Ocean warming and freshening effects on lipid metabolism in coastal Antarctic phytoplankton assemblages dominated by sub-Antarctic species
Marine phytoplankton can utilize different strategies to cope with ocean warming and freshening from glacialmelting in polar regions, which are disproportionally impacted by global warming. In the present study, we investigatedthe individual and combined effects of a 4 °C increase in seawater temper...
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ftconicet:oai:ri.conicet.gov.ar:11336/182363 2023-10-09T21:45:57+02:00 Ocean warming and freshening effects on lipid metabolism in coastal Antarctic phytoplankton assemblages dominated by sub-Antarctic species Antacli, Julieta Carolina Hernando, Marcelo Pablo De Troch, M. Malanga, Gabriela Fabiana Mendiolar, Manuela Hernández, D. R. Varela, D. E. Antoni, Julieta Silvina Sahade, Ricardo Jose Schloss, Irene Ruth application/pdf http://hdl.handle.net/11336/182363 eng eng Elsevier info:eu-repo/semantics/altIdentifier/url/https://linkinghub.elsevier.com/retrieve/pii/S0048969721029508 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.scitotenv.2021.147879 http://hdl.handle.net/11336/182363 Antacli, Julieta Carolina; Hernando, Marcelo Pablo; De Troch, M.; Malanga, Gabriela Fabiana; Mendiolar, Manuela; et al.; Ocean warming and freshening effects on lipid metabolism in coastal Antarctic phytoplankton assemblages dominated by sub-Antarctic species; Elsevier; Science of the Total Environment; 790; 10-10-2021; 1-16 0048-9697 1879-1026 CONICET Digital CONICET info:eu-repo/semantics/restrictedAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ Coastal Antarctica Fatty Acids Lipid Damage Phytoplankton Salinity decrease Temperature increase https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.1016/j.scitotenv.2021.147879 2023-09-24T19:16:20Z Marine phytoplankton can utilize different strategies to cope with ocean warming and freshening from glacialmelting in polar regions, which are disproportionally impacted by global warming. In the present study, we investigatedthe individual and combined effects of a 4 °C increase in seawater temperature (T+) and a 4 psu decreasein salinity (S−) from ambient values on biomass, nutrient use, fatty acid composition and lipid damagebiochemistry of natural phytoplankton assemblages from Potter Cove (25 de Mayo/King George Island,Antarctica). Experiments were conducted by exposing the assemblages to four treatments during a 7-day incubationperiod using microcosm located along shore from January 23 to 31, 2016. The N:P ratio decreased in alltreatments from day 4 onwards, but especially under high temperature (T+). Lipid damage was mainly detected under S0T+ and S−T+ conditions, and it decreased when the production of the antioxidant α-tocopherol increased.This antioxidant protection resulted in a build-up of phytoplankton biomass, especially at T+. Underthe combined effect of both stressors (S−T+), the concentration of ω3 fatty acids increased, potentially leadingto higher-quality FA composition. These results, which were related to the dominance of sub-Antarctic speciesin phytoplankton assemblages, contribute to the understanding of the potential consequences of oceanwarmingand increase seawater freshening on the trophic webs of the Southern Ocean. Fil: Antacli, Julieta Carolina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Diversidad y Ecología Animal. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Instituto de Diversidad y Ecología Animal; Argentina Fil: Hernando, Marcelo Pablo. Comisión Nacional de Energía Atómica. Gerencia de Área de Aplicaciones de la Tecnología Nuclear. Departamento de Radiobiología; Argentina Fil: De Troch, M. University of Ghent; Bélgica Fil: Malanga, Gabriela Fabiana. ... Article in Journal/Newspaper Antarc* Antarctic Antarctica King George Island Southern Ocean CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) 25 de Mayo ENVELOPE(-58.000,-58.000,-62.083,-62.083) Antarctic Argentina Julieta ENVELOPE(-61.358,-61.358,-64.397,-64.397) King George Island Pablo ENVELOPE(-63.717,-63.717,-64.283,-64.283) Potter Cove Southern Ocean Science of The Total Environment 790 147879 |
institution |
Open Polar |
collection |
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
op_collection_id |
ftconicet |
language |
English |
topic |
Coastal Antarctica Fatty Acids Lipid Damage Phytoplankton Salinity decrease Temperature increase https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
spellingShingle |
Coastal Antarctica Fatty Acids Lipid Damage Phytoplankton Salinity decrease Temperature increase https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 Antacli, Julieta Carolina Hernando, Marcelo Pablo De Troch, M. Malanga, Gabriela Fabiana Mendiolar, Manuela Hernández, D. R. Varela, D. E. Antoni, Julieta Silvina Sahade, Ricardo Jose Schloss, Irene Ruth Ocean warming and freshening effects on lipid metabolism in coastal Antarctic phytoplankton assemblages dominated by sub-Antarctic species |
topic_facet |
Coastal Antarctica Fatty Acids Lipid Damage Phytoplankton Salinity decrease Temperature increase https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
description |
Marine phytoplankton can utilize different strategies to cope with ocean warming and freshening from glacialmelting in polar regions, which are disproportionally impacted by global warming. In the present study, we investigatedthe individual and combined effects of a 4 °C increase in seawater temperature (T+) and a 4 psu decreasein salinity (S−) from ambient values on biomass, nutrient use, fatty acid composition and lipid damagebiochemistry of natural phytoplankton assemblages from Potter Cove (25 de Mayo/King George Island,Antarctica). Experiments were conducted by exposing the assemblages to four treatments during a 7-day incubationperiod using microcosm located along shore from January 23 to 31, 2016. The N:P ratio decreased in alltreatments from day 4 onwards, but especially under high temperature (T+). Lipid damage was mainly detected under S0T+ and S−T+ conditions, and it decreased when the production of the antioxidant α-tocopherol increased.This antioxidant protection resulted in a build-up of phytoplankton biomass, especially at T+. Underthe combined effect of both stressors (S−T+), the concentration of ω3 fatty acids increased, potentially leadingto higher-quality FA composition. These results, which were related to the dominance of sub-Antarctic speciesin phytoplankton assemblages, contribute to the understanding of the potential consequences of oceanwarmingand increase seawater freshening on the trophic webs of the Southern Ocean. Fil: Antacli, Julieta Carolina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Diversidad y Ecología Animal. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales. Instituto de Diversidad y Ecología Animal; Argentina Fil: Hernando, Marcelo Pablo. Comisión Nacional de Energía Atómica. Gerencia de Área de Aplicaciones de la Tecnología Nuclear. Departamento de Radiobiología; Argentina Fil: De Troch, M. University of Ghent; Bélgica Fil: Malanga, Gabriela Fabiana. ... |
format |
Article in Journal/Newspaper |
author |
Antacli, Julieta Carolina Hernando, Marcelo Pablo De Troch, M. Malanga, Gabriela Fabiana Mendiolar, Manuela Hernández, D. R. Varela, D. E. Antoni, Julieta Silvina Sahade, Ricardo Jose Schloss, Irene Ruth |
author_facet |
Antacli, Julieta Carolina Hernando, Marcelo Pablo De Troch, M. Malanga, Gabriela Fabiana Mendiolar, Manuela Hernández, D. R. Varela, D. E. Antoni, Julieta Silvina Sahade, Ricardo Jose Schloss, Irene Ruth |
author_sort |
Antacli, Julieta Carolina |
title |
Ocean warming and freshening effects on lipid metabolism in coastal Antarctic phytoplankton assemblages dominated by sub-Antarctic species |
title_short |
Ocean warming and freshening effects on lipid metabolism in coastal Antarctic phytoplankton assemblages dominated by sub-Antarctic species |
title_full |
Ocean warming and freshening effects on lipid metabolism in coastal Antarctic phytoplankton assemblages dominated by sub-Antarctic species |
title_fullStr |
Ocean warming and freshening effects on lipid metabolism in coastal Antarctic phytoplankton assemblages dominated by sub-Antarctic species |
title_full_unstemmed |
Ocean warming and freshening effects on lipid metabolism in coastal Antarctic phytoplankton assemblages dominated by sub-Antarctic species |
title_sort |
ocean warming and freshening effects on lipid metabolism in coastal antarctic phytoplankton assemblages dominated by sub-antarctic species |
publisher |
Elsevier |
url |
http://hdl.handle.net/11336/182363 |
long_lat |
ENVELOPE(-58.000,-58.000,-62.083,-62.083) ENVELOPE(-61.358,-61.358,-64.397,-64.397) ENVELOPE(-63.717,-63.717,-64.283,-64.283) |
geographic |
25 de Mayo Antarctic Argentina Julieta King George Island Pablo Potter Cove Southern Ocean |
geographic_facet |
25 de Mayo Antarctic Argentina Julieta King George Island Pablo Potter Cove Southern Ocean |
genre |
Antarc* Antarctic Antarctica King George Island Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica King George Island Southern Ocean |
op_relation |
info:eu-repo/semantics/altIdentifier/url/https://linkinghub.elsevier.com/retrieve/pii/S0048969721029508 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.scitotenv.2021.147879 http://hdl.handle.net/11336/182363 Antacli, Julieta Carolina; Hernando, Marcelo Pablo; De Troch, M.; Malanga, Gabriela Fabiana; Mendiolar, Manuela; et al.; Ocean warming and freshening effects on lipid metabolism in coastal Antarctic phytoplankton assemblages dominated by sub-Antarctic species; Elsevier; Science of the Total Environment; 790; 10-10-2021; 1-16 0048-9697 1879-1026 CONICET Digital CONICET |
op_rights |
info:eu-repo/semantics/restrictedAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
op_doi |
https://doi.org/10.1016/j.scitotenv.2021.147879 |
container_title |
Science of The Total Environment |
container_volume |
790 |
container_start_page |
147879 |
_version_ |
1779321615419441152 |