Hydrostatic Pressure and Temperature Effects on the Membranes of a Seasonally Migrating Marine Copepod
Marine planktonic copepods of the order Calanoida are central to the ecology and productivity of high latitude ecosystems, representing the interface between primary producers and fish. These animals typically undertake a seasonal vertical migration into the deep sea, where they remain dormant for p...
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ftunivstirling:oai:dspace.stir.ac.uk:1893/28748 2023-05-15T18:25:46+02:00 Hydrostatic Pressure and Temperature Effects on the Membranes of a Seasonally Migrating Marine Copepod Pond, David W Tarling, Geraint A Mayor, Daniel J Natural Environment Research Council British Antarctic Survey Scottish Association for Marine Science University of Aberdeen 2014-10-22 application/pdf http://hdl.handle.net/1893/28748 https://doi.org/10.1371/journal.pone.0111043 http://dspace.stir.ac.uk/bitstream/1893/28748/1/Pond%20et%20al-PLOS-2015.PDF en eng Public Library of Science (PLoS) Pond DW, Tarling GA & Mayor DJ (2014) Hydrostatic Pressure and Temperature Effects on the Membranes of a Seasonally Migrating Marine Copepod. PLoS ONE, 9 (10), Art. No.: e111043. https://doi.org/10.1371/journal.pone.0111043 e111043 http://hdl.handle.net/1893/28748 doi:10.1371/journal.pone.0111043 25338196 WOS:000343674800097 2-s2.0-84908375464 1090671 http://dspace.stir.ac.uk/bitstream/1893/28748/1/Pond%20et%20al-PLOS-2015.PDF © 2014 Pond et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. http://creativecommons.org/licenses/by/4.0/ CC-BY General Biochemistry Genetics and Molecular Biology General Agricultural and Biological Sciences General Medicine Journal Article VoR - Version of Record 2014 ftunivstirling https://doi.org/10.1371/journal.pone.0111043 2022-06-13T18:45:32Z Marine planktonic copepods of the order Calanoida are central to the ecology and productivity of high latitude ecosystems, representing the interface between primary producers and fish. These animals typically undertake a seasonal vertical migration into the deep sea, where they remain dormant for periods of between three and nine months. Descending copepods are subject to low temperatures and increased hydrostatic pressures. Nothing is known about how these organisms adapt their membranes to these environmental stressors. We collected copepods (Calanoides acutus) from the Southern Ocean at depth horizons ranging from surface waters down to 1000 m. Temperature and/or pressure both had significant, additive effects on the overall composition of the membrane phospholipid fatty acids (PLFAs) in C. acutus. The most prominent constituent of the PLFAs, the polyunsaturated fatty acid docosahexanoic acid [DHA – 22:6(n-3)], was affected by a significant interaction between temperature and pressure. This moiety increased with pressure, with the rate of increase being greater at colder temperatures. We suggest that DHA is key to the physiological adaptations of vertically migrating zooplankton, most likely because the biophysical properties of this compound are suited to maintaining membrane order in the cold, high pressure conditions that persist in the deep sea. As copepods cannot synthesise DHA and do not feed during dormancy, sufficient DHA must be accumulated through ingestion before migration is initiated. Climate-driven changes in the timing and abundance of the flagellated microplankton that supply DHA to copepods have major implications for the capacity of these animals to undertake their seasonal life cycle successfully. Article in Journal/Newspaper Southern Ocean Copepods University of Stirling: Stirling Digital Research Repository Southern Ocean PLoS ONE 9 10 e111043 |
institution |
Open Polar |
collection |
University of Stirling: Stirling Digital Research Repository |
op_collection_id |
ftunivstirling |
language |
English |
topic |
General Biochemistry Genetics and Molecular Biology General Agricultural and Biological Sciences General Medicine |
spellingShingle |
General Biochemistry Genetics and Molecular Biology General Agricultural and Biological Sciences General Medicine Pond, David W Tarling, Geraint A Mayor, Daniel J Hydrostatic Pressure and Temperature Effects on the Membranes of a Seasonally Migrating Marine Copepod |
topic_facet |
General Biochemistry Genetics and Molecular Biology General Agricultural and Biological Sciences General Medicine |
description |
Marine planktonic copepods of the order Calanoida are central to the ecology and productivity of high latitude ecosystems, representing the interface between primary producers and fish. These animals typically undertake a seasonal vertical migration into the deep sea, where they remain dormant for periods of between three and nine months. Descending copepods are subject to low temperatures and increased hydrostatic pressures. Nothing is known about how these organisms adapt their membranes to these environmental stressors. We collected copepods (Calanoides acutus) from the Southern Ocean at depth horizons ranging from surface waters down to 1000 m. Temperature and/or pressure both had significant, additive effects on the overall composition of the membrane phospholipid fatty acids (PLFAs) in C. acutus. The most prominent constituent of the PLFAs, the polyunsaturated fatty acid docosahexanoic acid [DHA – 22:6(n-3)], was affected by a significant interaction between temperature and pressure. This moiety increased with pressure, with the rate of increase being greater at colder temperatures. We suggest that DHA is key to the physiological adaptations of vertically migrating zooplankton, most likely because the biophysical properties of this compound are suited to maintaining membrane order in the cold, high pressure conditions that persist in the deep sea. As copepods cannot synthesise DHA and do not feed during dormancy, sufficient DHA must be accumulated through ingestion before migration is initiated. Climate-driven changes in the timing and abundance of the flagellated microplankton that supply DHA to copepods have major implications for the capacity of these animals to undertake their seasonal life cycle successfully. |
author2 |
Natural Environment Research Council British Antarctic Survey Scottish Association for Marine Science University of Aberdeen |
format |
Article in Journal/Newspaper |
author |
Pond, David W Tarling, Geraint A Mayor, Daniel J |
author_facet |
Pond, David W Tarling, Geraint A Mayor, Daniel J |
author_sort |
Pond, David W |
title |
Hydrostatic Pressure and Temperature Effects on the Membranes of a Seasonally Migrating Marine Copepod |
title_short |
Hydrostatic Pressure and Temperature Effects on the Membranes of a Seasonally Migrating Marine Copepod |
title_full |
Hydrostatic Pressure and Temperature Effects on the Membranes of a Seasonally Migrating Marine Copepod |
title_fullStr |
Hydrostatic Pressure and Temperature Effects on the Membranes of a Seasonally Migrating Marine Copepod |
title_full_unstemmed |
Hydrostatic Pressure and Temperature Effects on the Membranes of a Seasonally Migrating Marine Copepod |
title_sort |
hydrostatic pressure and temperature effects on the membranes of a seasonally migrating marine copepod |
publisher |
Public Library of Science (PLoS) |
publishDate |
2014 |
url |
http://hdl.handle.net/1893/28748 https://doi.org/10.1371/journal.pone.0111043 http://dspace.stir.ac.uk/bitstream/1893/28748/1/Pond%20et%20al-PLOS-2015.PDF |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean Copepods |
genre_facet |
Southern Ocean Copepods |
op_relation |
Pond DW, Tarling GA & Mayor DJ (2014) Hydrostatic Pressure and Temperature Effects on the Membranes of a Seasonally Migrating Marine Copepod. PLoS ONE, 9 (10), Art. No.: e111043. https://doi.org/10.1371/journal.pone.0111043 e111043 http://hdl.handle.net/1893/28748 doi:10.1371/journal.pone.0111043 25338196 WOS:000343674800097 2-s2.0-84908375464 1090671 http://dspace.stir.ac.uk/bitstream/1893/28748/1/Pond%20et%20al-PLOS-2015.PDF |
op_rights |
© 2014 Pond et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. http://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1371/journal.pone.0111043 |
container_title |
PLoS ONE |
container_volume |
9 |
container_issue |
10 |
container_start_page |
e111043 |
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1766207420383625216 |