Acidification diminishes diatom silica production in the Southern Ocean
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 silic...
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ftunivtasmania:oai:eprints.utas.edu.au:33149 2023-05-15T13:31:54+02:00 Acidification diminishes diatom silica production in the Southern Ocean Petrou, K Baker, KG Nielsen, DA Hancock, AM Schultz, KG Davidson, AT 2019 https://eprints.utas.edu.au/33149/ unknown Nature Publishing Group Petrou, K, Baker, KG, Nielsen, DA, Hancock, AM orcid:0000-0001-6049-5592 , Schultz, KG and Davidson, AT 2019 , 'Acidification diminishes diatom silica production in the Southern Ocean' , Nature Climate Change, vol. 9, no. 10 , pp. 781-786 , doi:10.1038/s41558-019-0557-y <http://dx.doi.org/10.1038/s41558-019-0557-y>. ocean acidification phytoplankton diatoms silica Antarctica Article PeerReviewed 2019 ftunivtasmania https://doi.org/10.1038/s41558-019-0557-y 2021-10-04T22:17:43Z 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 Antarctica Ocean acidification Southern Ocean University of Tasmania: UTas ePrints Antarctic Southern Ocean Nature Climate Change 9 10 781 786 |
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University of Tasmania: UTas ePrints |
op_collection_id |
ftunivtasmania |
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unknown |
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ocean acidification phytoplankton diatoms silica Antarctica |
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ocean acidification phytoplankton diatoms silica Antarctica Petrou, K Baker, KG Nielsen, DA Hancock, AM Schultz, KG Davidson, AT Acidification diminishes diatom silica production in the Southern Ocean |
topic_facet |
ocean acidification phytoplankton diatoms silica Antarctica |
description |
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 Schultz, KG Davidson, AT |
author_facet |
Petrou, K Baker, KG Nielsen, DA Hancock, AM Schultz, 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 |
publisher |
Nature Publishing Group |
publishDate |
2019 |
url |
https://eprints.utas.edu.au/33149/ |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic Antarctica Ocean acidification Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Ocean acidification Southern Ocean |
op_relation |
Petrou, K, Baker, KG, Nielsen, DA, Hancock, AM orcid:0000-0001-6049-5592 , Schultz, KG and Davidson, AT 2019 , 'Acidification diminishes diatom silica production in the Southern Ocean' , Nature Climate Change, vol. 9, no. 10 , pp. 781-786 , doi:10.1038/s41558-019-0557-y <http://dx.doi.org/10.1038/s41558-019-0557-y>. |
op_doi |
https://doi.org/10.1038/s41558-019-0557-y |
container_title |
Nature Climate Change |
container_volume |
9 |
container_issue |
10 |
container_start_page |
781 |
op_container_end_page |
786 |
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1766022218813276160 |