Skip to content

Research at St Andrews

Controls on Sr/Ca and Mg/Ca in scleractinian corals: the effects of Ca-ATPase and transcellular Ca channels on skeletal chemistry

Research output: Contribution to journalArticle

Abstract

The Sr/Ca of aragonitic coral skeletons is a commonly used palaeothermometer. However skeletal Sr/Ca is typically dominated by weekly-monthly oscillations which do not reflect temperature or seawater composition and the origins of which are currently unknown. To test the impact of transcellular Ca2+ transport processes on skeletal Sr/Ca, colonies of the branching coral, Pocillopora damicornis, were cultured in the presence of inhibitors of Ca-ATPase (ruthenium red) and Ca channels (verapamil hydrochloride). The photosynthesis, respiration and calcification rates of the colonies were monitored throughout the experiment. The skeleton deposited in the presence of the inhibitors was identified (by Ca-42 spike) and analysed for Sr/Ca and Mg/Ca by secondary ion mass spectrometry. The Sr/Ca of the aragonite deposited in the presence of either of the inhibitors was not significantly different from that of the solvent (dimethyl sulfoxide) control, although the coral calcification rate was reduced by up to 66% and 73% in the ruthenium red and verapamil treatments, respectively. The typical precision (95% confidence limits) of mean Sr/Ca determinations within any treatment was <+/- 1% and differences in skeletal Sr/Ca between treatments were correspondingly small. Either Ca-ATPase and Ca channels transport Sr2+ and Ca2+ in virtually the same ratio in which they are present in seawater or transcellular processes contribute little Ca2+ to the skeleton and most Ca is derived from seawater transported directly to the calcification site. Variations in the activities of Ca-ATPase and Ca-channels are not responsible for the weekly-monthly Sr/Ca oscillations observed in skeletal chronologies, assuming that the specificities of Ca transcellular transport processes are similar between coral genera. (C) 2011 Elsevier Ltd. All rights reserved.

Close

Details

Original languageEnglish
Pages (from-to)6350-6360
Number of pages11
JournalGeochimica et Cosmochimica Acta
Volume75
Issue number21
DOIs
Publication statusPublished - 1 Nov 2011

Discover related content
Find related publications, people, projects and more using interactive charts.

View graph of relations

Related by author

  1. The effect of ocean acidification on tropical coral calcification: insights from calcification fluid DIC chemistry

    Allison, N., Cole, C., Hintz, C., Hintz, K., Rae, J. & Finch, A., 10 Oct 2018, In : Chemical Geology. 497, p. 162-169 8 p.

    Research output: Contribution to journalArticle

  2. Corals concentrate dissolved inorganic carbon to facilitate calcification

    Allison, N., Cohen, I., Finch, A. A., Erez, J. & Tudhope, A. W., 22 Dec 2014, In : Nature Communications. 5, 5741.

    Research output: Contribution to journalArticle

Related by journal

  1. Coupled evolution of nitrogen cycling and redoxcline dynamics on the Yangtze Block across the Ediacaran-Cambrian transition

    Chen, Y., Diamond, C. W., Stüeken, E. E., Cai, C., Gill, B. C., Zhang, F., Bates, S. M., Chu, X., Ding, Y. & Lyons, T. W., 18 May 2019, In : Geochimica et Cosmochimica Acta. In press

    Research output: Contribution to journalArticle

  2. Effects of pH on redox proxies in a Jurassic rift lake: implications for interpreting environmental records in deep time

    Stüeken, E. E., Martinez, A., Love, G., Olsen, P. E., Bates, S. & Lyons, T. W., 1 May 2019, In : Geochimica et Cosmochimica Acta. 252, p. 240-267

    Research output: Contribution to journalArticle

  3. Isotopic fractionation of zirconium during magmatic differentiation and the stable isotope composition of the silicate Earth

    Inglis, E., Moynier, F., Creech, J., Deng, Z., Day, J., Teng, F-Z., Bizzarro, M., Jackson, M. & Savage, P., 1 Apr 2019, In : Geochimica et Cosmochimica Acta. 250, p. 311-323 13 p.

    Research output: Contribution to journalArticle

  4. Paleoproterozoic increase in zircon δ18O driven by rapid emergence of continental crust

    Spencer, C. J., Partin, C. A., Kirkland, C. L., Raub, T. D., Liebmann, J. & Stern, R. A., 24 Apr 2019, In : Geochimica et Cosmochimica Acta. 257, p. 16-25 10 p.

    Research output: Contribution to journalArticle

  5. Records of carbon and sulfur cycling during the Silurian Ireviken Event in Gotland, Sweden

    Rose, C., Fischer, W. W., Finnegan, S. & Fike, D. A., 1 Feb 2019, In : Geochimica et Cosmochimica Acta. 246, p. 299-316 18 p.

    Research output: Contribution to journalArticle

ID: 14868518