TY - JOUR
T1 - Independent impacts of calcium and carbonate ion concentration on Mg and Sr incorporation in cultured benthic foraminifera
AU - Duenas-Bohorquez, A.
AU - Raitzsch, M.
AU - de Nooijer, L.J.
AU - Reichart, G.-J.
PY - 2011
Y1 - 2011
N2 - concentration
([CO3
2−]), and thereby calcite saturation state (Ω), 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 [CO3
2−] and thereby higher Ω is absent in either species. Comparison to results
from a similar culturing experiment, in which Ω 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 ~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.
AB - concentration
([CO3
2−]), and thereby calcite saturation state (Ω), 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 [CO3
2−] and thereby higher Ω is absent in either species. Comparison to results
from a similar culturing experiment, in which Ω 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 ~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.
U2 - 10.1016/j.marmicro.2011.08.002
DO - 10.1016/j.marmicro.2011.08.002
M3 - Article
SN - 0377-8398
VL - 81
SP - 122
EP - 130
JO - Marine Micropaleontology
JF - Marine Micropaleontology
IS - 3-4
ER -