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Biogeosciences An interactive open-access journal of the European Geosciences Union
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Volume 14, issue 13
Biogeosciences, 14, 3287–3308, 2017
https://doi.org/10.5194/bg-14-3287-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Biogeosciences, 14, 3287–3308, 2017
https://doi.org/10.5194/bg-14-3287-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 10 Jul 2017

Research article | 10 Jul 2017

Size-dependent response of foraminiferal calcification to seawater carbonate chemistry

Michael J. Henehan et al.

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Aldridge, D., Beer, C. J., and Purdie, D. A.: Calcification in the planktonic foraminifera Globigerina bulloides linked to phosphate concentrations in surface waters of the North Atlantic Ocean, Biogeosciences, 9, 1725–1739, https://doi.org/10.5194/bg-9-1725-2012, 2012.
Allison, N., Austin, W., Paterson, D., and Austin, H.: Culture studies of the benthic foraminifera Elphidium williamsoni: Evaluating pH, Δ[CO32−] and inter-individual effects on test Mg ∕ Ca, Chem. Geol., 274, 87–93, 2010.
Aurahs, R., Treis, Y., Darling, K., and Kucera, M.: A revised taxonomic and phylogenetic concept for the planktonic foraminifer species Globigerinoides ruber based on molecular and morphometric evidence, Mar. Micropaleontol., 79, 1–14, https://doi.org/10.1016/j.marmicro.2010.12.001, 2011.
Bach, L. T.: Reconsidering the role of carbonate ion concentration in calcification by marine organisms, Biogeosciences, 12, 4939–4951, https://doi.org/10.5194/bg-12-4939-2015, 2015.
Barker, S. and Elderfield, H.: Foraminiferal calcification response to glacial-interglacial changes in atmospheric CO2, Science, 297, 833–836, https://doi.org/10.1126/science.1072815, 2002.
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It is still unclear whether foraminifera (calcifying plankton that play an important role in cycling carbon) will have difficulty in making their shells in more acidic oceans, with different studies often reporting apparently conflicting results. We used live lab cultures, mathematical models, and fossil measurements to test this question, and found low pH does reduce calcification. However, we find this response is likely size-dependent, which may have obscured this response in other studies.
It is still unclear whether foraminifera (calcifying plankton that play an important role in...
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