Geochemistry of benthic foraminifera grown under different carbonate system conditions
Insights into past marine carbon cycling and water mass properties can be obtained through controlled laboratory experiments with accurate seawater carbonate system (C-system) manipulations. Here, we explored the use of strontium/calcium ratio (Sr/Ca) of the calcite shells of benthic foraminifera as...
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ftseanoe:oai:seanoe.org:89623 2023-05-15T17:51:54+02:00 Geochemistry of benthic foraminifera grown under different carbonate system conditions Mojtahid, Meryem Depuydt, Pauline Mouret, Aurélia Le Houedec, Sandrine Fiorini, Sarah Chollet, Simon Massol, Florent Dohou, Francis Filipsson, Helena L. Boer, Wim Reichart, Gert-jan Barras, Christine 2022 https://doi.org/10.17882/89623 https://www.seanoe.org/data/00784/89623/ unknown SEANOE doi:10.17882/89623 https://doi.org/10.17882/89623 https://www.seanoe.org/data/00784/89623/ CC-BY-ND CC-BY-ND Carbonate system Culture experiment pCO2 pH DIC Total Alkalinity Bicarbonate ions Carbonate ions Sr/Ca Benthic foraminifera Ocean acidification Biomineralisation dataset 2022 ftseanoe https://doi.org/10.17882/89623 2022-11-30T17:21:39Z Insights into past marine carbon cycling and water mass properties can be obtained through controlled laboratory experiments with accurate seawater carbonate system (C-system) manipulations. Here, we explored the use of strontium/calcium ratio (Sr/Ca) of the calcite shells of benthic foraminifera as a potential seawater C-system proxy through a controlled growth experiment with two deep-sea species (Bulimina marginata and Cassidulina laevigata) and one intertidal species (Ammonia T6). To this aim, we decoupled carbonate chemistry in controlled growth experiments, i.e., changing pH at constant dissolved inorganic carbon (DIC) and changing DIC at constant pH. Four climatic chambers were used with different controlled concentrations of atmospheric pCO2 (180 ppm, 410 ppm, 1000 ppm, 1500 ppm). Our results demonstrated that low pH conditions (7.56-7.73) did not influence the survival and growth rates of the three species. However, low DIC conditions (879 µmol kg-1) negatively affected B. marginata and C. laevigata through low growth rate, whereas no effect was observed for Ammonia T6. Our results also showed a significant positive correlation between Sr/Ca and the C-system (DIC - bicarbonate ion concentration) for Ammonia T6 and B. marginata. For these two species, the regression models were coherent with published data (existing so far only for Ammonia T6) and showed overall similar slopes but different intercepts, implying species-specific effect. Furthermore, the Sr/Ca - C-system relationship was not impacted by ontogenetic trends between chamber stages, which is a considerable advantage for paleo-applications. However, no correlation with any of the C-system parameters was observed for Sr/Ca in C. laevigata. This might imply either a strong species-specific effect and/or a low tolerance to laboratory conditions leading to physiological stress, thereby impacting the Sr incorporation into the calcite lattice. Dataset Ocean acidification SEANOE (Sea scientific open data publication) |
institution |
Open Polar |
collection |
SEANOE (Sea scientific open data publication) |
op_collection_id |
ftseanoe |
language |
unknown |
topic |
Carbonate system Culture experiment pCO2 pH DIC Total Alkalinity Bicarbonate ions Carbonate ions Sr/Ca Benthic foraminifera Ocean acidification Biomineralisation |
spellingShingle |
Carbonate system Culture experiment pCO2 pH DIC Total Alkalinity Bicarbonate ions Carbonate ions Sr/Ca Benthic foraminifera Ocean acidification Biomineralisation Mojtahid, Meryem Depuydt, Pauline Mouret, Aurélia Le Houedec, Sandrine Fiorini, Sarah Chollet, Simon Massol, Florent Dohou, Francis Filipsson, Helena L. Boer, Wim Reichart, Gert-jan Barras, Christine Geochemistry of benthic foraminifera grown under different carbonate system conditions |
topic_facet |
Carbonate system Culture experiment pCO2 pH DIC Total Alkalinity Bicarbonate ions Carbonate ions Sr/Ca Benthic foraminifera Ocean acidification Biomineralisation |
description |
Insights into past marine carbon cycling and water mass properties can be obtained through controlled laboratory experiments with accurate seawater carbonate system (C-system) manipulations. Here, we explored the use of strontium/calcium ratio (Sr/Ca) of the calcite shells of benthic foraminifera as a potential seawater C-system proxy through a controlled growth experiment with two deep-sea species (Bulimina marginata and Cassidulina laevigata) and one intertidal species (Ammonia T6). To this aim, we decoupled carbonate chemistry in controlled growth experiments, i.e., changing pH at constant dissolved inorganic carbon (DIC) and changing DIC at constant pH. Four climatic chambers were used with different controlled concentrations of atmospheric pCO2 (180 ppm, 410 ppm, 1000 ppm, 1500 ppm). Our results demonstrated that low pH conditions (7.56-7.73) did not influence the survival and growth rates of the three species. However, low DIC conditions (879 µmol kg-1) negatively affected B. marginata and C. laevigata through low growth rate, whereas no effect was observed for Ammonia T6. Our results also showed a significant positive correlation between Sr/Ca and the C-system (DIC - bicarbonate ion concentration) for Ammonia T6 and B. marginata. For these two species, the regression models were coherent with published data (existing so far only for Ammonia T6) and showed overall similar slopes but different intercepts, implying species-specific effect. Furthermore, the Sr/Ca - C-system relationship was not impacted by ontogenetic trends between chamber stages, which is a considerable advantage for paleo-applications. However, no correlation with any of the C-system parameters was observed for Sr/Ca in C. laevigata. This might imply either a strong species-specific effect and/or a low tolerance to laboratory conditions leading to physiological stress, thereby impacting the Sr incorporation into the calcite lattice. |
format |
Dataset |
author |
Mojtahid, Meryem Depuydt, Pauline Mouret, Aurélia Le Houedec, Sandrine Fiorini, Sarah Chollet, Simon Massol, Florent Dohou, Francis Filipsson, Helena L. Boer, Wim Reichart, Gert-jan Barras, Christine |
author_facet |
Mojtahid, Meryem Depuydt, Pauline Mouret, Aurélia Le Houedec, Sandrine Fiorini, Sarah Chollet, Simon Massol, Florent Dohou, Francis Filipsson, Helena L. Boer, Wim Reichart, Gert-jan Barras, Christine |
author_sort |
Mojtahid, Meryem |
title |
Geochemistry of benthic foraminifera grown under different carbonate system conditions |
title_short |
Geochemistry of benthic foraminifera grown under different carbonate system conditions |
title_full |
Geochemistry of benthic foraminifera grown under different carbonate system conditions |
title_fullStr |
Geochemistry of benthic foraminifera grown under different carbonate system conditions |
title_full_unstemmed |
Geochemistry of benthic foraminifera grown under different carbonate system conditions |
title_sort |
geochemistry of benthic foraminifera grown under different carbonate system conditions |
publisher |
SEANOE |
publishDate |
2022 |
url |
https://doi.org/10.17882/89623 https://www.seanoe.org/data/00784/89623/ |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
doi:10.17882/89623 https://doi.org/10.17882/89623 https://www.seanoe.org/data/00784/89623/ |
op_rights |
CC-BY-ND |
op_rightsnorm |
CC-BY-ND |
op_doi |
https://doi.org/10.17882/89623 |
_version_ |
1766159191722950656 |