Data_Sheet_1_Winter Carnivory and Diapause Counteract the Reliance on Ice Algae by Barents Sea Zooplankton.docx
The Barents Sea is a hotspot for environmental change due to its rapid warming, and information on dietary preferences of zooplankton is crucial to better understand the impacts of these changes on food-web dynamics. We combined lipid-based trophic marker approaches, namely analysis of fatty acids (...
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2021
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Online Access: | https://doi.org/10.3389/fmars.2021.640050.s001 https://figshare.com/articles/dataset/Data_Sheet_1_Winter_Carnivory_and_Diapause_Counteract_the_Reliance_on_Ice_Algae_by_Barents_Sea_Zooplankton_docx/14274731 |
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ftfrontimediafig:oai:figshare.com:article/14274731 2023-05-15T15:38:29+02:00 Data_Sheet_1_Winter Carnivory and Diapause Counteract the Reliance on Ice Algae by Barents Sea Zooplankton.docx Doreen Kohlbach Katrin Schmidt Haakon Hop Anette Wold Amalia Keck Al-Habahbeh Simon T. Belt Matthias Woll Martin Graeve Lukas Smik Angus Atkinson Philipp Assmy 2021-03-24T05:17:48Z https://doi.org/10.3389/fmars.2021.640050.s001 https://figshare.com/articles/dataset/Data_Sheet_1_Winter_Carnivory_and_Diapause_Counteract_the_Reliance_on_Ice_Algae_by_Barents_Sea_Zooplankton_docx/14274731 unknown doi:10.3389/fmars.2021.640050.s001 https://figshare.com/articles/dataset/Data_Sheet_1_Winter_Carnivory_and_Diapause_Counteract_the_Reliance_on_Ice_Algae_by_Barents_Sea_Zooplankton_docx/14274731 CC BY 4.0 CC-BY Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering Calanus Themisto Barents Sea sea ice carbon sources trophic markers polar night Dataset 2021 ftfrontimediafig https://doi.org/10.3389/fmars.2021.640050.s001 2021-03-24T23:56:58Z The Barents Sea is a hotspot for environmental change due to its rapid warming, and information on dietary preferences of zooplankton is crucial to better understand the impacts of these changes on food-web dynamics. We combined lipid-based trophic marker approaches, namely analysis of fatty acids (FAs), highly branched isoprenoids (HBIs) and sterols, to compare late summer (August) and early winter (November/December) feeding of key Barents Sea zooplankters; the copepods Calanus glacialis, C. hyperboreus and C. finmarchicus and the amphipods Themisto libellula and T. abyssorum. Based on FAs, copepods showed a stronger reliance on a diatom-based diet. Phytosterols, produced mainly by diatoms, declined from summer to winter in C. glacialis and C. hyperboreus, indicating the strong direct linkage of their feeding to primary production. By contrast, C. finmarchicus showed evidence of year-round feeding, indicated by the higher winter carnivory FA ratios of 18:1(n-9)/18:1(n-7) than its larger congeners. This, plus differences in seasonal lipid dynamics, suggests varied overwintering strategies among the copepods; namely diapause in C. glacialis and C. hyperboreus and continued feeding activity in C. finmarchicus. Based on the absence of sea ice algae-associated HBIs (IP 25 and IPSO 25 ) in the three copepod species during both seasons, their carbon sources were likely primarily of pelagic origin. In both amphipods, increased FA carnivory ratios during winter indicated that they relied strongly on heterotrophic prey during the polar night. Both amphipod species contained sea ice algae-derived HBIs, present in broadly similar concentrations between species and seasons. Our results indicate that sea ice-derived carbon forms a supplementary food rather than a crucial dietary component for these two amphipod species in summer and winter, with carnivory potentially providing them with a degree of resilience to the rapid decline in Barents Sea (winter) sea-ice extent and thickness. The weak trophic link of both zooplankton ... Dataset Barents Sea Calanus glacialis ice algae polar night Sea ice Themisto libellula Copepods Frontiers: Figshare Barents Sea |
institution |
Open Polar |
collection |
Frontiers: Figshare |
op_collection_id |
ftfrontimediafig |
language |
unknown |
topic |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering Calanus Themisto Barents Sea sea ice carbon sources trophic markers polar night |
spellingShingle |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering Calanus Themisto Barents Sea sea ice carbon sources trophic markers polar night Doreen Kohlbach Katrin Schmidt Haakon Hop Anette Wold Amalia Keck Al-Habahbeh Simon T. Belt Matthias Woll Martin Graeve Lukas Smik Angus Atkinson Philipp Assmy Data_Sheet_1_Winter Carnivory and Diapause Counteract the Reliance on Ice Algae by Barents Sea Zooplankton.docx |
topic_facet |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering Calanus Themisto Barents Sea sea ice carbon sources trophic markers polar night |
description |
The Barents Sea is a hotspot for environmental change due to its rapid warming, and information on dietary preferences of zooplankton is crucial to better understand the impacts of these changes on food-web dynamics. We combined lipid-based trophic marker approaches, namely analysis of fatty acids (FAs), highly branched isoprenoids (HBIs) and sterols, to compare late summer (August) and early winter (November/December) feeding of key Barents Sea zooplankters; the copepods Calanus glacialis, C. hyperboreus and C. finmarchicus and the amphipods Themisto libellula and T. abyssorum. Based on FAs, copepods showed a stronger reliance on a diatom-based diet. Phytosterols, produced mainly by diatoms, declined from summer to winter in C. glacialis and C. hyperboreus, indicating the strong direct linkage of their feeding to primary production. By contrast, C. finmarchicus showed evidence of year-round feeding, indicated by the higher winter carnivory FA ratios of 18:1(n-9)/18:1(n-7) than its larger congeners. This, plus differences in seasonal lipid dynamics, suggests varied overwintering strategies among the copepods; namely diapause in C. glacialis and C. hyperboreus and continued feeding activity in C. finmarchicus. Based on the absence of sea ice algae-associated HBIs (IP 25 and IPSO 25 ) in the three copepod species during both seasons, their carbon sources were likely primarily of pelagic origin. In both amphipods, increased FA carnivory ratios during winter indicated that they relied strongly on heterotrophic prey during the polar night. Both amphipod species contained sea ice algae-derived HBIs, present in broadly similar concentrations between species and seasons. Our results indicate that sea ice-derived carbon forms a supplementary food rather than a crucial dietary component for these two amphipod species in summer and winter, with carnivory potentially providing them with a degree of resilience to the rapid decline in Barents Sea (winter) sea-ice extent and thickness. The weak trophic link of both zooplankton ... |
format |
Dataset |
author |
Doreen Kohlbach Katrin Schmidt Haakon Hop Anette Wold Amalia Keck Al-Habahbeh Simon T. Belt Matthias Woll Martin Graeve Lukas Smik Angus Atkinson Philipp Assmy |
author_facet |
Doreen Kohlbach Katrin Schmidt Haakon Hop Anette Wold Amalia Keck Al-Habahbeh Simon T. Belt Matthias Woll Martin Graeve Lukas Smik Angus Atkinson Philipp Assmy |
author_sort |
Doreen Kohlbach |
title |
Data_Sheet_1_Winter Carnivory and Diapause Counteract the Reliance on Ice Algae by Barents Sea Zooplankton.docx |
title_short |
Data_Sheet_1_Winter Carnivory and Diapause Counteract the Reliance on Ice Algae by Barents Sea Zooplankton.docx |
title_full |
Data_Sheet_1_Winter Carnivory and Diapause Counteract the Reliance on Ice Algae by Barents Sea Zooplankton.docx |
title_fullStr |
Data_Sheet_1_Winter Carnivory and Diapause Counteract the Reliance on Ice Algae by Barents Sea Zooplankton.docx |
title_full_unstemmed |
Data_Sheet_1_Winter Carnivory and Diapause Counteract the Reliance on Ice Algae by Barents Sea Zooplankton.docx |
title_sort |
data_sheet_1_winter carnivory and diapause counteract the reliance on ice algae by barents sea zooplankton.docx |
publishDate |
2021 |
url |
https://doi.org/10.3389/fmars.2021.640050.s001 https://figshare.com/articles/dataset/Data_Sheet_1_Winter_Carnivory_and_Diapause_Counteract_the_Reliance_on_Ice_Algae_by_Barents_Sea_Zooplankton_docx/14274731 |
geographic |
Barents Sea |
geographic_facet |
Barents Sea |
genre |
Barents Sea Calanus glacialis ice algae polar night Sea ice Themisto libellula Copepods |
genre_facet |
Barents Sea Calanus glacialis ice algae polar night Sea ice Themisto libellula Copepods |
op_relation |
doi:10.3389/fmars.2021.640050.s001 https://figshare.com/articles/dataset/Data_Sheet_1_Winter_Carnivory_and_Diapause_Counteract_the_Reliance_on_Ice_Algae_by_Barents_Sea_Zooplankton_docx/14274731 |
op_rights |
CC BY 4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3389/fmars.2021.640050.s001 |
_version_ |
1766369441962000384 |