Composition and abundance of microplastics in the marine and coastal areas in the Azores (North-Eastern Atlantic)

Detalhes bibliográficos
Autor(a) principal: Amorim, Luísa Madalena Mendes
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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spelling 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
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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