Acidification diminishes diatom silica production in the Southern Ocean
© 2019, The Author(s), under exclusive licence to Springer Nature Limited. Diatoms, large bloom-forming marine microorganisms, build frustules out of silicate, which ballasts the cells and aids their export to the deep ocean. This unique physiology forges an important link between the marine silicon...
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ftunivtsydney:oai:opus.lib.uts.edu.au:10453/136266 2023-05-15T13:52:42+02:00 Acidification diminishes diatom silica production in the Southern Ocean Petrou, K Baker, KG Nielsen, DA Hancock, AM Schulz, KG Davidson, AT 2019-10-01 application/pdf http://hdl.handle.net/10453/136266 unknown Nature Climate Change 10.1038/s41558-019-0557-y Nature Climate Change, 2019, 9 (10), pp. 781 - 786 1758-678X http://hdl.handle.net/10453/136266 Journal Article 2019 ftunivtsydney 2022-03-13T13:36:31Z © 2019, The Author(s), under exclusive licence to Springer Nature Limited. Diatoms, large bloom-forming marine microorganisms, build frustules out of silicate, which ballasts the cells and aids their export to the deep ocean. This unique physiology forges an important link between the marine silicon and carbon cycles. However, the effect of ocean acidification on the silicification of diatoms is unclear. Here we show that diatom silicification strongly diminishes with increased acidity in a natural Antarctic community. Analyses of single cells from within the community reveal that the effect of reduced pH on silicification differs among taxa, with several species having significantly reduced silica incorporation at CO2 levels equivalent to those projected for 2100. These findings suggest that, before the end of this century, ocean acidification may influence the carbon and silicon cycle by both altering the composition of the diatom assemblages and reducing cell ballasting, which will probably alter vertical flux of these elements to the deep ocean. Article in Journal/Newspaper Antarc* Antarctic Ocean acidification Southern Ocean University of Technology Sydney: OPUS - Open Publications of UTS Scholars Antarctic Southern Ocean |
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University of Technology Sydney: OPUS - Open Publications of UTS Scholars |
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© 2019, The Author(s), under exclusive licence to Springer Nature Limited. Diatoms, large bloom-forming marine microorganisms, build frustules out of silicate, which ballasts the cells and aids their export to the deep ocean. This unique physiology forges an important link between the marine silicon and carbon cycles. However, the effect of ocean acidification on the silicification of diatoms is unclear. Here we show that diatom silicification strongly diminishes with increased acidity in a natural Antarctic community. Analyses of single cells from within the community reveal that the effect of reduced pH on silicification differs among taxa, with several species having significantly reduced silica incorporation at CO2 levels equivalent to those projected for 2100. These findings suggest that, before the end of this century, ocean acidification may influence the carbon and silicon cycle by both altering the composition of the diatom assemblages and reducing cell ballasting, which will probably alter vertical flux of these elements to the deep ocean. |
format |
Article in Journal/Newspaper |
author |
Petrou, K Baker, KG Nielsen, DA Hancock, AM Schulz, KG Davidson, AT |
spellingShingle |
Petrou, K Baker, KG Nielsen, DA Hancock, AM Schulz, KG Davidson, AT Acidification diminishes diatom silica production in the Southern Ocean |
author_facet |
Petrou, K Baker, KG Nielsen, DA Hancock, AM Schulz, KG Davidson, AT |
author_sort |
Petrou, K |
title |
Acidification diminishes diatom silica production in the Southern Ocean |
title_short |
Acidification diminishes diatom silica production in the Southern Ocean |
title_full |
Acidification diminishes diatom silica production in the Southern Ocean |
title_fullStr |
Acidification diminishes diatom silica production in the Southern Ocean |
title_full_unstemmed |
Acidification diminishes diatom silica production in the Southern Ocean |
title_sort |
acidification diminishes diatom silica production in the southern ocean |
publishDate |
2019 |
url |
http://hdl.handle.net/10453/136266 |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic Ocean acidification Southern Ocean |
genre_facet |
Antarc* Antarctic Ocean acidification Southern Ocean |
op_relation |
Nature Climate Change 10.1038/s41558-019-0557-y Nature Climate Change, 2019, 9 (10), pp. 781 - 786 1758-678X http://hdl.handle.net/10453/136266 |
_version_ |
1766257160255176704 |