Independence of nutrient limitation and carbon dioxide impacts on the Southern Ocean coccolithophore Emiliania huxleyi
Abstract Future oceanic conditions induced by anthropogenic greenhouse gas emissions include warming, acidification and reduced nutrient supply due to increased stratification. Some parts of the Southern Ocean are expected to show rapid changes, especially for carbonate mineral saturation. Here we c...
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croxfordunivpr:10.1038/ismej.2017.53 2024-06-23T07:55:53+00:00 Independence of nutrient limitation and carbon dioxide impacts on the Southern Ocean coccolithophore Emiliania huxleyi Müller, Marius N Trull, Thomas W Hallegraeff, Gustaaf M 2017 http://dx.doi.org/10.1038/ismej.2017.53 http://www.nature.com/articles/ismej201753.pdf http://www.nature.com/articles/ismej201753 https://academic.oup.com/ismej/article-pdf/11/8/1777/56141604/41396_2017_article_bfismej201753.pdf en eng Oxford University Press (OUP) https://creativecommons.org/licenses/by-nc-sa/4.0/ https://creativecommons.org/licenses/by-nc-sa/4.0 The ISME Journal volume 11, issue 8, page 1777-1787 ISSN 1751-7362 1751-7370 journal-article 2017 croxfordunivpr https://doi.org/10.1038/ismej.2017.53 2024-06-04T06:10:47Z Abstract Future oceanic conditions induced by anthropogenic greenhouse gas emissions include warming, acidification and reduced nutrient supply due to increased stratification. Some parts of the Southern Ocean are expected to show rapid changes, especially for carbonate mineral saturation. Here we compare the physiological response of the model coccolithophore Emiliania huxleyi (strain EHSO 5.14, originating from 50oS, 149oE) with pH/CO2 gradients (mimicking ocean acidification ranging from 1 to 4 × current pCO2 levels) under nutrient-limited (nitrogen and phosphorus) and -replete conditions. Both nutrient limitations decreased per cell photosynthesis (particulate organic carbon (POC) production) and calcification (particulate inorganic carbon (PIC) production) rates for all pCO2 levels, with more than 50% reductions under nitrogen limitation. These impacts, however, became indistinguishable from nutrient-replete conditions when normalized to cell volume. Calcification decreased three-fold and linearly with increasing pCO2 under all nutrient conditions, and was accompanied by a smaller ~30% nonlinear reduction in POC production, manifested mainly above 3 × current pCO2. Our results suggest that normalization to cell volume allows the major impacts of nutrient limitation (changed cell sizes and reduced PIC and POC production rates) to be treated independently of the major impacts of increasing pCO2 and, additionally, stresses the importance of including cell volume measurements to the toolbox of standard physiological analysis of coccolithophores in field and laboratory studies. Article in Journal/Newspaper Ocean acidification Southern Ocean Oxford University Press Southern Ocean The ISME Journal 11 8 1777 1787 |
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Open Polar |
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Oxford University Press |
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croxfordunivpr |
language |
English |
description |
Abstract Future oceanic conditions induced by anthropogenic greenhouse gas emissions include warming, acidification and reduced nutrient supply due to increased stratification. Some parts of the Southern Ocean are expected to show rapid changes, especially for carbonate mineral saturation. Here we compare the physiological response of the model coccolithophore Emiliania huxleyi (strain EHSO 5.14, originating from 50oS, 149oE) with pH/CO2 gradients (mimicking ocean acidification ranging from 1 to 4 × current pCO2 levels) under nutrient-limited (nitrogen and phosphorus) and -replete conditions. Both nutrient limitations decreased per cell photosynthesis (particulate organic carbon (POC) production) and calcification (particulate inorganic carbon (PIC) production) rates for all pCO2 levels, with more than 50% reductions under nitrogen limitation. These impacts, however, became indistinguishable from nutrient-replete conditions when normalized to cell volume. Calcification decreased three-fold and linearly with increasing pCO2 under all nutrient conditions, and was accompanied by a smaller ~30% nonlinear reduction in POC production, manifested mainly above 3 × current pCO2. Our results suggest that normalization to cell volume allows the major impacts of nutrient limitation (changed cell sizes and reduced PIC and POC production rates) to be treated independently of the major impacts of increasing pCO2 and, additionally, stresses the importance of including cell volume measurements to the toolbox of standard physiological analysis of coccolithophores in field and laboratory studies. |
format |
Article in Journal/Newspaper |
author |
Müller, Marius N Trull, Thomas W Hallegraeff, Gustaaf M |
spellingShingle |
Müller, Marius N Trull, Thomas W Hallegraeff, Gustaaf M Independence of nutrient limitation and carbon dioxide impacts on the Southern Ocean coccolithophore Emiliania huxleyi |
author_facet |
Müller, Marius N Trull, Thomas W Hallegraeff, Gustaaf M |
author_sort |
Müller, Marius N |
title |
Independence of nutrient limitation and carbon dioxide impacts on the Southern Ocean coccolithophore Emiliania huxleyi |
title_short |
Independence of nutrient limitation and carbon dioxide impacts on the Southern Ocean coccolithophore Emiliania huxleyi |
title_full |
Independence of nutrient limitation and carbon dioxide impacts on the Southern Ocean coccolithophore Emiliania huxleyi |
title_fullStr |
Independence of nutrient limitation and carbon dioxide impacts on the Southern Ocean coccolithophore Emiliania huxleyi |
title_full_unstemmed |
Independence of nutrient limitation and carbon dioxide impacts on the Southern Ocean coccolithophore Emiliania huxleyi |
title_sort |
independence of nutrient limitation and carbon dioxide impacts on the southern ocean coccolithophore emiliania huxleyi |
publisher |
Oxford University Press (OUP) |
publishDate |
2017 |
url |
http://dx.doi.org/10.1038/ismej.2017.53 http://www.nature.com/articles/ismej201753.pdf http://www.nature.com/articles/ismej201753 https://academic.oup.com/ismej/article-pdf/11/8/1777/56141604/41396_2017_article_bfismej201753.pdf |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Ocean acidification Southern Ocean |
genre_facet |
Ocean acidification Southern Ocean |
op_source |
The ISME Journal volume 11, issue 8, page 1777-1787 ISSN 1751-7362 1751-7370 |
op_rights |
https://creativecommons.org/licenses/by-nc-sa/4.0/ https://creativecommons.org/licenses/by-nc-sa/4.0 |
op_doi |
https://doi.org/10.1038/ismej.2017.53 |
container_title |
The ISME Journal |
container_volume |
11 |
container_issue |
8 |
container_start_page |
1777 |
op_container_end_page |
1787 |
_version_ |
1802648660959297536 |