Publication Date:
2024-03-15
Description:
Laboratory culture experiments were conducted to determine effects of seawater carbonate ion concentration ([CO32-]), and thereby calcite saturation state, 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 calcite saturation state, is absent in either species. Comparison to results from a similar culturing experiment, in which calcite saturation state 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.
Keywords:
Alkalinity, total; Alkalinity, total, standard deviation; Ammonia tepida; Ammonia tepida, chambers added; Ammonia tepida, chambers added per individual; Ammonia tepida, magnesium/calcium ratio; Ammonia tepida, magnesium/calcium ratio, standard deviation; Ammonia tepida, strontium/calcium ratio; Ammonia tepida, strontium/calcium ratio, standard deviation; Aragonite saturation state; Benthos; Bicarbonate ion; Bottles or small containers/Aquaria (〈20 L); Calcification/Dissolution; Calcite saturation state; Calcite saturation state, standard deviation; Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbon, inorganic, dissolved, standard deviation; Carbonate ion; Carbonate ion, standard deviation; Carbonate system computation flag; Carbon dioxide; Chromista; Coast and continental shelf; EPOCA; EUR-OCEANS; European network of excellence for Ocean Ecosystems Analysis; European Project on Ocean Acidification; Foraminifera; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Heterostegina depressa; Heterostegina depressa, magnesium/calcium ratio; Heterostegina depressa, magnesium/calcium ratio, standard deviation; Heterostegina depressa, strontium/calcium ratio; Heterostegina depressa, strontium/calcium ratio, standard deviation; Heterotrophic prokaryotes; Identification; Laboratory experiment; Measured; Mortality/Survival; North Atlantic; Number of specimens; OA-ICC; Ocean Acidification International Coordination Centre; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); pH; pH, standard deviation; Replicates; Rows of chambers added; Rows of chambers added per individual; Salinity; Salinity, standard deviation; Single species; Species; Temperate; Temperature, standard deviation; Temperature, water
Type:
Dataset
Format:
text/tab-separated-values, 282 data points
Permalink
