Seasonal patterns in extracellular ion concentrations and pH of the Arctic copepod Calanus glacialis
Abstract Arctic shelf zooplankton communities are dominated by the copepod Calanus glacialis . This species feeds in surface waters during spring and summer and accumulates large amounts of lipids. Autumn and winter are spent in dormancy in deeper waters. Lipids are believed to play a major role in...
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crwiley:10.1002/lno.10158 2024-06-02T07:58:20+00:00 Seasonal patterns in extracellular ion concentrations and pH of the Arctic copepod Calanus glacialis Freese, Daniela Niehoff, Barbara Søreide, Janne E. Sartoris, Franz Josef Helmholtz Graduate School for Polar and Marine Research 2015 http://dx.doi.org/10.1002/lno.10158 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Flno.10158 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lno.10158 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Limnology and Oceanography volume 60, issue 6, page 2121-2129 ISSN 0024-3590 1939-5590 journal-article 2015 crwiley https://doi.org/10.1002/lno.10158 2024-05-03T10:35:14Z Abstract Arctic shelf zooplankton communities are dominated by the copepod Calanus glacialis . This species feeds in surface waters during spring and summer and accumulates large amounts of lipids. Autumn and winter are spent in dormancy in deeper waters. Lipids are believed to play a major role in regulating buoyancy, however, they cannot explain fine‐tuning of the depth distribution. To investigate whether ion exchange processes and acid‐base regulation support ontogenetic migration as suggested for Antarctic copepods, we sampled C. glacialis in monthly intervals for 1 yr in a high‐Arctic fjord and determined cation concentrations and the extracellular pH (pH e ) in its hemolymph. During the winter/spring transition, prior to the upward migration of the copepods, Li + ions were exchanged with cations (Na + , Mg 2+ , and Ca 2+ ) leading to Li + concentrations of 197 mmol L −1 . This likely decreased the density and promoted upward migration in C. glacialis . Our data thus suggest that Li + has a biological function in this species. Ion and pH e regulation in the hemolymph were not directly correlated, but the pH e revealed a seasonal pattern and was low (5.5) in winter and high (7.9) in summer. Low pH e during overwintering might be related to metabolic depression and thus, support diapause. Article in Journal/Newspaper Antarc* Antarctic Arctic copepod Arctic Calanus glacialis Zooplankton Copepods Wiley Online Library Arctic Antarctic Limnology and Oceanography 60 6 2121 2129 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Arctic shelf zooplankton communities are dominated by the copepod Calanus glacialis . This species feeds in surface waters during spring and summer and accumulates large amounts of lipids. Autumn and winter are spent in dormancy in deeper waters. Lipids are believed to play a major role in regulating buoyancy, however, they cannot explain fine‐tuning of the depth distribution. To investigate whether ion exchange processes and acid‐base regulation support ontogenetic migration as suggested for Antarctic copepods, we sampled C. glacialis in monthly intervals for 1 yr in a high‐Arctic fjord and determined cation concentrations and the extracellular pH (pH e ) in its hemolymph. During the winter/spring transition, prior to the upward migration of the copepods, Li + ions were exchanged with cations (Na + , Mg 2+ , and Ca 2+ ) leading to Li + concentrations of 197 mmol L −1 . This likely decreased the density and promoted upward migration in C. glacialis . Our data thus suggest that Li + has a biological function in this species. Ion and pH e regulation in the hemolymph were not directly correlated, but the pH e revealed a seasonal pattern and was low (5.5) in winter and high (7.9) in summer. Low pH e during overwintering might be related to metabolic depression and thus, support diapause. |
author2 |
Helmholtz Graduate School for Polar and Marine Research |
format |
Article in Journal/Newspaper |
author |
Freese, Daniela Niehoff, Barbara Søreide, Janne E. Sartoris, Franz Josef |
spellingShingle |
Freese, Daniela Niehoff, Barbara Søreide, Janne E. Sartoris, Franz Josef Seasonal patterns in extracellular ion concentrations and pH of the Arctic copepod Calanus glacialis |
author_facet |
Freese, Daniela Niehoff, Barbara Søreide, Janne E. Sartoris, Franz Josef |
author_sort |
Freese, Daniela |
title |
Seasonal patterns in extracellular ion concentrations and pH of the Arctic copepod Calanus glacialis |
title_short |
Seasonal patterns in extracellular ion concentrations and pH of the Arctic copepod Calanus glacialis |
title_full |
Seasonal patterns in extracellular ion concentrations and pH of the Arctic copepod Calanus glacialis |
title_fullStr |
Seasonal patterns in extracellular ion concentrations and pH of the Arctic copepod Calanus glacialis |
title_full_unstemmed |
Seasonal patterns in extracellular ion concentrations and pH of the Arctic copepod Calanus glacialis |
title_sort |
seasonal patterns in extracellular ion concentrations and ph of the arctic copepod calanus glacialis |
publisher |
Wiley |
publishDate |
2015 |
url |
http://dx.doi.org/10.1002/lno.10158 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Flno.10158 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lno.10158 |
geographic |
Arctic Antarctic |
geographic_facet |
Arctic Antarctic |
genre |
Antarc* Antarctic Arctic copepod Arctic Calanus glacialis Zooplankton Copepods |
genre_facet |
Antarc* Antarctic Arctic copepod Arctic Calanus glacialis Zooplankton Copepods |
op_source |
Limnology and Oceanography volume 60, issue 6, page 2121-2129 ISSN 0024-3590 1939-5590 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/lno.10158 |
container_title |
Limnology and Oceanography |
container_volume |
60 |
container_issue |
6 |
container_start_page |
2121 |
op_container_end_page |
2129 |
_version_ |
1800741640110866432 |