Fatty acid profile of zooplankton species on the Antarctic Southern Ocean
Dissertação de Mestrado em Química apresentada à Faculdade de Ciências e Tecnologia The Antarctica and Southern Ocean ecosystems have been suffering changes through the last 30 years, in particular raising of the ocean temperature. These changes occur in a non-circumpolar distribution, for which the...
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ftunivcoimbra:oai:estudogeral.sib.uc.pt:10316/93964 2023-05-15T13:45:49+02:00 Fatty acid profile of zooplankton species on the Antarctic Southern Ocean Perfis de ácidos gordos de várias espécies de zooplankton do Oceano Antártico Pescadinha, Patrícia Pereira Gonçalves, Ana Marta dos Santos Mendes Silvestre, Maria João Pedrosa Ferreira Moreno 2020-12-10 http://hdl.handle.net/10316/93964 eng eng http://hdl.handle.net/10316/93964 202687880 info:eu-repo/semantics/embargoedAccess Antártida Oceano Antártico Zooplankton Ácidos gordos Alterações climáticas Antarctica Southern Ocean Fatty acids Climate Change info:eu-repo/semantics/masterThesis 2020 ftunivcoimbra 2022-08-11T14:05:38Z Dissertação de Mestrado em Química apresentada à Faculdade de Ciências e Tecnologia The Antarctica and Southern Ocean ecosystems have been suffering changes through the last 30 years, in particular raising of the ocean temperature. These changes occur in a non-circumpolar distribution, for which there are more affected zones than others and, consequently more species in particular regions. It is necessary to understand how these species deal with the environmental changes that are influencing its habitat and how these changes will alter the global marine ecosystems. As Antarctica is the habitat of numerous endemic species, such studies are urgently needed. Due to climate impacts, it is possible to observe evidence of change in the Antarctic food web, where Antarctic krill (Euphausia superba) has decreased its important role in some regions, allowing other zooplankton species to have that role. It is of extreme importance to study the lower trophic levels of this food web, so it is possible to verify the effects of climate change in the species that live in these waters that may help higher trophic levels. Fatty acid analysis allows to assess the response of species to environmental stressors and identify potential food sources, in a trophic ecology context. The zooplankton species of Euphausia superba, Euphausia triacantha, Themisto gaudichaudii, Thysanoessa spp were collected between December 2016 and January 2017, in three locations with distinct characteristics: Antarctic waters, Intermediate and Sub-Antarctic waters. After GC-MS analysis, it was possible to verify that the species E. triacantha, T. gaudichaudii and Thysanoessa spp. presented a better body condition than E. superba. Besides, it was also possible to observe that these three species all revealed better conditions in waters with a higher temperature (Sub-Antarctic waters) than in waters with lower temperatures, closer to the ones found in the Southern Ocean. However, E. superba exhibited a different fatty acid profile (characterized by the ... Master Thesis Antarc* Antarctic Antarctic Krill Antarctica Antártida Euphausia superba Southern Ocean Universidade de Coimbra: Estudo Geral Antarctic Southern Ocean The Antarctic |
institution |
Open Polar |
collection |
Universidade de Coimbra: Estudo Geral |
op_collection_id |
ftunivcoimbra |
language |
English |
topic |
Antártida Oceano Antártico Zooplankton Ácidos gordos Alterações climáticas Antarctica Southern Ocean Fatty acids Climate Change |
spellingShingle |
Antártida Oceano Antártico Zooplankton Ácidos gordos Alterações climáticas Antarctica Southern Ocean Fatty acids Climate Change Pescadinha, Patrícia Pereira Fatty acid profile of zooplankton species on the Antarctic Southern Ocean |
topic_facet |
Antártida Oceano Antártico Zooplankton Ácidos gordos Alterações climáticas Antarctica Southern Ocean Fatty acids Climate Change |
description |
Dissertação de Mestrado em Química apresentada à Faculdade de Ciências e Tecnologia The Antarctica and Southern Ocean ecosystems have been suffering changes through the last 30 years, in particular raising of the ocean temperature. These changes occur in a non-circumpolar distribution, for which there are more affected zones than others and, consequently more species in particular regions. It is necessary to understand how these species deal with the environmental changes that are influencing its habitat and how these changes will alter the global marine ecosystems. As Antarctica is the habitat of numerous endemic species, such studies are urgently needed. Due to climate impacts, it is possible to observe evidence of change in the Antarctic food web, where Antarctic krill (Euphausia superba) has decreased its important role in some regions, allowing other zooplankton species to have that role. It is of extreme importance to study the lower trophic levels of this food web, so it is possible to verify the effects of climate change in the species that live in these waters that may help higher trophic levels. Fatty acid analysis allows to assess the response of species to environmental stressors and identify potential food sources, in a trophic ecology context. The zooplankton species of Euphausia superba, Euphausia triacantha, Themisto gaudichaudii, Thysanoessa spp were collected between December 2016 and January 2017, in three locations with distinct characteristics: Antarctic waters, Intermediate and Sub-Antarctic waters. After GC-MS analysis, it was possible to verify that the species E. triacantha, T. gaudichaudii and Thysanoessa spp. presented a better body condition than E. superba. Besides, it was also possible to observe that these three species all revealed better conditions in waters with a higher temperature (Sub-Antarctic waters) than in waters with lower temperatures, closer to the ones found in the Southern Ocean. However, E. superba exhibited a different fatty acid profile (characterized by the ... |
author2 |
Gonçalves, Ana Marta dos Santos Mendes Silvestre, Maria João Pedrosa Ferreira Moreno |
format |
Master Thesis |
author |
Pescadinha, Patrícia Pereira |
author_facet |
Pescadinha, Patrícia Pereira |
author_sort |
Pescadinha, Patrícia Pereira |
title |
Fatty acid profile of zooplankton species on the Antarctic Southern Ocean |
title_short |
Fatty acid profile of zooplankton species on the Antarctic Southern Ocean |
title_full |
Fatty acid profile of zooplankton species on the Antarctic Southern Ocean |
title_fullStr |
Fatty acid profile of zooplankton species on the Antarctic Southern Ocean |
title_full_unstemmed |
Fatty acid profile of zooplankton species on the Antarctic Southern Ocean |
title_sort |
fatty acid profile of zooplankton species on the antarctic southern ocean |
publishDate |
2020 |
url |
http://hdl.handle.net/10316/93964 |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Antarctic Krill Antarctica Antártida Euphausia superba Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Krill Antarctica Antártida Euphausia superba Southern Ocean |
op_relation |
http://hdl.handle.net/10316/93964 202687880 |
op_rights |
info:eu-repo/semantics/embargoedAccess |
_version_ |
1766231276267765760 |