Terrestrial vs. Marine: Discrimination of Hg Sources in Arctic True Seals by a Multi-Isotopic Approach
peer reviewed Intrinsic biogeochemical markers, such as stable isotope ratios of carbon (C), nitrogen (N), sulphur (S) and mercury (Hg) are increasingly used to trace the effects of trophic ecology on Hg accumulation in marine top predators. However, they are often used separately. This leaves the i...
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ftorbi:oai:orbi.ulg.ac.be:2268/264100 2024-04-21T08:00:51+00:00 Terrestrial vs. Marine: Discrimination of Hg Sources in Arctic True Seals by a Multi-Isotopic Approach Belgium Pinzone, Marianna Michel, Loïc Bérail, Sylvain Tessier, Emmanuel Dietz, Rune Eulaers, Igor Nordøy, Erling S. Haug, Tore Desforges, Jean-Pierre Lepoint, Gilles Amouroux, David Das, Krishna FOCUS - Freshwater and OCeanic science Unit of reSearch - ULiège 2021-11-17 https://orbi.uliege.be/handle/2268/264100 en eng https://orbi.uliege.be/handle/2268/264100 info:hdl:2268/264100 restricted access http://purl.org/coar/access_right/c_16ec info:eu-repo/semantics/restrictedAccess SETAC North America 42nd Annual Meeting, Portland, United States [US], from 14-11-2021 to 18-11-2021 Arctic true seals habitat use Hg stable isotopes trophic tracers sea-ice Hg sources Life sciences Environmental sciences & ecology Sciences du vivant Sciences de l’environnement & écologie conference paper not in proceedings http://purl.org/coar/resource_type/c_18cp info:eu-repo/semantics/conferencePaper peer reviewed 2021 ftorbi 2024-03-27T14:58:04Z peer reviewed Intrinsic biogeochemical markers, such as stable isotope ratios of carbon (C), nitrogen (N), sulphur (S) and mercury (Hg) are increasingly used to trace the effects of trophic ecology on Hg accumulation in marine top predators. However, they are often used separately. This leaves the interpretation of the data at times incomplete. Using a multivariate approach could contend with the complexity of the natural world and reveal patterns that would not be detectable by univariate methods. Our main objective was to assess which factor influences the most Hg sourcing in Arctic marine top predators and evaluate the consequences relative to the rates of exposure. We measured THg levels, C, N, S and Hg stable isotopes in three true seal species living in the Greenland Sea: the hooded seal Cystophora cristata, the harp seal Pagophilus groenlandicus and the ringed seal Pusa hispida. They present distinct habitat use, diet and geographical distribution. We integrated all the measured parameters into a multivariate analysis and quantify species multi-isotopic niches (SEAs) with SIBER. The multi-isotopic niches of the three species resulted highly separated. Hooded seals presented the largest multivariate SEA (Mode, 95% CI: 0.93, 0.60 – 1.41), a result of its highly distributed oceanic behaviour. Harp seals presented the second largest SEA (Mode, 95% CI: 0.31, 0.14 – 0.68), while ringed seals presented the smallest niche (Mode, 95% CI: 0.22, 0.14 – 0.37) as a result of its strong territoriality within the Scoresby Sound. Ringed seals presented the highest THg levels (1190±488 ng.g-1 dw), followed by hooded (881±942 ng.g-1 dw) and harp seals (407±289 ng.g-1 dw). Our study showed how habitat use (offshore / bentho-pelagic for Cc vs. offshore / pelagic for Pg vs. coastal / sympagic for Ph) is the most important factor influencing Hg accumulation in Arctic true seals. A species like the ringed seal; which lives in the fjords, on land-fast ice, is more influenced by the enhanced MeHg production typical of these ... Conference Object Cystophora cristata Greenland Greenland Sea Harp Seal hooded seal Pagophilus groenlandicus Pusa hispida ringed seal Scoresby Sound Sea ice University of Liège: ORBi (Open Repository and Bibliography) |
institution |
Open Polar |
collection |
University of Liège: ORBi (Open Repository and Bibliography) |
op_collection_id |
ftorbi |
language |
English |
topic |
Arctic true seals habitat use Hg stable isotopes trophic tracers sea-ice Hg sources Life sciences Environmental sciences & ecology Sciences du vivant Sciences de l’environnement & écologie |
spellingShingle |
Arctic true seals habitat use Hg stable isotopes trophic tracers sea-ice Hg sources Life sciences Environmental sciences & ecology Sciences du vivant Sciences de l’environnement & écologie Pinzone, Marianna Michel, Loïc Bérail, Sylvain Tessier, Emmanuel Dietz, Rune Eulaers, Igor Nordøy, Erling S. Haug, Tore Desforges, Jean-Pierre Lepoint, Gilles Amouroux, David Das, Krishna Terrestrial vs. Marine: Discrimination of Hg Sources in Arctic True Seals by a Multi-Isotopic Approach |
topic_facet |
Arctic true seals habitat use Hg stable isotopes trophic tracers sea-ice Hg sources Life sciences Environmental sciences & ecology Sciences du vivant Sciences de l’environnement & écologie |
description |
peer reviewed Intrinsic biogeochemical markers, such as stable isotope ratios of carbon (C), nitrogen (N), sulphur (S) and mercury (Hg) are increasingly used to trace the effects of trophic ecology on Hg accumulation in marine top predators. However, they are often used separately. This leaves the interpretation of the data at times incomplete. Using a multivariate approach could contend with the complexity of the natural world and reveal patterns that would not be detectable by univariate methods. Our main objective was to assess which factor influences the most Hg sourcing in Arctic marine top predators and evaluate the consequences relative to the rates of exposure. We measured THg levels, C, N, S and Hg stable isotopes in three true seal species living in the Greenland Sea: the hooded seal Cystophora cristata, the harp seal Pagophilus groenlandicus and the ringed seal Pusa hispida. They present distinct habitat use, diet and geographical distribution. We integrated all the measured parameters into a multivariate analysis and quantify species multi-isotopic niches (SEAs) with SIBER. The multi-isotopic niches of the three species resulted highly separated. Hooded seals presented the largest multivariate SEA (Mode, 95% CI: 0.93, 0.60 – 1.41), a result of its highly distributed oceanic behaviour. Harp seals presented the second largest SEA (Mode, 95% CI: 0.31, 0.14 – 0.68), while ringed seals presented the smallest niche (Mode, 95% CI: 0.22, 0.14 – 0.37) as a result of its strong territoriality within the Scoresby Sound. Ringed seals presented the highest THg levels (1190±488 ng.g-1 dw), followed by hooded (881±942 ng.g-1 dw) and harp seals (407±289 ng.g-1 dw). Our study showed how habitat use (offshore / bentho-pelagic for Cc vs. offshore / pelagic for Pg vs. coastal / sympagic for Ph) is the most important factor influencing Hg accumulation in Arctic true seals. A species like the ringed seal; which lives in the fjords, on land-fast ice, is more influenced by the enhanced MeHg production typical of these ... |
author2 |
FOCUS - Freshwater and OCeanic science Unit of reSearch - ULiège |
format |
Conference Object |
author |
Pinzone, Marianna Michel, Loïc Bérail, Sylvain Tessier, Emmanuel Dietz, Rune Eulaers, Igor Nordøy, Erling S. Haug, Tore Desforges, Jean-Pierre Lepoint, Gilles Amouroux, David Das, Krishna |
author_facet |
Pinzone, Marianna Michel, Loïc Bérail, Sylvain Tessier, Emmanuel Dietz, Rune Eulaers, Igor Nordøy, Erling S. Haug, Tore Desforges, Jean-Pierre Lepoint, Gilles Amouroux, David Das, Krishna |
author_sort |
Pinzone, Marianna |
title |
Terrestrial vs. Marine: Discrimination of Hg Sources in Arctic True Seals by a Multi-Isotopic Approach |
title_short |
Terrestrial vs. Marine: Discrimination of Hg Sources in Arctic True Seals by a Multi-Isotopic Approach |
title_full |
Terrestrial vs. Marine: Discrimination of Hg Sources in Arctic True Seals by a Multi-Isotopic Approach |
title_fullStr |
Terrestrial vs. Marine: Discrimination of Hg Sources in Arctic True Seals by a Multi-Isotopic Approach |
title_full_unstemmed |
Terrestrial vs. Marine: Discrimination of Hg Sources in Arctic True Seals by a Multi-Isotopic Approach |
title_sort |
terrestrial vs. marine: discrimination of hg sources in arctic true seals by a multi-isotopic approach |
publishDate |
2021 |
url |
https://orbi.uliege.be/handle/2268/264100 |
genre |
Cystophora cristata Greenland Greenland Sea Harp Seal hooded seal Pagophilus groenlandicus Pusa hispida ringed seal Scoresby Sound Sea ice |
genre_facet |
Cystophora cristata Greenland Greenland Sea Harp Seal hooded seal Pagophilus groenlandicus Pusa hispida ringed seal Scoresby Sound Sea ice |
op_source |
SETAC North America 42nd Annual Meeting, Portland, United States [US], from 14-11-2021 to 18-11-2021 |
op_relation |
https://orbi.uliege.be/handle/2268/264100 info:hdl:2268/264100 |
op_rights |
restricted access http://purl.org/coar/access_right/c_16ec info:eu-repo/semantics/restrictedAccess |
_version_ |
1796941269287567360 |