Extensive dissolution of live pteropods in the Southern Ocean
The carbonate chemistry of the surface ocean is rapidly changing with ocean acidification, a result of human activities. In the upper layers of the Southern Ocean, aragonite—a metastable form of calcium carbonate with rapid dissolution kinetics—may become undersaturated by 2050 (ref. 2). Aragonite u...
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ftnerc:oai:nora.nerc.ac.uk:20728 2023-05-15T13:45:12+02:00 Extensive dissolution of live pteropods in the Southern Ocean Bednarsek, N. Tarling, G. A. Bakker, D. C. E. Fielding, S. Jones, E. M. Venables, H. J. Ward, P. Kuzirian, A. Lézé, B. Feely, R. A. Murphy, E.J. 2012 text http://nora.nerc.ac.uk/id/eprint/20728/ https://nora.nerc.ac.uk/id/eprint/20728/1/Bednarsek%20et%20al%20NGEO.pdf https://doi.org/10.1038/NGEO1635 en eng Nature Publishing Group https://nora.nerc.ac.uk/id/eprint/20728/1/Bednarsek%20et%20al%20NGEO.pdf Bednarsek, N.; Tarling, G. A. orcid:0000-0002-3753-5899 Bakker, D. C. E.; Fielding, S. orcid:0000-0002-3152-4742 Jones, E. M.; Venables, H. J.; Ward, P.; Kuzirian, A.; Lézé, B.; Feely, R. A.; Murphy, E.J. orcid:0000-0002-7369-9196 . 2012 Extensive dissolution of live pteropods in the Southern Ocean. Nature Geoscience, 5 (12). 881-885. https://doi.org/10.1038/NGEO1635 <https://doi.org/10.1038/NGEO1635> Marine Sciences Publication - Article PeerReviewed 2012 ftnerc https://doi.org/10.1038/NGEO1635 2023-02-04T19:33:04Z The carbonate chemistry of the surface ocean is rapidly changing with ocean acidification, a result of human activities. In the upper layers of the Southern Ocean, aragonite—a metastable form of calcium carbonate with rapid dissolution kinetics—may become undersaturated by 2050 (ref. 2). Aragonite undersaturation is likely to affect aragonite-shelled organisms, which can dominate surface water communities in polar regions. Here we present analyses of specimens of the pteropod Limacina helicina antarctica that were extracted live from the Southern Ocean early in 2008. We sampled from the top 200m of the water column, where aragonite saturation levels were around 1, as upwelled deep water is mixed with surface water containing anthropogenic CO2. Comparing the shell structure with samples from aragonite-supersaturated regions elsewhere under a scanning electron microscope, we found severe levels of shell dissolution in the undersaturated region alone. According to laboratory incubations of intact samples with a range of aragonite saturation levels, eight days of incubation in aragonite saturation levels of 0.94– 1.12 produces equivalent levels of dissolution. As deep-water upwelling and CO2 absorption by surface waters is likely to increase as a result of human activities2,4, we conclude that upper ocean regions where aragonite-shelled organisms are affected by dissolution are likely to expand. Article in Journal/Newspaper Antarc* Antarctica Limacina helicina Ocean acidification Southern Ocean Natural Environment Research Council: NERC Open Research Archive Southern Ocean Nature Geoscience 5 12 881 885 |
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Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
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ftnerc |
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English |
topic |
Marine Sciences |
spellingShingle |
Marine Sciences Bednarsek, N. Tarling, G. A. Bakker, D. C. E. Fielding, S. Jones, E. M. Venables, H. J. Ward, P. Kuzirian, A. Lézé, B. Feely, R. A. Murphy, E.J. Extensive dissolution of live pteropods in the Southern Ocean |
topic_facet |
Marine Sciences |
description |
The carbonate chemistry of the surface ocean is rapidly changing with ocean acidification, a result of human activities. In the upper layers of the Southern Ocean, aragonite—a metastable form of calcium carbonate with rapid dissolution kinetics—may become undersaturated by 2050 (ref. 2). Aragonite undersaturation is likely to affect aragonite-shelled organisms, which can dominate surface water communities in polar regions. Here we present analyses of specimens of the pteropod Limacina helicina antarctica that were extracted live from the Southern Ocean early in 2008. We sampled from the top 200m of the water column, where aragonite saturation levels were around 1, as upwelled deep water is mixed with surface water containing anthropogenic CO2. Comparing the shell structure with samples from aragonite-supersaturated regions elsewhere under a scanning electron microscope, we found severe levels of shell dissolution in the undersaturated region alone. According to laboratory incubations of intact samples with a range of aragonite saturation levels, eight days of incubation in aragonite saturation levels of 0.94– 1.12 produces equivalent levels of dissolution. As deep-water upwelling and CO2 absorption by surface waters is likely to increase as a result of human activities2,4, we conclude that upper ocean regions where aragonite-shelled organisms are affected by dissolution are likely to expand. |
format |
Article in Journal/Newspaper |
author |
Bednarsek, N. Tarling, G. A. Bakker, D. C. E. Fielding, S. Jones, E. M. Venables, H. J. Ward, P. Kuzirian, A. Lézé, B. Feely, R. A. Murphy, E.J. |
author_facet |
Bednarsek, N. Tarling, G. A. Bakker, D. C. E. Fielding, S. Jones, E. M. Venables, H. J. Ward, P. Kuzirian, A. Lézé, B. Feely, R. A. Murphy, E.J. |
author_sort |
Bednarsek, N. |
title |
Extensive dissolution of live pteropods in the Southern Ocean |
title_short |
Extensive dissolution of live pteropods in the Southern Ocean |
title_full |
Extensive dissolution of live pteropods in the Southern Ocean |
title_fullStr |
Extensive dissolution of live pteropods in the Southern Ocean |
title_full_unstemmed |
Extensive dissolution of live pteropods in the Southern Ocean |
title_sort |
extensive dissolution of live pteropods in the southern ocean |
publisher |
Nature Publishing Group |
publishDate |
2012 |
url |
http://nora.nerc.ac.uk/id/eprint/20728/ https://nora.nerc.ac.uk/id/eprint/20728/1/Bednarsek%20et%20al%20NGEO.pdf https://doi.org/10.1038/NGEO1635 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Antarc* Antarctica Limacina helicina Ocean acidification Southern Ocean |
genre_facet |
Antarc* Antarctica Limacina helicina Ocean acidification Southern Ocean |
op_relation |
https://nora.nerc.ac.uk/id/eprint/20728/1/Bednarsek%20et%20al%20NGEO.pdf Bednarsek, N.; Tarling, G. A. orcid:0000-0002-3753-5899 Bakker, D. C. E.; Fielding, S. orcid:0000-0002-3152-4742 Jones, E. M.; Venables, H. J.; Ward, P.; Kuzirian, A.; Lézé, B.; Feely, R. A.; Murphy, E.J. orcid:0000-0002-7369-9196 . 2012 Extensive dissolution of live pteropods in the Southern Ocean. Nature Geoscience, 5 (12). 881-885. https://doi.org/10.1038/NGEO1635 <https://doi.org/10.1038/NGEO1635> |
op_doi |
https://doi.org/10.1038/NGEO1635 |
container_title |
Nature Geoscience |
container_volume |
5 |
container_issue |
12 |
container_start_page |
881 |
op_container_end_page |
885 |
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1766217241892749312 |