Composition and abundance of microplastics in the marine and coastal areas in the Azores (North-Eastern Atlantic)
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Data de Publicação: | 2023 |
Tipo de documento: | Dissertação |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10451/59892 |
Resumo: | Tese de mestrado, Ecologia e Gestão Ambiental, 2023, Universidade de Lisboa, Faculdade de Ciências |
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Composition and abundance of microplastics in the marine and coastal areas in the Azores (North-Eastern Atlantic)Plásticolixo marinhosedimentozona costeirailhas oceânicasTeses de mestrado - 2023Departamento de Biologia AnimalTese de mestrado, Ecologia e Gestão Ambiental, 2023, Universidade de Lisboa, Faculdade de CiênciasEvery year, millions of tons of solid waste are thrown into the sea with negative implications for the environment and, consequently, for the ecosystems and species that inhabit it. Commercial maritime traffic and ocean gyres lead to a significant increase in the amount of pollution in the waters and coasts of remote oceanic islands. Most of this type of pollution is plastics items, and those that are smaller than 5 mm are considered microplastics. These particles are ubiquitous throughout the marine environment, dispersed among beaches, estuaries, on the water surface and even on the seafloor, affecting ecosystems and impairing species. The objective of this study was to estimate the abundance and dimension of microplastics along the coast of São Miguel Island, Azores, following an inshoreoffshore gradient along a stream until the ocean. Sediment samples were collected and analysed for across 8 areas covering the entire coastline of the island, each one divided among 4 connected sites, along an inland-coastal gradient, from the stream until the ocean (upstream, downstream, coastal, and submerged marine sediments), following a nested design approach. Also, apart from this first approach, 15 beaches, covering all island, were also tested and compared. In both sampling approaches (areas and beaches), the highest abundance of microplastics was 0.74 MP/g (Ribeira Quente), and the lowest 0.20 MP/g (Ribeira Praia), both in South beaches. The largest category of microplastics was fibres, followed by microbeads and fragments, and the most abundant colours were transparent, black, and blue. There was significant variability in the abundance among areas, sites and beaches, and only among sites and beaches in the dimension. Factors like granulometry, sites and pollution sources are detected as significant in microplastics abundance. This study results are important to the scientific community and particularly for local government concerning litter management and mitigation.Costa, José Lino Vieira de Oliveira, 1964-Torres, PauloRepositório da Universidade de LisboaAmorim, Luísa Madalena Mendes2023-10-18T17:51:30Z202320232023-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://hdl.handle.net/10451/59892enginfo: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:RCAAP2023-11-08T17:09:28Zoai:repositorio.ul.pt:10451/59892Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T22:09:46.866611Repositório 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 |
Composition and abundance of microplastics in the marine and coastal areas in the Azores (North-Eastern Atlantic) |
title |
Composition and abundance of microplastics in the marine and coastal areas in the Azores (North-Eastern Atlantic) |
spellingShingle |
Composition and abundance of microplastics in the marine and coastal areas in the Azores (North-Eastern Atlantic) Amorim, Luísa Madalena Mendes Plástico lixo marinho sedimento zona costeira ilhas oceânicas Teses de mestrado - 2023 Departamento de Biologia Animal |
title_short |
Composition and abundance of microplastics in the marine and coastal areas in the Azores (North-Eastern Atlantic) |
title_full |
Composition and abundance of microplastics in the marine and coastal areas in the Azores (North-Eastern Atlantic) |
title_fullStr |
Composition and abundance of microplastics in the marine and coastal areas in the Azores (North-Eastern Atlantic) |
title_full_unstemmed |
Composition and abundance of microplastics in the marine and coastal areas in the Azores (North-Eastern Atlantic) |
title_sort |
Composition and abundance of microplastics in the marine and coastal areas in the Azores (North-Eastern Atlantic) |
author |
Amorim, Luísa Madalena Mendes |
author_facet |
Amorim, Luísa Madalena Mendes |
author_role |
author |
dc.contributor.none.fl_str_mv |
Costa, José Lino Vieira de Oliveira, 1964- Torres, Paulo Repositório da Universidade de Lisboa |
dc.contributor.author.fl_str_mv |
Amorim, Luísa Madalena Mendes |
dc.subject.por.fl_str_mv |
Plástico lixo marinho sedimento zona costeira ilhas oceânicas Teses de mestrado - 2023 Departamento de Biologia Animal |
topic |
Plástico lixo marinho sedimento zona costeira ilhas oceânicas Teses de mestrado - 2023 Departamento de Biologia Animal |
description |
Tese de mestrado, Ecologia e Gestão Ambiental, 2023, Universidade de Lisboa, Faculdade de Ciências |
publishDate |
2023 |
dc.date.none.fl_str_mv |
2023-10-18T17:51:30Z 2023 2023 2023-01-01T00:00:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10451/59892 |
url |
http://hdl.handle.net/10451/59892 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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