Articles | Volume 12, issue 7
https://doi.org/10.5194/bg-12-2153-2015
https://doi.org/10.5194/bg-12-2153-2015
Research article
 | 
10 Apr 2015
Research article |  | 10 Apr 2015

Impact of seawater [Ca2+] on the calcification and calciteMg / Ca of Amphistegina lessonii

A. Mewes, G. Langer, S. Thoms, G. Nehrke, G.-J. Reichart, L. J. de Nooijer, and J. Bijma

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Short summary
A culture study with the benthic foraminifer Amphistegina lessonii was conducted at varying seawater [Ca2+] and constant [Mg2+]. Results showed optimum growth rates and test thickness at ambient seawater Mg/Ca and a calcite Mg/Ca which is controlled by the relative seawater ratio. Results support the conceptual biomineralization model by Nehrke et al. (2013); however, our refined flux-based model suggests transmembrane transport fractionation that is slightly weaker than expected.
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