Reliance of deep-sea benthic macrofauna on ice-derived organic matter highlighted by multiple trophic markers during spring in Baffin Bay, Canadian Arctic
Benthic organisms depend primarily on seasonal pulses of organic matter from primary producers. In the Arctic, declines in sea ice due to warming climate could lead to changes in this food supply with as yet unknown effects on benthic trophic dynamics. Benthic consumer diets and food web structure w...
Published in: | Elementa: Science of the Anthropocene |
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Format: | Article in Journal/Newspaper |
Language: | English |
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2020
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Online Access: | https://pure.uhi.ac.uk/en/publications/0e56272a-e95c-497a-8b8f-3a3dd1855390 https://doi.org/10.1525/elementa.2020.047 https://pureadmin.uhi.ac.uk/ws/files/15799158/elementa.2020.047.pdf https://online.ucpress.edu/elementa/article/doi/10.1525/elementa.2020.047/114544/Reliance-of-deepsea-benthic-macrofauna-on |
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ftuhipublicatio:oai:pure.atira.dk:publications/0e56272a-e95c-497a-8b8f-3a3dd1855390 2024-02-04T09:56:40+01:00 Reliance of deep-sea benthic macrofauna on ice-derived organic matter highlighted by multiple trophic markers during spring in Baffin Bay, Canadian Arctic Yunda-guarin, Gustavo Brown, Thomas A. Michel, Loïc N. Saint-béat, Blanche Amiraux, Rémi Nozais, Christian Archambault, Philippe 2020-12-11 application/pdf https://pure.uhi.ac.uk/en/publications/0e56272a-e95c-497a-8b8f-3a3dd1855390 https://doi.org/10.1525/elementa.2020.047 https://pureadmin.uhi.ac.uk/ws/files/15799158/elementa.2020.047.pdf https://online.ucpress.edu/elementa/article/doi/10.1525/elementa.2020.047/114544/Reliance-of-deepsea-benthic-macrofauna-on eng eng info:eu-repo/semantics/openAccess Yunda-guarin , G , Brown , T A , Michel , L N , Saint-béat , B , Amiraux , R , Nozais , C & Archambault , P 2020 , ' Reliance of deep-sea benthic macrofauna on ice-derived organic matter highlighted by multiple trophic markers during spring in Baffin Bay, Canadian Arctic ' , Elementa: Science of the Anthropocene , vol. 8 , no. 1 . https://doi.org/10.1525/elementa.2020.047 Benthic food webs Trophic markers Sea-ice algae Climate change HBIs Stable isotopes Baffin Bay Arctic Ocean article 2020 ftuhipublicatio https://doi.org/10.1525/elementa.2020.047 2024-01-11T23:21:31Z Benthic organisms depend primarily on seasonal pulses of organic matter from primary producers. In the Arctic, declines in sea ice due to warming climate could lead to changes in this food supply with as yet unknown effects on benthic trophic dynamics. Benthic consumer diets and food web structure were studied in a seasonally ice-covered region of Baffin Bay during spring 2016 at stations ranging in depth from 199 to 2,111 m. We used a novel combination of highly branched isoprenoid (HBI) lipid biomarkers and stable isotope ratios (δ13C, δ15N) to better understand the relationship between the availability of carbon sources in spring on the seafloor and their assimilation and transfer within the benthic food web. Organic carbon from sea ice (sympagic carbon [SC]) was an important food source for benthic consumers. The lipid biomarker analyses revealed a high relative contribution of SC in sediments (mean SC% ± standard deviation [SD] = 86% ± 16.0, n = 17) and in benthic consumer tissues (mean SC% ± SD = 78% ± 19.7, n = 159). We also detected an effect of sea-ice concentration on the relative contribution of SC in sediment and in benthic consumers. Cluster analysis separated the study region into three different zones according to the relative proportions of SC assimilated by benthic macrofauna. We observed variation of the benthic food web between zones, with increases in the width of the ecological niche in zones with less sea-ice concentration, indicating greater diversity of carbon sources assimilated by consumers. In zones with greater sea-ice concentration, the higher availability of SC increased the ecological role that primary consumers play in driving a stronger transfer of nutrients to higher trophic levels. Based on our results, SC is an important energy source for Arctic deep-sea benthos in Baffin Bay, such that changes in spring sea-ice phenology could alter benthic food-web structure Article in Journal/Newspaper Arctic Arctic Arctic Ocean Baffin Bay Baffin Bay Baffin Climate change ice algae Sea ice University of the Highlands and Islands: Research Database of UHI Arctic Arctic Ocean Baffin Bay Elementa: Science of the Anthropocene 8 1 |
institution |
Open Polar |
collection |
University of the Highlands and Islands: Research Database of UHI |
op_collection_id |
ftuhipublicatio |
language |
English |
topic |
Benthic food webs Trophic markers Sea-ice algae Climate change HBIs Stable isotopes Baffin Bay Arctic Ocean |
spellingShingle |
Benthic food webs Trophic markers Sea-ice algae Climate change HBIs Stable isotopes Baffin Bay Arctic Ocean Yunda-guarin, Gustavo Brown, Thomas A. Michel, Loïc N. Saint-béat, Blanche Amiraux, Rémi Nozais, Christian Archambault, Philippe Reliance of deep-sea benthic macrofauna on ice-derived organic matter highlighted by multiple trophic markers during spring in Baffin Bay, Canadian Arctic |
topic_facet |
Benthic food webs Trophic markers Sea-ice algae Climate change HBIs Stable isotopes Baffin Bay Arctic Ocean |
description |
Benthic organisms depend primarily on seasonal pulses of organic matter from primary producers. In the Arctic, declines in sea ice due to warming climate could lead to changes in this food supply with as yet unknown effects on benthic trophic dynamics. Benthic consumer diets and food web structure were studied in a seasonally ice-covered region of Baffin Bay during spring 2016 at stations ranging in depth from 199 to 2,111 m. We used a novel combination of highly branched isoprenoid (HBI) lipid biomarkers and stable isotope ratios (δ13C, δ15N) to better understand the relationship between the availability of carbon sources in spring on the seafloor and their assimilation and transfer within the benthic food web. Organic carbon from sea ice (sympagic carbon [SC]) was an important food source for benthic consumers. The lipid biomarker analyses revealed a high relative contribution of SC in sediments (mean SC% ± standard deviation [SD] = 86% ± 16.0, n = 17) and in benthic consumer tissues (mean SC% ± SD = 78% ± 19.7, n = 159). We also detected an effect of sea-ice concentration on the relative contribution of SC in sediment and in benthic consumers. Cluster analysis separated the study region into three different zones according to the relative proportions of SC assimilated by benthic macrofauna. We observed variation of the benthic food web between zones, with increases in the width of the ecological niche in zones with less sea-ice concentration, indicating greater diversity of carbon sources assimilated by consumers. In zones with greater sea-ice concentration, the higher availability of SC increased the ecological role that primary consumers play in driving a stronger transfer of nutrients to higher trophic levels. Based on our results, SC is an important energy source for Arctic deep-sea benthos in Baffin Bay, such that changes in spring sea-ice phenology could alter benthic food-web structure |
format |
Article in Journal/Newspaper |
author |
Yunda-guarin, Gustavo Brown, Thomas A. Michel, Loïc N. Saint-béat, Blanche Amiraux, Rémi Nozais, Christian Archambault, Philippe |
author_facet |
Yunda-guarin, Gustavo Brown, Thomas A. Michel, Loïc N. Saint-béat, Blanche Amiraux, Rémi Nozais, Christian Archambault, Philippe |
author_sort |
Yunda-guarin, Gustavo |
title |
Reliance of deep-sea benthic macrofauna on ice-derived organic matter highlighted by multiple trophic markers during spring in Baffin Bay, Canadian Arctic |
title_short |
Reliance of deep-sea benthic macrofauna on ice-derived organic matter highlighted by multiple trophic markers during spring in Baffin Bay, Canadian Arctic |
title_full |
Reliance of deep-sea benthic macrofauna on ice-derived organic matter highlighted by multiple trophic markers during spring in Baffin Bay, Canadian Arctic |
title_fullStr |
Reliance of deep-sea benthic macrofauna on ice-derived organic matter highlighted by multiple trophic markers during spring in Baffin Bay, Canadian Arctic |
title_full_unstemmed |
Reliance of deep-sea benthic macrofauna on ice-derived organic matter highlighted by multiple trophic markers during spring in Baffin Bay, Canadian Arctic |
title_sort |
reliance of deep-sea benthic macrofauna on ice-derived organic matter highlighted by multiple trophic markers during spring in baffin bay, canadian arctic |
publishDate |
2020 |
url |
https://pure.uhi.ac.uk/en/publications/0e56272a-e95c-497a-8b8f-3a3dd1855390 https://doi.org/10.1525/elementa.2020.047 https://pureadmin.uhi.ac.uk/ws/files/15799158/elementa.2020.047.pdf https://online.ucpress.edu/elementa/article/doi/10.1525/elementa.2020.047/114544/Reliance-of-deepsea-benthic-macrofauna-on |
geographic |
Arctic Arctic Ocean Baffin Bay |
geographic_facet |
Arctic Arctic Ocean Baffin Bay |
genre |
Arctic Arctic Arctic Ocean Baffin Bay Baffin Bay Baffin Climate change ice algae Sea ice |
genre_facet |
Arctic Arctic Arctic Ocean Baffin Bay Baffin Bay Baffin Climate change ice algae Sea ice |
op_source |
Yunda-guarin , G , Brown , T A , Michel , L N , Saint-béat , B , Amiraux , R , Nozais , C & Archambault , P 2020 , ' Reliance of deep-sea benthic macrofauna on ice-derived organic matter highlighted by multiple trophic markers during spring in Baffin Bay, Canadian Arctic ' , Elementa: Science of the Anthropocene , vol. 8 , no. 1 . https://doi.org/10.1525/elementa.2020.047 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1525/elementa.2020.047 |
container_title |
Elementa: Science of the Anthropocene |
container_volume |
8 |
container_issue |
1 |
_version_ |
1789961073203347456 |