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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Online Access: | http://nora.nerc.ac.uk/id/eprint/508728/ https://nora.nerc.ac.uk/id/eprint/508728/1/Pond.pdf https://doi.org/10.1371/journal.pone.0111043 |
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ftnerc:oai:nora.nerc.ac.uk:508728 2023-05-15T18:25:42+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 2014-10 text http://nora.nerc.ac.uk/id/eprint/508728/ https://nora.nerc.ac.uk/id/eprint/508728/1/Pond.pdf https://doi.org/10.1371/journal.pone.0111043 en eng Public Library of Science https://nora.nerc.ac.uk/id/eprint/508728/1/Pond.pdf Pond, David W.; Tarling, Geraint A. orcid:0000-0002-3753-5899 Mayor, Daniel J orcid:0000-0002-1295-0041 . 2014 Hydrostatic Pressure and Temperature Effects on the Membranes of a Seasonally Migrating Marine Copepod. PLoS ONE, 9 (10), e111043. 9, pp. https://doi.org/10.1371/journal.pone.0111043 <https://doi.org/10.1371/journal.pone.0111043> cc_by CC-BY Publication - Article PeerReviewed 2014 ftnerc https://doi.org/10.1371/journal.pone.0111043 2023-02-04T19:40:27Z 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 Natural Environment Research Council: NERC Open Research Archive Southern Ocean PLoS ONE 9 10 e111043 |
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Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
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ftnerc |
language |
English |
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. |
format |
Article in Journal/Newspaper |
author |
Pond, David W. Tarling, Geraint A. Mayor, Daniel J |
spellingShingle |
Pond, David W. Tarling, Geraint A. Mayor, Daniel J Hydrostatic Pressure and Temperature Effects on the Membranes of a Seasonally Migrating Marine Copepod |
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 |
publishDate |
2014 |
url |
http://nora.nerc.ac.uk/id/eprint/508728/ https://nora.nerc.ac.uk/id/eprint/508728/1/Pond.pdf https://doi.org/10.1371/journal.pone.0111043 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean Copepods |
genre_facet |
Southern Ocean Copepods |
op_relation |
https://nora.nerc.ac.uk/id/eprint/508728/1/Pond.pdf Pond, David W.; Tarling, Geraint A. orcid:0000-0002-3753-5899 Mayor, Daniel J orcid:0000-0002-1295-0041 . 2014 Hydrostatic Pressure and Temperature Effects on the Membranes of a Seasonally Migrating Marine Copepod. PLoS ONE, 9 (10), e111043. 9, pp. https://doi.org/10.1371/journal.pone.0111043 <https://doi.org/10.1371/journal.pone.0111043> |
op_rights |
cc_by |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1371/journal.pone.0111043 |
container_title |
PLoS ONE |
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9 |
container_issue |
10 |
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e111043 |
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1766207316373274624 |