Allen, Katherine A.; Hoenisch, Baerbel; Eggins, Stephen; Rosenthal, Y
The ratio of boron to calcium (B/Ca) in the calcite tests of planktic foraminifers may serve as a proxy for past seawater chemistry, but controls on B incorporation are not yet certain. Here we present the results of laboratory culture experiments with live specimens of Globigerinoides ruber (pink) and Globigerinoides sacculifer, which provide new insight into B incorporation controls. We find that in G. sacculifer, B/Ca increases with increasing pH (lower [HCO 3-], higher [CO 32-] and [B(OH)...[Show more]
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