Uptake of sympagic organic carbon by the Barents Sea benthos linked to sea ice seasonality
On Arctic shelves, where primary production occurs in both the pelagic and sympagic (ice-associated) habitats, sympagic organic material (OM) can constitute a disproportionate fraction of benthic diets due to higher sinking rates and lower grazing pressure than pelagic OM. Less documented is how sym...
Published in: | Frontiers in Marine Science |
---|---|
Main Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Frontiers Media
2022
|
Subjects: | |
Online Access: | https://hdl.handle.net/10037/27931 https://doi.org/10.3389/fmars.2022.1009303 |
id |
ftunivtroemsoe:oai:munin.uit.no:10037/27931 |
---|---|
record_format |
openpolar |
spelling |
ftunivtroemsoe:oai:munin.uit.no:10037/27931 2023-05-15T14:51:56+02:00 Uptake of sympagic organic carbon by the Barents Sea benthos linked to sea ice seasonality Cautain, Ivan J. Last, Kim S. Mckee, David Bluhm, Bodil Renaud, Paul Eric Ziegler, Amanda Narayanaswamy, Bhavani E. 2022-11-11 https://hdl.handle.net/10037/27931 https://doi.org/10.3389/fmars.2022.1009303 eng eng Frontiers Media Frontiers in Marine Science Cautain, Last, Mckee D, Bluhm, Renaud, Ziegler AF, Narayanaswamy. Uptake of sympagic organic carbon by the Barents Sea benthos linked to sea ice seasonality. Frontiers in Marine Science. 2022;9 FRIDAID 2092608 doi:10.3389/fmars.2022.1009303 2296-7745 https://hdl.handle.net/10037/27931 Attribution 4.0 International (CC BY 4.0) openAccess Copyright 2022 The Author(s) https://creativecommons.org/licenses/by/4.0 CC-BY Journal article Tidsskriftartikkel Peer reviewed publishedVersion 2022 ftunivtroemsoe https://doi.org/10.3389/fmars.2022.1009303 2022-12-29T00:02:49Z On Arctic shelves, where primary production occurs in both the pelagic and sympagic (ice-associated) habitats, sympagic organic material (OM) can constitute a disproportionate fraction of benthic diets due to higher sinking rates and lower grazing pressure than pelagic OM. Less documented is how sympagic OM assimilation across feeding guilds varies seasonally and in relation to sea ice duation. We therefore investigated the relative abundance of sympagic vs pelagic OM in Barents Sea shelf megabenthos in the summer and winter of 2018 and 2019, from 10 stations where sea ice duration ranged from 0 to 245 days per year. We use highly branched isoprenoids, which are lipid biomarkers produced with distinct molecular structures by diatoms in sea ice and the water column, to determine the ratio of sympagic-to-pelagic OM assimilated by benthic organisms. From 114 samples of 25 taxa analysed, we found that the proportion of sympagic OM assimilated ranged from 0.4% to 95.8% and correlated strongly (r2 = 0.754) with the duration of sea ice cover. The effect of sea ice duration was more evident in fauna collected during summer than winter, indicating that sympagic signals are more evident in the summer than in the winter at higher latitudes. Our data show that sympagic production can supply a high fraction of carbon for Barents Sea benthos, although this is highly variable and likely dependent on availability and patchiness of sympagic OM deposition. These results are comparable to similar studies conducted on benthos in the Pacific Arctic and highlight the variable importance of sympagic OM in the seasonal ice zone of Arctic inflow shelves, which are the Arctic regions with highest rates of sea ice loss. Article in Journal/Newspaper Arctic Barents Sea Pacific Arctic Sea ice University of Tromsø: Munin Open Research Archive Arctic Barents Sea Pacific Frontiers in Marine Science 9 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
description |
On Arctic shelves, where primary production occurs in both the pelagic and sympagic (ice-associated) habitats, sympagic organic material (OM) can constitute a disproportionate fraction of benthic diets due to higher sinking rates and lower grazing pressure than pelagic OM. Less documented is how sympagic OM assimilation across feeding guilds varies seasonally and in relation to sea ice duation. We therefore investigated the relative abundance of sympagic vs pelagic OM in Barents Sea shelf megabenthos in the summer and winter of 2018 and 2019, from 10 stations where sea ice duration ranged from 0 to 245 days per year. We use highly branched isoprenoids, which are lipid biomarkers produced with distinct molecular structures by diatoms in sea ice and the water column, to determine the ratio of sympagic-to-pelagic OM assimilated by benthic organisms. From 114 samples of 25 taxa analysed, we found that the proportion of sympagic OM assimilated ranged from 0.4% to 95.8% and correlated strongly (r2 = 0.754) with the duration of sea ice cover. The effect of sea ice duration was more evident in fauna collected during summer than winter, indicating that sympagic signals are more evident in the summer than in the winter at higher latitudes. Our data show that sympagic production can supply a high fraction of carbon for Barents Sea benthos, although this is highly variable and likely dependent on availability and patchiness of sympagic OM deposition. These results are comparable to similar studies conducted on benthos in the Pacific Arctic and highlight the variable importance of sympagic OM in the seasonal ice zone of Arctic inflow shelves, which are the Arctic regions with highest rates of sea ice loss. |
format |
Article in Journal/Newspaper |
author |
Cautain, Ivan J. Last, Kim S. Mckee, David Bluhm, Bodil Renaud, Paul Eric Ziegler, Amanda Narayanaswamy, Bhavani E. |
spellingShingle |
Cautain, Ivan J. Last, Kim S. Mckee, David Bluhm, Bodil Renaud, Paul Eric Ziegler, Amanda Narayanaswamy, Bhavani E. Uptake of sympagic organic carbon by the Barents Sea benthos linked to sea ice seasonality |
author_facet |
Cautain, Ivan J. Last, Kim S. Mckee, David Bluhm, Bodil Renaud, Paul Eric Ziegler, Amanda Narayanaswamy, Bhavani E. |
author_sort |
Cautain, Ivan J. |
title |
Uptake of sympagic organic carbon by the Barents Sea benthos linked to sea ice seasonality |
title_short |
Uptake of sympagic organic carbon by the Barents Sea benthos linked to sea ice seasonality |
title_full |
Uptake of sympagic organic carbon by the Barents Sea benthos linked to sea ice seasonality |
title_fullStr |
Uptake of sympagic organic carbon by the Barents Sea benthos linked to sea ice seasonality |
title_full_unstemmed |
Uptake of sympagic organic carbon by the Barents Sea benthos linked to sea ice seasonality |
title_sort |
uptake of sympagic organic carbon by the barents sea benthos linked to sea ice seasonality |
publisher |
Frontiers Media |
publishDate |
2022 |
url |
https://hdl.handle.net/10037/27931 https://doi.org/10.3389/fmars.2022.1009303 |
geographic |
Arctic Barents Sea Pacific |
geographic_facet |
Arctic Barents Sea Pacific |
genre |
Arctic Barents Sea Pacific Arctic Sea ice |
genre_facet |
Arctic Barents Sea Pacific Arctic Sea ice |
op_relation |
Frontiers in Marine Science Cautain, Last, Mckee D, Bluhm, Renaud, Ziegler AF, Narayanaswamy. Uptake of sympagic organic carbon by the Barents Sea benthos linked to sea ice seasonality. Frontiers in Marine Science. 2022;9 FRIDAID 2092608 doi:10.3389/fmars.2022.1009303 2296-7745 https://hdl.handle.net/10037/27931 |
op_rights |
Attribution 4.0 International (CC BY 4.0) openAccess Copyright 2022 The Author(s) https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3389/fmars.2022.1009303 |
container_title |
Frontiers in Marine Science |
container_volume |
9 |
_version_ |
1766323071972540416 |