Arctic pelagic amphipods: lipid dynamics and life strategy
Polar regions are characterized by a strong seasonality in primary production and distinct fluctuations in food supply. The storage of energy in the form of lipids is expected to follow a seasonal pattern; however, year-round observations are lacking. The seasonal variations of lipid classes and fat...
Published in: | Journal of Plankton Research |
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plankt.oxfordjournals.org
2015
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Online Access: | https://epic.awi.de/id/eprint/38479/ https://epic.awi.de/id/eprint/38479/1/fbv052.pdf https://epic.awi.de/id/eprint/38479/6/Arctic-pelagic-amphipods-Lipid-dynamics-and-life-strategy_2014_Journal-of-Plankton-Research.pdf https://doi.org/10.1093/plankt/fbv052 https://hdl.handle.net/10013/epic.46207 https://hdl.handle.net/10013/epic.46207.d001 https://hdl.handle.net/10013/epic.46207.d006 |
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ftawi:oai:epic.awi.de:38479 2024-09-15T17:50:41+00:00 Arctic pelagic amphipods: lipid dynamics and life strategy Kraft, Angelina Graeve, Martin Janssen, Dieter Greenacre, Michael Falk-Petersen, Stig 2015-07-08 application/pdf https://epic.awi.de/id/eprint/38479/ https://epic.awi.de/id/eprint/38479/1/fbv052.pdf https://epic.awi.de/id/eprint/38479/6/Arctic-pelagic-amphipods-Lipid-dynamics-and-life-strategy_2014_Journal-of-Plankton-Research.pdf https://doi.org/10.1093/plankt/fbv052 https://hdl.handle.net/10013/epic.46207 https://hdl.handle.net/10013/epic.46207.d001 https://hdl.handle.net/10013/epic.46207.d006 unknown plankt.oxfordjournals.org https://epic.awi.de/id/eprint/38479/1/fbv052.pdf https://hdl.handle.net/10013/epic.46207.d001 https://epic.awi.de/id/eprint/38479/6/Arctic-pelagic-amphipods-Lipid-dynamics-and-life-strategy_2014_Journal-of-Plankton-Research.pdf https://hdl.handle.net/10013/epic.46207.d006 Kraft, A. , Graeve, M. orcid:0000-0002-2294-1915 , Janssen, D. , Greenacre, M. and Falk-Petersen, S. (2015) Arctic pelagic amphipods: lipid dynamics and life strategy , Journal of Plankton Research, 37 (4), pp. 790-807 . doi:10.1093/plankt/fbv052 <https://doi.org/10.1093/plankt%2Ffbv052> , hdl:10013/epic.46207 EPIC3Journal of Plankton Research, plankt.oxfordjournals.org, 37(4), pp. 790-807, ISSN: 0142-7873 Article isiRev 2015 ftawi https://doi.org/10.1093/plankt/fbv052 2024-06-24T04:12:21Z Polar regions are characterized by a strong seasonality in primary production and distinct fluctuations in food supply. The storage of energy in the form of lipids is expected to follow a seasonal pattern; however, year-round observations are lacking. The seasonal variations of lipid classes and fatty acid compositions of four pelagic amphipods have been investigated. Individuals were collected at various depths during summer and winter expeditions to the Fram Strait and Svalbard archipelago (788–818N). Our results show a year-round dominance of wax esters and triacylglycerols over phospholipids for Themisto abyssorum, Themisto libellula, Themisto compressa and Cyclocaris guilelmi. High levels of the Calanus-marker fatty acids 20:1 and 22:1 (both isomers) during summer and winter indicated that all four species are part of the Calanus-based food web. Specific fatty acid trophic markers for diatoms and flagellates indicated that the lipid-based energy transfer could be traced back to the respective algal sources.We found a distinct difference between animals collected from very deep and shallow waters, which indicates that the lipid reservoir of these amphipods and their biochemical modifications seem to buffer seasonal variations in available prey and to allow an active, predatory life-style year-round in Arctic waters. Article in Journal/Newspaper Arctic Cyclocaris Cyclocaris guilelmi Fram Strait Svalbard Themisto abyssorum Themisto Themisto libellula Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Journal of Plankton Research 37 4 790 807 |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Polar regions are characterized by a strong seasonality in primary production and distinct fluctuations in food supply. The storage of energy in the form of lipids is expected to follow a seasonal pattern; however, year-round observations are lacking. The seasonal variations of lipid classes and fatty acid compositions of four pelagic amphipods have been investigated. Individuals were collected at various depths during summer and winter expeditions to the Fram Strait and Svalbard archipelago (788–818N). Our results show a year-round dominance of wax esters and triacylglycerols over phospholipids for Themisto abyssorum, Themisto libellula, Themisto compressa and Cyclocaris guilelmi. High levels of the Calanus-marker fatty acids 20:1 and 22:1 (both isomers) during summer and winter indicated that all four species are part of the Calanus-based food web. Specific fatty acid trophic markers for diatoms and flagellates indicated that the lipid-based energy transfer could be traced back to the respective algal sources.We found a distinct difference between animals collected from very deep and shallow waters, which indicates that the lipid reservoir of these amphipods and their biochemical modifications seem to buffer seasonal variations in available prey and to allow an active, predatory life-style year-round in Arctic waters. |
format |
Article in Journal/Newspaper |
author |
Kraft, Angelina Graeve, Martin Janssen, Dieter Greenacre, Michael Falk-Petersen, Stig |
spellingShingle |
Kraft, Angelina Graeve, Martin Janssen, Dieter Greenacre, Michael Falk-Petersen, Stig Arctic pelagic amphipods: lipid dynamics and life strategy |
author_facet |
Kraft, Angelina Graeve, Martin Janssen, Dieter Greenacre, Michael Falk-Petersen, Stig |
author_sort |
Kraft, Angelina |
title |
Arctic pelagic amphipods: lipid dynamics and life strategy |
title_short |
Arctic pelagic amphipods: lipid dynamics and life strategy |
title_full |
Arctic pelagic amphipods: lipid dynamics and life strategy |
title_fullStr |
Arctic pelagic amphipods: lipid dynamics and life strategy |
title_full_unstemmed |
Arctic pelagic amphipods: lipid dynamics and life strategy |
title_sort |
arctic pelagic amphipods: lipid dynamics and life strategy |
publisher |
plankt.oxfordjournals.org |
publishDate |
2015 |
url |
https://epic.awi.de/id/eprint/38479/ https://epic.awi.de/id/eprint/38479/1/fbv052.pdf https://epic.awi.de/id/eprint/38479/6/Arctic-pelagic-amphipods-Lipid-dynamics-and-life-strategy_2014_Journal-of-Plankton-Research.pdf https://doi.org/10.1093/plankt/fbv052 https://hdl.handle.net/10013/epic.46207 https://hdl.handle.net/10013/epic.46207.d001 https://hdl.handle.net/10013/epic.46207.d006 |
genre |
Arctic Cyclocaris Cyclocaris guilelmi Fram Strait Svalbard Themisto abyssorum Themisto Themisto libellula |
genre_facet |
Arctic Cyclocaris Cyclocaris guilelmi Fram Strait Svalbard Themisto abyssorum Themisto Themisto libellula |
op_source |
EPIC3Journal of Plankton Research, plankt.oxfordjournals.org, 37(4), pp. 790-807, ISSN: 0142-7873 |
op_relation |
https://epic.awi.de/id/eprint/38479/1/fbv052.pdf https://hdl.handle.net/10013/epic.46207.d001 https://epic.awi.de/id/eprint/38479/6/Arctic-pelagic-amphipods-Lipid-dynamics-and-life-strategy_2014_Journal-of-Plankton-Research.pdf https://hdl.handle.net/10013/epic.46207.d006 Kraft, A. , Graeve, M. orcid:0000-0002-2294-1915 , Janssen, D. , Greenacre, M. and Falk-Petersen, S. (2015) Arctic pelagic amphipods: lipid dynamics and life strategy , Journal of Plankton Research, 37 (4), pp. 790-807 . doi:10.1093/plankt/fbv052 <https://doi.org/10.1093/plankt%2Ffbv052> , hdl:10013/epic.46207 |
op_doi |
https://doi.org/10.1093/plankt/fbv052 |
container_title |
Journal of Plankton Research |
container_volume |
37 |
container_issue |
4 |
container_start_page |
790 |
op_container_end_page |
807 |
_version_ |
1810292492152602624 |