Journal
MARINE MICROPALEONTOLOGY
Volume 81, Issue 3-4, Pages 122-130Publisher
ELSEVIER
DOI: 10.1016/j.marmicro.2011.08.002
Keywords
Benthic foraminifera; Calcite saturation state; Paleoceanography; Biomineralization
Categories
Funding
- Dutch Organization for Scientific Research (NWO) [855.01.079 (PaleoSalt)]
- European Science Foundation (ESF) of the European Commission [ERAS-CF-2003-980409]
Ask authors/readers for more resources
Laboratory culture experiments were conducted to determine effects of seawater carbonate ion concentration ([CO32-]), and thereby calcite saturation state (Omega), on Mg and Sr incorporation into calcite of two species of shallow-water benthic foraminifera: Ammonia tepida and Heterostegina depressa. Impact on Mg and Sr incorporation by increased seawater [CO32-] and thereby higher Omega is absent in either species. Comparison to results from a similar culturing experiment, in which Omega was varied as a function of [Ca2+], reveals that saturation state affects incorporation of Mg and Sr through calcium-rather than carbonate availability. The similarity in response by both species is surprising since the average Mg/Ca ratio is similar to 70 times higher in H. depressa than in A. tepida. Furthermore, these results suggest that the ions involved in biomineralization (i.e. Ca2+ and DIC) are processed by separate cellular transport mechanisms. The similar response of Mg and Sr incorporation in this study suggests that only differences in the Ca2+ transport mechanism affect divalent cation partitioning. (C) 2011 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available