Horizontal and vertical food web structure drives trace element trophic transfer in Terra Nova Bay, Antarctica
Despite a vast amount of literature has focused on trace element (TE) contamination in Antarctica during the last decades, the assessment of the main pathways driving TE transfer to the biota is still an overlooked issue. This limits the ability to predict how variations in sea-ice dynamics and prod...
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Online Access: | https://hdl.handle.net/11573/1290051 https://doi.org/10.1016/j.envpol.2018.12.071 |
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ftunivromairis:oai:iris.uniroma1.it:11573/1290051 2024-06-23T07:47:47+00:00 Horizontal and vertical food web structure drives trace element trophic transfer in Terra Nova Bay, Antarctica Signa G. Calizza E. Costantini M. L. Tramati C. Sporta Caputi S. Mazzola A. Rossi L. Vizzini S. Signa, G. Calizza, E. Costantini, M. L. Tramati, C. Sporta Caputi, S. Mazzola, A. Rossi, L. Vizzini, S. 2019 https://hdl.handle.net/11573/1290051 https://doi.org/10.1016/j.envpol.2018.12.071 eng eng Elsevier Ltd place:Oxford info:eu-repo/semantics/altIdentifier/pmid/30623833 info:eu-repo/semantics/altIdentifier/wos/WOS:000458222100088 volume:246 firstpage:772 lastpage:781 numberofpages:10 journal:ENVIRONMENTAL POLLUTION https://hdl.handle.net/11573/1290051 doi:10.1016/j.envpol.2018.12.071 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85060034539 info:eu-repo/semantics/closedAccess biomagnification metal polar stable isotope sympagic algae animal Antarctic region Bayes theorem bay biota environmental monitoring fishe invertebrate trace element water pollutant chemical zooplankton food chain info:eu-repo/semantics/article 2019 ftunivromairis https://doi.org/10.1016/j.envpol.2018.12.071 2024-06-10T23:45:11Z Despite a vast amount of literature has focused on trace element (TE) contamination in Antarctica during the last decades, the assessment of the main pathways driving TE transfer to the biota is still an overlooked issue. This limits the ability to predict how variations in sea-ice dynamics and productivity due to climate change will affect TE allocation in the food web. Here, food web structure of Tethys Bay (Terra Nova Bay, Ross Sea, Antarctica) was first characterised by analysing carbon and nitrogen stable isotopes (δ 13 C, δ 15 N) in organic matter sources (sediment and planktonic, benthic and sympagic primary producers) and consumers (zooplankton, benthic invertebrates, fish and birds). Diet and trophic position were also characterised using Bayesian mixing models. Then, relationships between stable isotopes, diet and TEs (Cd, Cr, Co, Cu, Hg, Ni, Pb and V) were assessed in order to evaluate if and how horizontal (organic matter pathways) and vertical (trophic position) food web features influence TE transfer to the biota. Regressions between log[TE] and δ 13 C revealed that the sympagic pathway drives accumulation of V in primary consumers and Cd and Hg in secondary consumers, and that a coupled benthic/pelagic pathway drives Pb transfer to all consumers. Regressions between log[TE] and δ 15 N showed that only Hg biomagnifies across trophic levels, while all the others TEs showed a biodilution pattern, consistent with patterns observed in temperate food webs. Although the Cd behavior needs further investigations, the present findings provide new insights about the role of basal sources in the transfer of TEs in polar systems. This is especially important nowadays in light of the forecasted trophic changes potentially resulting from climate change-induced modification of sea-ice dynamics. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ross Sea Sea ice Sapienza Università di Roma: CINECA IRIS Antarctic Ross Sea Terra Nova Bay Tethys Bay ENVELOPE(164.067,164.067,-74.683,-74.683) Environmental Pollution 246 772 781 |
institution |
Open Polar |
collection |
Sapienza Università di Roma: CINECA IRIS |
op_collection_id |
ftunivromairis |
language |
English |
topic |
biomagnification metal polar stable isotope sympagic algae animal Antarctic region Bayes theorem bay biota environmental monitoring fishe invertebrate trace element water pollutant chemical zooplankton food chain |
spellingShingle |
biomagnification metal polar stable isotope sympagic algae animal Antarctic region Bayes theorem bay biota environmental monitoring fishe invertebrate trace element water pollutant chemical zooplankton food chain Signa G. Calizza E. Costantini M. L. Tramati C. Sporta Caputi S. Mazzola A. Rossi L. Vizzini S. Horizontal and vertical food web structure drives trace element trophic transfer in Terra Nova Bay, Antarctica |
topic_facet |
biomagnification metal polar stable isotope sympagic algae animal Antarctic region Bayes theorem bay biota environmental monitoring fishe invertebrate trace element water pollutant chemical zooplankton food chain |
description |
Despite a vast amount of literature has focused on trace element (TE) contamination in Antarctica during the last decades, the assessment of the main pathways driving TE transfer to the biota is still an overlooked issue. This limits the ability to predict how variations in sea-ice dynamics and productivity due to climate change will affect TE allocation in the food web. Here, food web structure of Tethys Bay (Terra Nova Bay, Ross Sea, Antarctica) was first characterised by analysing carbon and nitrogen stable isotopes (δ 13 C, δ 15 N) in organic matter sources (sediment and planktonic, benthic and sympagic primary producers) and consumers (zooplankton, benthic invertebrates, fish and birds). Diet and trophic position were also characterised using Bayesian mixing models. Then, relationships between stable isotopes, diet and TEs (Cd, Cr, Co, Cu, Hg, Ni, Pb and V) were assessed in order to evaluate if and how horizontal (organic matter pathways) and vertical (trophic position) food web features influence TE transfer to the biota. Regressions between log[TE] and δ 13 C revealed that the sympagic pathway drives accumulation of V in primary consumers and Cd and Hg in secondary consumers, and that a coupled benthic/pelagic pathway drives Pb transfer to all consumers. Regressions between log[TE] and δ 15 N showed that only Hg biomagnifies across trophic levels, while all the others TEs showed a biodilution pattern, consistent with patterns observed in temperate food webs. Although the Cd behavior needs further investigations, the present findings provide new insights about the role of basal sources in the transfer of TEs in polar systems. This is especially important nowadays in light of the forecasted trophic changes potentially resulting from climate change-induced modification of sea-ice dynamics. |
author2 |
Signa, G. Calizza, E. Costantini, M. L. Tramati, C. Sporta Caputi, S. Mazzola, A. Rossi, L. Vizzini, S. |
format |
Article in Journal/Newspaper |
author |
Signa G. Calizza E. Costantini M. L. Tramati C. Sporta Caputi S. Mazzola A. Rossi L. Vizzini S. |
author_facet |
Signa G. Calizza E. Costantini M. L. Tramati C. Sporta Caputi S. Mazzola A. Rossi L. Vizzini S. |
author_sort |
Signa G. |
title |
Horizontal and vertical food web structure drives trace element trophic transfer in Terra Nova Bay, Antarctica |
title_short |
Horizontal and vertical food web structure drives trace element trophic transfer in Terra Nova Bay, Antarctica |
title_full |
Horizontal and vertical food web structure drives trace element trophic transfer in Terra Nova Bay, Antarctica |
title_fullStr |
Horizontal and vertical food web structure drives trace element trophic transfer in Terra Nova Bay, Antarctica |
title_full_unstemmed |
Horizontal and vertical food web structure drives trace element trophic transfer in Terra Nova Bay, Antarctica |
title_sort |
horizontal and vertical food web structure drives trace element trophic transfer in terra nova bay, antarctica |
publisher |
Elsevier Ltd |
publishDate |
2019 |
url |
https://hdl.handle.net/11573/1290051 https://doi.org/10.1016/j.envpol.2018.12.071 |
long_lat |
ENVELOPE(164.067,164.067,-74.683,-74.683) |
geographic |
Antarctic Ross Sea Terra Nova Bay Tethys Bay |
geographic_facet |
Antarctic Ross Sea Terra Nova Bay Tethys Bay |
genre |
Antarc* Antarctic Antarctica Ross Sea Sea ice |
genre_facet |
Antarc* Antarctic Antarctica Ross Sea Sea ice |
op_relation |
info:eu-repo/semantics/altIdentifier/pmid/30623833 info:eu-repo/semantics/altIdentifier/wos/WOS:000458222100088 volume:246 firstpage:772 lastpage:781 numberofpages:10 journal:ENVIRONMENTAL POLLUTION https://hdl.handle.net/11573/1290051 doi:10.1016/j.envpol.2018.12.071 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85060034539 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1016/j.envpol.2018.12.071 |
container_title |
Environmental Pollution |
container_volume |
246 |
container_start_page |
772 |
op_container_end_page |
781 |
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1802637933429129216 |