Articles | Volume 16, issue 18
https://doi.org/10.5194/bg-16-3565-2019
https://doi.org/10.5194/bg-16-3565-2019
Research article
 | 
20 Sep 2019
Research article |  | 20 Sep 2019

Environmental and biological controls on Na∕Ca ratios in scleractinian cold-water corals

Nicolai Schleinkofer, Jacek Raddatz, André Freiwald, David Evans, Lydia Beuck, Andres Rüggeberg, and Volker Liebetrau

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Cited articles

Adkins, J. F., Boyle, E. A., Curry, W. B., and Lutringer, A.: Stable isotopes in deep-sea corals and a new mechanism for “vital effects”, Geochim. Cosmochim. Ac., 67, 1129–1143, https://doi.org/10.1016/S0016-7037(02)01203-6, 2003. 
Al-Horani, F. A., Al-Moghrabi, S. M., and De Beer, D.: The mechanism of calcification and its relation to photosynthesis and respiration in the scleractinian coral Galaxea fascicularis, Mar. Biol., 142, 419–426, https://doi.org/10.1007/s00227-002-0981-8, 2003. 
Allemand, D., Tambutté, É., Zoccola, D. and Tambutté, S.: Coral Calcification, Cells to Reefs, in: Coral Reefs: An Ecosystem in Transition, pp. 119–150, Springer, Dordrecht, the Netherlands, 2011. 
Allen, K. A., Hönisch, B., Eggins, S. M., Haynes, L. L., Rosenthal, Y., and Yu, J.: Trace element proxies for surface ocean conditions: A synthesis of culture calibrations with planktic foraminifera, Geochim. Cosmochim. Ac., 193, 197–221, https://doi.org/10.1016/j.gca.2016.08.015, 2016. 
Allison, N. and Finch, A. A.: High-resolution Sr∕Ca records in modern Porites lobata corals: Effects of skeletal extension rate and architecture, Geochem. Geophy. Geosy., 5, Q05001, https://doi.org/10.1029/2004GC000696, 2004. 
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In this study we tried to correlate Na / Ca ratios from cold-water corals with environmental parameters such as salinity, temperature and pH. We do not observe a correlation between Na / Ca ratios and seawater salinity, but we do observe a strong correlation with temperature. Na / Ca data from warm-water corals (Porites spp.) and bivalves (Mytilus edulis) support this correlation, indicating that similar controls on the incorporation of sodium exist in these aragonitic organisms.
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