, 01 September 2018, Vol.236, pp.198-217
  • Soggetti: Foraminifera ; Biomineralisation ; Vacuolisation ; Culturing ; Mg/Ca ; Foraminifera ; Biomineralisation ; Vacuolisation ; Culturing ; Mg/Ca ; Geology
  • Lingua: Inglese
  • Identificativo: ISSN: 0016-7037 ; E-ISSN: 1872-9533 ; DOI: 10.1016/j.gca.2018.02.048

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