Impact of dissolved CO2 on calcification in two large, benthic foraminiferal species
Rising atmospheric CO2 shifts the marine inorganic carbonate system and decreases seawater pH, a process often abbreviated to ‘ocean acidification’. Since acidification decreases the saturation state for crystalline calcium carbonate (e.g., calcite and aragonite), rising dissolved CO2 levels will ei...
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ftdoajarticles:oai:doaj.org/article:4c0830d721e4442e970bbcb925e67777 2023-10-01T03:58:34+02:00 Impact of dissolved CO2 on calcification in two large, benthic foraminiferal species Linda Karoline Dämmer Angelina Ivkić Lennart de Nooijer Willem Renema Alice E. Webb Gert-Jan Reichart 2023-01-01T00:00:00Z https://doaj.org/article/4c0830d721e4442e970bbcb925e67777 EN eng Public Library of Science (PLoS) https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10431644/?tool=EBI https://doaj.org/toc/1932-6203 1932-6203 https://doaj.org/article/4c0830d721e4442e970bbcb925e67777 PLoS ONE, Vol 18, Iss 8 (2023) Medicine R Science Q article 2023 ftdoajarticles 2023-09-03T00:55:02Z Rising atmospheric CO2 shifts the marine inorganic carbonate system and decreases seawater pH, a process often abbreviated to ‘ocean acidification’. Since acidification decreases the saturation state for crystalline calcium carbonate (e.g., calcite and aragonite), rising dissolved CO2 levels will either increase the energy demand for calcification or reduce the total amount of CaCO3 precipitated. Here we report growth of two large benthic photosymbiont-bearing foraminifera, Heterostegina depressa and Amphistegina lessonii, cultured at four different ocean acidification scenarios (400, 700, 1000 and 2200 ppm atmospheric pCO2). Using the alkalinity anomaly technique, we calculated the amount of calcium carbonate precipitated during the incubation and found that both species produced the most carbonate at intermediate CO2 levels. The chamber addition rates for each of the conditions were also determined and matched the changes in alkalinity. These results were complemented by micro-CT scanning of selected specimens to visualize the effect of CO2 on growth. The increased chamber addition rates at elevated CO2 concentrations suggest that both foraminifera species can take advantage of the increased availability of the inorganic carbon, despite a lower saturation state. This adds to the growing number of reports showing the variable response of foraminifera to elevated CO2 concentrations, which is likely a consequence of differences in calcification mechanisms. Article in Journal/Newspaper Ocean acidification Directory of Open Access Journals: DOAJ Articles |
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Medicine R Science Q Linda Karoline Dämmer Angelina Ivkić Lennart de Nooijer Willem Renema Alice E. Webb Gert-Jan Reichart Impact of dissolved CO2 on calcification in two large, benthic foraminiferal species |
topic_facet |
Medicine R Science Q |
description |
Rising atmospheric CO2 shifts the marine inorganic carbonate system and decreases seawater pH, a process often abbreviated to ‘ocean acidification’. Since acidification decreases the saturation state for crystalline calcium carbonate (e.g., calcite and aragonite), rising dissolved CO2 levels will either increase the energy demand for calcification or reduce the total amount of CaCO3 precipitated. Here we report growth of two large benthic photosymbiont-bearing foraminifera, Heterostegina depressa and Amphistegina lessonii, cultured at four different ocean acidification scenarios (400, 700, 1000 and 2200 ppm atmospheric pCO2). Using the alkalinity anomaly technique, we calculated the amount of calcium carbonate precipitated during the incubation and found that both species produced the most carbonate at intermediate CO2 levels. The chamber addition rates for each of the conditions were also determined and matched the changes in alkalinity. These results were complemented by micro-CT scanning of selected specimens to visualize the effect of CO2 on growth. The increased chamber addition rates at elevated CO2 concentrations suggest that both foraminifera species can take advantage of the increased availability of the inorganic carbon, despite a lower saturation state. This adds to the growing number of reports showing the variable response of foraminifera to elevated CO2 concentrations, which is likely a consequence of differences in calcification mechanisms. |
format |
Article in Journal/Newspaper |
author |
Linda Karoline Dämmer Angelina Ivkić Lennart de Nooijer Willem Renema Alice E. Webb Gert-Jan Reichart |
author_facet |
Linda Karoline Dämmer Angelina Ivkić Lennart de Nooijer Willem Renema Alice E. Webb Gert-Jan Reichart |
author_sort |
Linda Karoline Dämmer |
title |
Impact of dissolved CO2 on calcification in two large, benthic foraminiferal species |
title_short |
Impact of dissolved CO2 on calcification in two large, benthic foraminiferal species |
title_full |
Impact of dissolved CO2 on calcification in two large, benthic foraminiferal species |
title_fullStr |
Impact of dissolved CO2 on calcification in two large, benthic foraminiferal species |
title_full_unstemmed |
Impact of dissolved CO2 on calcification in two large, benthic foraminiferal species |
title_sort |
impact of dissolved co2 on calcification in two large, benthic foraminiferal species |
publisher |
Public Library of Science (PLoS) |
publishDate |
2023 |
url |
https://doaj.org/article/4c0830d721e4442e970bbcb925e67777 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
PLoS ONE, Vol 18, Iss 8 (2023) |
op_relation |
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10431644/?tool=EBI https://doaj.org/toc/1932-6203 1932-6203 https://doaj.org/article/4c0830d721e4442e970bbcb925e67777 |
_version_ |
1778531411369656320 |