Reliance of deep-sea benthic macrofauna on ice-derived organic matter highlighted by multiple trophic markers during spring in Baffin Bay, Canadian Arctic
peer reviewed 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 w...
Published in: | Elementa: Science of the Anthropocene |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Online Access: | https://orbi.uliege.be/handle/2268/255060 https://orbi.uliege.be/bitstream/2268/255060/1/elementa.2020.047.pdf https://doi.org/10.1525/elementa.2020.047 |
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ftorbi:oai:orbi.ulg.ac.be:2268/255060 2024-04-21T07:56:01+00:00 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 Saint-Béat, Blanche Amiraux, Rémi Nozais, Christian Archambault, Philippe FOCUS - Freshwater and OCeanic science Unit of reSearch - ULiège MARE - Centre Interfacultaire de Recherches en Océanologie - ULiège 2020-12-11 https://orbi.uliege.be/handle/2268/255060 https://orbi.uliege.be/bitstream/2268/255060/1/elementa.2020.047.pdf https://doi.org/10.1525/elementa.2020.047 en eng BioOne https://doi.org/10.1525/elementa.2020.047 urn:issn:2325-1026 https://orbi.uliege.be/handle/2268/255060 info:hdl:2268/255060 https://orbi.uliege.be/bitstream/2268/255060/1/elementa.2020.047.pdf doi:10.1525/elementa.2020.047 scopus-id:2-s2.0-85104859193 open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess Elementa: Science of the Anthropocene, 8 (1), 047 (2020-12-11) Benthic food webs Trophic markers Sea-ice algae Climate change Highly Branched Isoprenoids Stable isotopes Baffin Bay Arctic Ocean Life sciences Environmental sciences & ecology Zoology Aquatic sciences & oceanology Sciences du vivant Sciences de l’environnement & écologie Zoologie Sciences aquatiques & océanologie journal article http://purl.org/coar/resource_type/c_6501 info:eu-repo/semantics/article peer reviewed 2020 ftorbi https://doi.org/10.1525/elementa.2020.047 2024-03-27T14:59:50Z peer reviewed 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. Green Edge Article in Journal/Newspaper Arctic Ocean Baffin Bay Baffin Bay Baffin Climate change ice algae Sea ice University of Liège: ORBi (Open Repository and Bibliography) Elementa: Science of the Anthropocene 8 1 |
institution |
Open Polar |
collection |
University of Liège: ORBi (Open Repository and Bibliography) |
op_collection_id |
ftorbi |
language |
English |
topic |
Benthic food webs Trophic markers Sea-ice algae Climate change Highly Branched Isoprenoids Stable isotopes Baffin Bay Arctic Ocean Life sciences Environmental sciences & ecology Zoology Aquatic sciences & oceanology Sciences du vivant Sciences de l’environnement & écologie Zoologie Sciences aquatiques & océanologie |
spellingShingle |
Benthic food webs Trophic markers Sea-ice algae Climate change Highly Branched Isoprenoids Stable isotopes Baffin Bay Arctic Ocean Life sciences Environmental sciences & ecology Zoology Aquatic sciences & oceanology Sciences du vivant Sciences de l’environnement & écologie Zoologie Sciences aquatiques & océanologie Yunda-Guarin, Gustavo Brown, Thomas A. Michel, Loïc 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 Highly Branched Isoprenoids Stable isotopes Baffin Bay Arctic Ocean Life sciences Environmental sciences & ecology Zoology Aquatic sciences & oceanology Sciences du vivant Sciences de l’environnement & écologie Zoologie Sciences aquatiques & océanologie |
description |
peer reviewed 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. Green Edge |
author2 |
FOCUS - Freshwater and OCeanic science Unit of reSearch - ULiège MARE - Centre Interfacultaire de Recherches en Océanologie - ULiège |
format |
Article in Journal/Newspaper |
author |
Yunda-Guarin, Gustavo Brown, Thomas A. Michel, Loïc Saint-Béat, Blanche Amiraux, Rémi Nozais, Christian Archambault, Philippe |
author_facet |
Yunda-Guarin, Gustavo Brown, Thomas A. Michel, Loïc 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 |
publisher |
BioOne |
publishDate |
2020 |
url |
https://orbi.uliege.be/handle/2268/255060 https://orbi.uliege.be/bitstream/2268/255060/1/elementa.2020.047.pdf https://doi.org/10.1525/elementa.2020.047 |
genre |
Arctic Ocean Baffin Bay Baffin Bay Baffin Climate change ice algae Sea ice |
genre_facet |
Arctic Ocean Baffin Bay Baffin Bay Baffin Climate change ice algae Sea ice |
op_source |
Elementa: Science of the Anthropocene, 8 (1), 047 (2020-12-11) |
op_relation |
https://doi.org/10.1525/elementa.2020.047 urn:issn:2325-1026 https://orbi.uliege.be/handle/2268/255060 info:hdl:2268/255060 https://orbi.uliege.be/bitstream/2268/255060/1/elementa.2020.047.pdf doi:10.1525/elementa.2020.047 scopus-id:2-s2.0-85104859193 |
op_rights |
open access http://purl.org/coar/access_right/c_abf2 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_ |
1796938197738979328 |