How different scenarios of rising seawater temperature will alter the response of Mytilus galloprovincialis to lithium?

Detalhes bibliográficos
Autor(a) principal: Santos, Daniel Seabra dos
Data de Publicação: 2022
Tipo de documento: Dissertação
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10773/36603
Resumo: Marine ecosystems have been affected by the gradual rise in temperature due to climate change. Warming scenarios and the intensification of extreme climate events, such as marine heatwaves (MHWs), have been negatively affecting marine organisms. In addition, they are also threatened by anthropogenic pollution. Lithium (Li) is an emerging pollutant that has become a major concern due to its increasing use in a variety of applications. Understanding its combination with warming scenarios is crucial, as very little is known about its impact on marine organisms. For this reason, this research aimed to assess how different temperature increase scenarios may affect the response of Mytilus galloprovincialis to the effects of Li. Mussel bioaccumulation levels and physiological and biochemical biomarkers were analyzed after 28 days of exposure to 250 μg/L of Li under different temperature scenarios (control – 17 ºC; warming – 21 ºC and a simulation of a marine heatwave - 23 ºC). The results indicate that Li concentration in the tissues increased only in the contaminated mussels when exposed to 17 and 21 ºC, and that temperature had no effect on the accumulation of Li. The respiration rate of mussels was higher in the contaminated mussels than in the non-contaminated ones. The metabolic rate decreased in mussels exposed to 21 ºC and MHW, while mussels exposed to the combination of Li and MHW increased their metabolic rate. The mussels exposed to MHW and Li exhibited cellular damage. It was found that Li was not neurotoxic to M. galloprovincialis. This study has shown that only the most stressful condition (MHW + Li) induced negative effects in this species which can negatively affect the growth and reproduction of an entire community as well as the structure and functioning of the ecosystem. In general, the presented results highlight the importance of future studies in which it is necessary to combine the effects of pollutants and climate change, namely extreme weather events such as MHWs.
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spelling How different scenarios of rising seawater temperature will alter the response of Mytilus galloprovincialis to lithium?WarmingMarine heatwavesBiochemical alterationsMytilus galloprovincialisLithiumMarine ecosystems have been affected by the gradual rise in temperature due to climate change. Warming scenarios and the intensification of extreme climate events, such as marine heatwaves (MHWs), have been negatively affecting marine organisms. In addition, they are also threatened by anthropogenic pollution. Lithium (Li) is an emerging pollutant that has become a major concern due to its increasing use in a variety of applications. Understanding its combination with warming scenarios is crucial, as very little is known about its impact on marine organisms. For this reason, this research aimed to assess how different temperature increase scenarios may affect the response of Mytilus galloprovincialis to the effects of Li. Mussel bioaccumulation levels and physiological and biochemical biomarkers were analyzed after 28 days of exposure to 250 μg/L of Li under different temperature scenarios (control – 17 ºC; warming – 21 ºC and a simulation of a marine heatwave - 23 ºC). The results indicate that Li concentration in the tissues increased only in the contaminated mussels when exposed to 17 and 21 ºC, and that temperature had no effect on the accumulation of Li. The respiration rate of mussels was higher in the contaminated mussels than in the non-contaminated ones. The metabolic rate decreased in mussels exposed to 21 ºC and MHW, while mussels exposed to the combination of Li and MHW increased their metabolic rate. The mussels exposed to MHW and Li exhibited cellular damage. It was found that Li was not neurotoxic to M. galloprovincialis. This study has shown that only the most stressful condition (MHW + Li) induced negative effects in this species which can negatively affect the growth and reproduction of an entire community as well as the structure and functioning of the ecosystem. In general, the presented results highlight the importance of future studies in which it is necessary to combine the effects of pollutants and climate change, namely extreme weather events such as MHWs.Os ecossistemas marinhos têm vindo a ser afetados com o aumento gradual da temperatura devido às alterações climáticas. Cenários de aquecimento e a intensificação de eventos climáticos extremos têm afetado os organismos marinhos, como as ondas de calor marinhas (MHWs), que são períodos de aumento anómalo da temperatura da superfície da água. Para além disso, estes também têm sido ameaçados pela poluição derivado da atividade antropogénica. O lítio (Li) é um poluente emergente que se tornou uma preocupação devido ao seu uso crescente numa variedade de aplicações. Compreender a sua influência nos ambientes marinhos em combinação com os cenários de aquecimento é crucial, pois muito pouco se sabe sobre o seu impacto nos organismos marinhos, especialmente quando se considera também os impactos cada vez mais preocupantes das mudanças climáticas. Posto isto, esta investigação visa avaliar como diferentes cenários de aumento de temperatura podem afetar a resposta de Mytilus galloprovincialis aos efeitos de Li. Foram avaliados níveis de bioacumulação nos mexilhões e biomarcadores fisiológicos e bioquímicos após 28 dias de exposição a 250 μg/L de Li em diferentes cenários de temperatura (controlo – 17 ºC; aquecimento - 21 ºC e uma simulação de uma onda de calor marinha – 23 ºC). Os resultados indicam que a concentração de Li nos tecidos aumentou apenas nos mexilhões contaminados quando expostos a 17 e 21 ºC, e que a temperatura não teve qualquer efeito na acumulação de Li. A taxa de respiração dos mexilhões foi maior nos mexilhões contaminados do que nos não contaminados. A taxa metabólica diminuiu em mexilhões expostos a 21 ºC e MHW, enquanto os mexilhões expostos à combinação de Li e MHW aumentaram a sua taxa metabólica. Os mexilhões expostos à MHW e principalmente com Li exibiram danos celulares. Observou-se que o Li não causou neurotoxicidade em M. galloprovincialis. Este estudo mostrou que apenas a condição de maior stresse (MHW + Li) induziu efeitos negativos nesta espécie, o que pode afetar negativamente o crescimento e reprodução de toda uma população, bem como a estrutura e funcionamento do ecossistema. No geral, os resultados atuais destacam a importância de estudos futuros em que é necessário combinar diferentes poluentes com cenários de aumento de temperatura, nomeadamente eventos climáticos extremos como MHW.2023-03-20T12:06:36Z2022-12-21T00:00:00Z2022-12-21info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://hdl.handle.net/10773/36603engSantos, Daniel Seabra dosinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-05-06T04:43:37Zoai:ria.ua.pt:10773/36603Portal AgregadorONGhttps://www.rcaap.pt/oai/openairemluisa.alvim@gmail.comopendoar:71602024-05-06T04:43:37Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv How different scenarios of rising seawater temperature will alter the response of Mytilus galloprovincialis to lithium?
title How different scenarios of rising seawater temperature will alter the response of Mytilus galloprovincialis to lithium?
spellingShingle How different scenarios of rising seawater temperature will alter the response of Mytilus galloprovincialis to lithium?
Santos, Daniel Seabra dos
Warming
Marine heatwaves
Biochemical alterations
Mytilus galloprovincialis
Lithium
title_short How different scenarios of rising seawater temperature will alter the response of Mytilus galloprovincialis to lithium?
title_full How different scenarios of rising seawater temperature will alter the response of Mytilus galloprovincialis to lithium?
title_fullStr How different scenarios of rising seawater temperature will alter the response of Mytilus galloprovincialis to lithium?
title_full_unstemmed How different scenarios of rising seawater temperature will alter the response of Mytilus galloprovincialis to lithium?
title_sort How different scenarios of rising seawater temperature will alter the response of Mytilus galloprovincialis to lithium?
author Santos, Daniel Seabra dos
author_facet Santos, Daniel Seabra dos
author_role author
dc.contributor.author.fl_str_mv Santos, Daniel Seabra dos
dc.subject.por.fl_str_mv Warming
Marine heatwaves
Biochemical alterations
Mytilus galloprovincialis
Lithium
topic Warming
Marine heatwaves
Biochemical alterations
Mytilus galloprovincialis
Lithium
description Marine ecosystems have been affected by the gradual rise in temperature due to climate change. Warming scenarios and the intensification of extreme climate events, such as marine heatwaves (MHWs), have been negatively affecting marine organisms. In addition, they are also threatened by anthropogenic pollution. Lithium (Li) is an emerging pollutant that has become a major concern due to its increasing use in a variety of applications. Understanding its combination with warming scenarios is crucial, as very little is known about its impact on marine organisms. For this reason, this research aimed to assess how different temperature increase scenarios may affect the response of Mytilus galloprovincialis to the effects of Li. Mussel bioaccumulation levels and physiological and biochemical biomarkers were analyzed after 28 days of exposure to 250 μg/L of Li under different temperature scenarios (control – 17 ºC; warming – 21 ºC and a simulation of a marine heatwave - 23 ºC). The results indicate that Li concentration in the tissues increased only in the contaminated mussels when exposed to 17 and 21 ºC, and that temperature had no effect on the accumulation of Li. The respiration rate of mussels was higher in the contaminated mussels than in the non-contaminated ones. The metabolic rate decreased in mussels exposed to 21 ºC and MHW, while mussels exposed to the combination of Li and MHW increased their metabolic rate. The mussels exposed to MHW and Li exhibited cellular damage. It was found that Li was not neurotoxic to M. galloprovincialis. This study has shown that only the most stressful condition (MHW + Li) induced negative effects in this species which can negatively affect the growth and reproduction of an entire community as well as the structure and functioning of the ecosystem. In general, the presented results highlight the importance of future studies in which it is necessary to combine the effects of pollutants and climate change, namely extreme weather events such as MHWs.
publishDate 2022
dc.date.none.fl_str_mv 2022-12-21T00:00:00Z
2022-12-21
2023-03-20T12:06:36Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
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url http://hdl.handle.net/10773/36603
dc.language.iso.fl_str_mv eng
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instacron:RCAAP
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