Coccolithophores and calcite saturation state in the Baltic and Black Seas

57Citations
Citations of this article
136Readers
Mendeley users who have this article in their library.

Abstract

The Baltic and Black Seas are both brackish, that is to say both have salinities intermediate between freshwater and seawater. The coccolithophore Emiliania huxleyi is abundant in one, the Black Sea, but absent from the other, the Baltic Sea. Here we present summertime coccolithophore measurements confirming this difference, as well as data on the calcium carbonate saturation state of the Baltic Sea. We find that the Baltic Sea becomes undersaturated (or nearly so) in winter, with respect to both the aragonite and calcite mineral forms of CaCO 3. Data for the Black Sea are more limited, but it appears to remain strongly supersaturated yearround. The absence of E. huxleyi from the Baltic Sea could therefore potentially be explained by dissolution of their coccoliths in winter, suggesting that minimum annual (wintertime) saturation states could be most important in determining future ocean acidification impacts. In addition to this potential importance of winter saturation state, alternative explanations are also possible, either related to differences in salinity or else to differences in silicate concentrations. © Author(s) 2008.

Cite

CITATION STYLE

APA

Tyrrell, T., Schneider, B., Charalampopoulou, A., & Riebesell, U. (2008). Coccolithophores and calcite saturation state in the Baltic and Black Seas. Biogeosciences, 5(2), 485–494. https://doi.org/10.5194/bg-5-485-2008

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free