Genetic structure of mussel population in NE Atlantic and Mediterranean: connectivity between deep-sea habitats

Detalhes bibliográficos
Autor(a) principal: Monteiro, Ana Rita Andril
Data de Publicação: 2016
Tipo de documento: Dissertação
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10773/17460
Resumo: Species persist over time, due to exchange of individuals between subpopulations. In the marine environment, most benthic organisms have complex life cycles including pelagic larvae that are transported by ocean currents promoting species dispersal. Larval dispersal connects geographically distant populations and determines population structure. The knowledge about this biologic process provides relevant information for conservation of marine populations. This study investigates the genetic structure and connectivity of deep-sea mussel populations between fragmented habitats in the NE Atlantic and Mediterranean. The mitochondrial Cytochrome Oxidase I (mtCOI) gene was used to analyze site-specific genetic diversity and the population structure of two mussel species, Idas modiolaeformis and “Idas” simpsoni. Populations of each species are not geographically isolated. The presence of one dominant haplotype for each species suggests shared ancestral polymorphisms between Mediterranean and NE Atlantic populations. The overall high genetic differentiation observed in I. modiolaeformis indicates that the metapopulation is structured. Distant populations, located in Atlantic and E Mediterranean, revealed low genetic distances, suggesting gene flow between the two regions. Genetic and geographical distances support an island model of I. modiolaeformis population structure. A major drawback of this study is concerned with the discrepant number of individuals among populations. Further research will be needed, using more specimens and other gene markers, to investigate connectivity patterns at different spatial scales.
id RCAP_e1b32e3c26b9b2acba8e17070bc12bb5
oai_identifier_str oai:ria.ua.pt:10773/17460
network_acronym_str RCAP
network_name_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository_id_str 7160
spelling Genetic structure of mussel population in NE Atlantic and Mediterranean: connectivity between deep-sea habitatsLarvas - HabitatMexilhões - Mediterrâneo - Atlântico NorteSpecies persist over time, due to exchange of individuals between subpopulations. In the marine environment, most benthic organisms have complex life cycles including pelagic larvae that are transported by ocean currents promoting species dispersal. Larval dispersal connects geographically distant populations and determines population structure. The knowledge about this biologic process provides relevant information for conservation of marine populations. This study investigates the genetic structure and connectivity of deep-sea mussel populations between fragmented habitats in the NE Atlantic and Mediterranean. The mitochondrial Cytochrome Oxidase I (mtCOI) gene was used to analyze site-specific genetic diversity and the population structure of two mussel species, Idas modiolaeformis and “Idas” simpsoni. Populations of each species are not geographically isolated. The presence of one dominant haplotype for each species suggests shared ancestral polymorphisms between Mediterranean and NE Atlantic populations. The overall high genetic differentiation observed in I. modiolaeformis indicates that the metapopulation is structured. Distant populations, located in Atlantic and E Mediterranean, revealed low genetic distances, suggesting gene flow between the two regions. Genetic and geographical distances support an island model of I. modiolaeformis population structure. A major drawback of this study is concerned with the discrepant number of individuals among populations. Further research will be needed, using more specimens and other gene markers, to investigate connectivity patterns at different spatial scales.As espécies persistem ao longo do tempo devido à troca de indivíduos entre subpopulações. No ambiente marinho, a maioria dos organismos bentónicos têm ciclos de vida complexos, envolvendo larvas pelágicas que são transportadas por correntes oceânicas contribuindo para dispersão das espécies. A dispersão larvar estabelece conectividade entre populações geograficamente separadas e afeta a estrutura da população. O conhecimento deste processo biológico promove informações importantes para a conservação de populações marinhas. Este estudo investiga a estrutura genética e conectividade de populações de mexilhão de profundidade entre habitats fragmentados no NE Atlântico e Mediterrânico. O gene mitocondrial, Citocromo Oxidase I (mtCOI), foi utilizado para analisar diversidade genética por local e a estrutura populacional de duas espécies de mexilhão, Idas modiolaeformis e "Idas" simpsoni. As populações de cada uma das espécies não se encontram geograficamente isoladas. A presença de um haplótipo dominante para cada espécie sugere a partilha de polimorfismos ancestrais entre populações do Mediterrâneo e do NE Atlântico. As populações de I. modiolaeformis demonstraram uma elevada diferenciação genética, indicando estruturação da metapopulação. Populações distantes umas das outras, localizadas no Atlântico e E Mediterrâneo, revelaram baixas distâncias genéticas, sugerindo fluxo genético entre as duas regiões. Distâncias genéticas e geográficas suportam o modelo de ilha como o modelo para a estrutura populacional de I. modiolaeformis. Uma grande desvantagem deste estudo está relacionada com o número discrepante de indivíduos entre populações. Para investigar os padrões de conectividade em diferentes escalas espaciais serão necessários mais estudos, utilizando mais espécimes e outros marcadores genéticos.Universidade de Aveiro2016-01-052016-01-05T00:00:00Z2019-01-05T10:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://hdl.handle.net/10773/17460TID:202233510engMonteiro, Ana Rita Andrilinfo: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:RCAAP2024-02-22T11:33:17Zoai:ria.ua.pt:10773/17460Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T02:52:32.926768Repositório 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 Genetic structure of mussel population in NE Atlantic and Mediterranean: connectivity between deep-sea habitats
title Genetic structure of mussel population in NE Atlantic and Mediterranean: connectivity between deep-sea habitats
spellingShingle Genetic structure of mussel population in NE Atlantic and Mediterranean: connectivity between deep-sea habitats
Monteiro, Ana Rita Andril
Larvas - Habitat
Mexilhões - Mediterrâneo - Atlântico Norte
title_short Genetic structure of mussel population in NE Atlantic and Mediterranean: connectivity between deep-sea habitats
title_full Genetic structure of mussel population in NE Atlantic and Mediterranean: connectivity between deep-sea habitats
title_fullStr Genetic structure of mussel population in NE Atlantic and Mediterranean: connectivity between deep-sea habitats
title_full_unstemmed Genetic structure of mussel population in NE Atlantic and Mediterranean: connectivity between deep-sea habitats
title_sort Genetic structure of mussel population in NE Atlantic and Mediterranean: connectivity between deep-sea habitats
author Monteiro, Ana Rita Andril
author_facet Monteiro, Ana Rita Andril
author_role author
dc.contributor.author.fl_str_mv Monteiro, Ana Rita Andril
dc.subject.por.fl_str_mv Larvas - Habitat
Mexilhões - Mediterrâneo - Atlântico Norte
topic Larvas - Habitat
Mexilhões - Mediterrâneo - Atlântico Norte
description Species persist over time, due to exchange of individuals between subpopulations. In the marine environment, most benthic organisms have complex life cycles including pelagic larvae that are transported by ocean currents promoting species dispersal. Larval dispersal connects geographically distant populations and determines population structure. The knowledge about this biologic process provides relevant information for conservation of marine populations. This study investigates the genetic structure and connectivity of deep-sea mussel populations between fragmented habitats in the NE Atlantic and Mediterranean. The mitochondrial Cytochrome Oxidase I (mtCOI) gene was used to analyze site-specific genetic diversity and the population structure of two mussel species, Idas modiolaeformis and “Idas” simpsoni. Populations of each species are not geographically isolated. The presence of one dominant haplotype for each species suggests shared ancestral polymorphisms between Mediterranean and NE Atlantic populations. The overall high genetic differentiation observed in I. modiolaeformis indicates that the metapopulation is structured. Distant populations, located in Atlantic and E Mediterranean, revealed low genetic distances, suggesting gene flow between the two regions. Genetic and geographical distances support an island model of I. modiolaeformis population structure. A major drawback of this study is concerned with the discrepant number of individuals among populations. Further research will be needed, using more specimens and other gene markers, to investigate connectivity patterns at different spatial scales.
publishDate 2016
dc.date.none.fl_str_mv 2016-01-05
2016-01-05T00:00:00Z
2019-01-05T10:00:00Z
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/10773/17460
TID:202233510
url http://hdl.handle.net/10773/17460
identifier_str_mv TID:202233510
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.publisher.none.fl_str_mv Universidade de Aveiro
publisher.none.fl_str_mv Universidade de Aveiro
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
repository.mail.fl_str_mv
_version_ 1799137575326187520

Registros relacionados