Near-future ocean acidification does not alter the lipid content and fatty acid composition of adult Antarctic krill
Euphausia superba (Antarctic krill) is a keystone species in the Southern Ocean, but little is known about how it will respond to climate change. Ocean acidification, caused by sequestration of carbon dioxide into ocean surface waters (pCO2), alters the lipid biochemistry of some organisms. This can...
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ftunivtasmania:oai:eprints.utas.edu.au:31224 2023-05-15T13:31:53+02:00 Near-future ocean acidification does not alter the lipid content and fatty acid composition of adult Antarctic krill Ericson, JA Hellessey, NG Kawaguchi, S Nichols, PD Nicol, S Hoem, N Virtue, P 2019 application/pdf https://eprints.utas.edu.au/31224/ https://eprints.utas.edu.au/31224/1/134669%20-%20Near-future%20ocean%20acidification%20does%20not%20alter%20the%20lipid%20content%20and%20fatty%20acid.pdf en eng Nature Publishing Group https://eprints.utas.edu.au/31224/1/134669%20-%20Near-future%20ocean%20acidification%20does%20not%20alter%20the%20lipid%20content%20and%20fatty%20acid.pdf Ericson, JA, Hellessey, NG orcid:0000-0002-3053-8720 , Kawaguchi, S, Nichols, PD, Nicol, S, Hoem, N and Virtue, P orcid:0000-0002-9870-1256 2019 , 'Near-future ocean acidification does not alter the lipid content and fatty acid composition of adult Antarctic krill' , Scientific Reports, vol. 9 , pp. 1-10 , doi:10.1038/s41598-019-48665-5 <http://dx.doi.org/10.1038/s41598-019-48665-5>. lipids. fatty acids Antarctic krill Article PeerReviewed 2019 ftunivtasmania https://doi.org/10.1038/s41598-019-48665-5 2021-09-20T22:17:51Z Euphausia superba (Antarctic krill) is a keystone species in the Southern Ocean, but little is known about how it will respond to climate change. Ocean acidification, caused by sequestration of carbon dioxide into ocean surface waters (pCO2), alters the lipid biochemistry of some organisms. This can have cascading effects up the food chain. In a year-long laboratory experiment adult krill were exposed to ambient seawater pCO2 levels (400 μatm), elevated pCO2 levels mimicking near-future ocean acidification (1000, 1500 and 2000 μatm) and an extreme pCO2 level (4000 μatm). Total lipid mass (mg g−1 DM) of krill was unaffected by near-future pCO2. Fatty acid composition (%) and fatty acid ratios associated with immune responses and cell membrane fluidity were also unaffected by near-future pCO2, apart from an increase in 18:3n-3/18:2n-6 ratios in krill in 1500 μatm pCO2 in winter and spring. Extreme pCO2 had no effect on krill lipid biochemistry during summer. During winter and spring, krill in extreme pCO2 had elevated levels of 18:2n-6 (up to 1.2% increase), 20:4n-6 (up to 0.8% increase), lower 18:3n-3/18:2n-6 and 20:5n-3/20:4n-6 ratios, and showed evidence of increased membrane fluidity (up to three-fold increase in phospholipid/sterol ratios). These results indicate that the lipid biochemistry of adult krill is robust to near-future ocean acidification. Article in Journal/Newspaper Antarc* Antarctic Antarctic Krill Euphausia superba Ocean acidification Southern Ocean University of Tasmania: UTas ePrints Antarctic Southern Ocean Scientific Reports 9 1 |
institution |
Open Polar |
collection |
University of Tasmania: UTas ePrints |
op_collection_id |
ftunivtasmania |
language |
English |
topic |
lipids. fatty acids Antarctic krill |
spellingShingle |
lipids. fatty acids Antarctic krill Ericson, JA Hellessey, NG Kawaguchi, S Nichols, PD Nicol, S Hoem, N Virtue, P Near-future ocean acidification does not alter the lipid content and fatty acid composition of adult Antarctic krill |
topic_facet |
lipids. fatty acids Antarctic krill |
description |
Euphausia superba (Antarctic krill) is a keystone species in the Southern Ocean, but little is known about how it will respond to climate change. Ocean acidification, caused by sequestration of carbon dioxide into ocean surface waters (pCO2), alters the lipid biochemistry of some organisms. This can have cascading effects up the food chain. In a year-long laboratory experiment adult krill were exposed to ambient seawater pCO2 levels (400 μatm), elevated pCO2 levels mimicking near-future ocean acidification (1000, 1500 and 2000 μatm) and an extreme pCO2 level (4000 μatm). Total lipid mass (mg g−1 DM) of krill was unaffected by near-future pCO2. Fatty acid composition (%) and fatty acid ratios associated with immune responses and cell membrane fluidity were also unaffected by near-future pCO2, apart from an increase in 18:3n-3/18:2n-6 ratios in krill in 1500 μatm pCO2 in winter and spring. Extreme pCO2 had no effect on krill lipid biochemistry during summer. During winter and spring, krill in extreme pCO2 had elevated levels of 18:2n-6 (up to 1.2% increase), 20:4n-6 (up to 0.8% increase), lower 18:3n-3/18:2n-6 and 20:5n-3/20:4n-6 ratios, and showed evidence of increased membrane fluidity (up to three-fold increase in phospholipid/sterol ratios). These results indicate that the lipid biochemistry of adult krill is robust to near-future ocean acidification. |
format |
Article in Journal/Newspaper |
author |
Ericson, JA Hellessey, NG Kawaguchi, S Nichols, PD Nicol, S Hoem, N Virtue, P |
author_facet |
Ericson, JA Hellessey, NG Kawaguchi, S Nichols, PD Nicol, S Hoem, N Virtue, P |
author_sort |
Ericson, JA |
title |
Near-future ocean acidification does not alter the lipid content and fatty acid composition of adult Antarctic krill |
title_short |
Near-future ocean acidification does not alter the lipid content and fatty acid composition of adult Antarctic krill |
title_full |
Near-future ocean acidification does not alter the lipid content and fatty acid composition of adult Antarctic krill |
title_fullStr |
Near-future ocean acidification does not alter the lipid content and fatty acid composition of adult Antarctic krill |
title_full_unstemmed |
Near-future ocean acidification does not alter the lipid content and fatty acid composition of adult Antarctic krill |
title_sort |
near-future ocean acidification does not alter the lipid content and fatty acid composition of adult antarctic krill |
publisher |
Nature Publishing Group |
publishDate |
2019 |
url |
https://eprints.utas.edu.au/31224/ https://eprints.utas.edu.au/31224/1/134669%20-%20Near-future%20ocean%20acidification%20does%20not%20alter%20the%20lipid%20content%20and%20fatty%20acid.pdf |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic Antarctic Krill Euphausia superba Ocean acidification Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Krill Euphausia superba Ocean acidification Southern Ocean |
op_relation |
https://eprints.utas.edu.au/31224/1/134669%20-%20Near-future%20ocean%20acidification%20does%20not%20alter%20the%20lipid%20content%20and%20fatty%20acid.pdf Ericson, JA, Hellessey, NG orcid:0000-0002-3053-8720 , Kawaguchi, S, Nichols, PD, Nicol, S, Hoem, N and Virtue, P orcid:0000-0002-9870-1256 2019 , 'Near-future ocean acidification does not alter the lipid content and fatty acid composition of adult Antarctic krill' , Scientific Reports, vol. 9 , pp. 1-10 , doi:10.1038/s41598-019-48665-5 <http://dx.doi.org/10.1038/s41598-019-48665-5>. |
op_doi |
https://doi.org/10.1038/s41598-019-48665-5 |
container_title |
Scientific Reports |
container_volume |
9 |
container_issue |
1 |
_version_ |
1766022056990736384 |