Multiple Trophic Markers Trace Dietary Carbon Sources in Barents Sea Zooplankton During Late Summer
No embargo required. <jats:p>We investigated diets of 24 Barents Sea zooplankton taxa to understand pelagic food-web processes during late summer, including the importance of sea ice algae-produced carbon. This was achieved by combining insights derived from multiple and complementary trophic...
Published in: | Frontiers in Marine Science |
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Main Authors: | , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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Frontiers Media SA
2021
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Online Access: | http://hdl.handle.net/10026.1/16807 https://doi.org/10.3389/fmars.2020.610248 |
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ftunivplympearl:oai:pearl.plymouth.ac.uk:10026.1/16807 |
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ftunivplympearl:oai:pearl.plymouth.ac.uk:10026.1/16807 2023-05-15T15:38:50+02:00 Multiple Trophic Markers Trace Dietary Carbon Sources in Barents Sea Zooplankton During Late Summer Kohlbach, D Hop, H Wold, A Schmidt, K Smik, L Belt, ST Keck Al-Habahbeh, A Woll, M Graeve, M Dąbrowska, AM Tatarek, A Atkinson, A Assmy, P 2021-01-14 0 - 0 http://hdl.handle.net/10026.1/16807 https://doi.org/10.3389/fmars.2020.610248 en eng Frontiers Media SA E-ISSN:2296-7745 610248 http://hdl.handle.net/10026.1/16807 doi:10.3389/fmars.2020.610248 2296-7745 2021-01-21 Not known Journal Article 2021 ftunivplympearl https://doi.org/10.3389/fmars.2020.610248 2021-03-09T18:37:38Z No embargo required. <jats:p>We investigated diets of 24 Barents Sea zooplankton taxa to understand pelagic food-web processes during late summer, including the importance of sea ice algae-produced carbon. This was achieved by combining insights derived from multiple and complementary trophic marker approaches to construct individual aspects of feeding. Specifically, we determined proportions of algal-produced fatty acids (FAs) to reflect the reliance on diatom- versus dinoflagellate-derived carbon, highly branched isoprenoid (HBI) lipids that distinguish between ice-associated and pelagic carbon sources, and sterols to indicate the degree of carnivory. Copepods had the strongest diatom signal based on FAs, while a lack of sea ice algae-associated HBIs (IP<jats:sub>25</jats:sub>, IPSO<jats:sub>25</jats:sub>) suggested that they fed on pelagic rather than ice-associated diatoms. The amphipod <jats:italic>Themisto libellula</jats:italic> and the ctenophores <jats:italic>Beroë cucumis</jats:italic> and <jats:italic>Mertensia ovum</jats:italic> had a higher contribution of dinoflagellate-produced FAs. There was a high degree of carnivory in this food web, as indicated by the FA carnivory index 18:1(<jats:italic>n</jats:italic>−9)/18:1(<jats:italic>n</jats:italic>−7) (mean value < 1 only in the pteropod <jats:italic>Clione limacina</jats:italic>), the presence of copepod-associated FAs in most of the taxa, and the absence of algal-produced HBIs in small copepod taxa, such as <jats:italic>Oithona similis</jats:italic> and <jats:italic>Pseudocalanus</jats:italic> spp. The coherence between concentrations of HBIs and phytosterols within individuals suggested that phytosterols provide a good additional indication for algal ingestion. Sea ice algae-associated HBIs were detected in six zooplankton species (occurring in krill, amphipods, pteropods, and appendicularians), indicating an overall low to moderate contribution of ice-associated carbon from late-summer sea ice to pelagic consumption. The unexpected occurrence of ice-derived HBIs in pteropods and appendicularians, however, suggests an importance of sedimenting ice-derived material at least for filter feeders within the water column at this time of year.</jats:p> Article in Journal/Newspaper Barents Sea Clione limacina ice algae Sea ice Themisto libellula Copepods PEARL (Plymouth Electronic Archiv & ResearchLibrary, Plymouth University) Barents Sea Frontiers in Marine Science 7 |
institution |
Open Polar |
collection |
PEARL (Plymouth Electronic Archiv & ResearchLibrary, Plymouth University) |
op_collection_id |
ftunivplympearl |
language |
English |
description |
No embargo required. <jats:p>We investigated diets of 24 Barents Sea zooplankton taxa to understand pelagic food-web processes during late summer, including the importance of sea ice algae-produced carbon. This was achieved by combining insights derived from multiple and complementary trophic marker approaches to construct individual aspects of feeding. Specifically, we determined proportions of algal-produced fatty acids (FAs) to reflect the reliance on diatom- versus dinoflagellate-derived carbon, highly branched isoprenoid (HBI) lipids that distinguish between ice-associated and pelagic carbon sources, and sterols to indicate the degree of carnivory. Copepods had the strongest diatom signal based on FAs, while a lack of sea ice algae-associated HBIs (IP<jats:sub>25</jats:sub>, IPSO<jats:sub>25</jats:sub>) suggested that they fed on pelagic rather than ice-associated diatoms. The amphipod <jats:italic>Themisto libellula</jats:italic> and the ctenophores <jats:italic>Beroë cucumis</jats:italic> and <jats:italic>Mertensia ovum</jats:italic> had a higher contribution of dinoflagellate-produced FAs. There was a high degree of carnivory in this food web, as indicated by the FA carnivory index 18:1(<jats:italic>n</jats:italic>−9)/18:1(<jats:italic>n</jats:italic>−7) (mean value < 1 only in the pteropod <jats:italic>Clione limacina</jats:italic>), the presence of copepod-associated FAs in most of the taxa, and the absence of algal-produced HBIs in small copepod taxa, such as <jats:italic>Oithona similis</jats:italic> and <jats:italic>Pseudocalanus</jats:italic> spp. The coherence between concentrations of HBIs and phytosterols within individuals suggested that phytosterols provide a good additional indication for algal ingestion. Sea ice algae-associated HBIs were detected in six zooplankton species (occurring in krill, amphipods, pteropods, and appendicularians), indicating an overall low to moderate contribution of ice-associated carbon from late-summer sea ice to pelagic consumption. The unexpected occurrence of ice-derived HBIs in pteropods and appendicularians, however, suggests an importance of sedimenting ice-derived material at least for filter feeders within the water column at this time of year.</jats:p> |
format |
Article in Journal/Newspaper |
author |
Kohlbach, D Hop, H Wold, A Schmidt, K Smik, L Belt, ST Keck Al-Habahbeh, A Woll, M Graeve, M Dąbrowska, AM Tatarek, A Atkinson, A Assmy, P |
spellingShingle |
Kohlbach, D Hop, H Wold, A Schmidt, K Smik, L Belt, ST Keck Al-Habahbeh, A Woll, M Graeve, M Dąbrowska, AM Tatarek, A Atkinson, A Assmy, P Multiple Trophic Markers Trace Dietary Carbon Sources in Barents Sea Zooplankton During Late Summer |
author_facet |
Kohlbach, D Hop, H Wold, A Schmidt, K Smik, L Belt, ST Keck Al-Habahbeh, A Woll, M Graeve, M Dąbrowska, AM Tatarek, A Atkinson, A Assmy, P |
author_sort |
Kohlbach, D |
title |
Multiple Trophic Markers Trace Dietary Carbon Sources in Barents Sea Zooplankton During Late Summer |
title_short |
Multiple Trophic Markers Trace Dietary Carbon Sources in Barents Sea Zooplankton During Late Summer |
title_full |
Multiple Trophic Markers Trace Dietary Carbon Sources in Barents Sea Zooplankton During Late Summer |
title_fullStr |
Multiple Trophic Markers Trace Dietary Carbon Sources in Barents Sea Zooplankton During Late Summer |
title_full_unstemmed |
Multiple Trophic Markers Trace Dietary Carbon Sources in Barents Sea Zooplankton During Late Summer |
title_sort |
multiple trophic markers trace dietary carbon sources in barents sea zooplankton during late summer |
publisher |
Frontiers Media SA |
publishDate |
2021 |
url |
http://hdl.handle.net/10026.1/16807 https://doi.org/10.3389/fmars.2020.610248 |
geographic |
Barents Sea |
geographic_facet |
Barents Sea |
genre |
Barents Sea Clione limacina ice algae Sea ice Themisto libellula Copepods |
genre_facet |
Barents Sea Clione limacina ice algae Sea ice Themisto libellula Copepods |
op_relation |
E-ISSN:2296-7745 610248 http://hdl.handle.net/10026.1/16807 doi:10.3389/fmars.2020.610248 2296-7745 |
op_rights |
2021-01-21 Not known |
op_doi |
https://doi.org/10.3389/fmars.2020.610248 |
container_title |
Frontiers in Marine Science |
container_volume |
7 |
_version_ |
1766370208428064768 |