Articles | Volume 11, issue 24
Research article
17 Dec 2014
Research article |  | 17 Dec 2014

Identifying vital effects in Halimeda algae with Ca isotopes

C. L. Blättler, S. M. Stanley, G. M. Henderson, and H. C. Jenkyns

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Cited articles

Blättler, C. L., Jenkyns, H. C., Reynard, L. M., and Henderson, G. M.: Significant increases in global weathering during Oceanic Anoxic Events 1a and 2 indicated by calcium isotopes, Earth Planet. Sci. Lett., 309, 77–88,, 2011.
Blättler, C. L., Henderson, G. M., and Jenkyns, H. C.: Explaining the Phanerozoic Ca-isotope history of seawater, Geology, 40, 843–846,, 2012.
Böhm, F., Gussone, N., Eisenhauer, A., Dullo, W.-C., Reynaud, S., and Paytan, A.: Calcium isotope fractionation in modern scleractinian corals, Geochim. Cosmochim. Ac., 70, 4452–4462,, 2006.
Borowitzka, M. A. and Larkum, A. W. D.: Calcification in algae: mechanisms and the role of metabolism, Cr. Rev. Plant Sci., 6, 1–45,, 1987.
Bots, P., Benning, L. G., Rickaby, R. E. M., and Shaw, S.: The role of SO4 in the switch from calcite to aragonite seas, Geology, 39, 331–334, 2011.
Short summary
Halimeda algae were used as a test organism to untangle some of the specific factors that influence skeletal composition, in particular Ca-isotope composition. Algae were stimulated to precipitate both calcite and aragonite by growth in artificial Cretaceous seawater. Comparison of the skeletal Ca-isotope ratios with inorganic carbonate forms indicates the effects of mineralogy and Rayleigh distillation of Ca on the geochemistry of their carbonate skeletons.
Final-revised paper