Pico- and nanoplankton abundance and biomass in the Southwest Atlantic Ocean off Brazil

Detalhes bibliográficos
Ano de defesa: 2016
Autor(a) principal: Catherine Gerikas Ribeiro
Orientador(a): Frederico Pereira Brandini
Banca de defesa: Vivian Helena Pellizari, Janaina Rigonato, Fabiano Lopes Thompson, Daniel Vaulot
Tipo de documento: Tese
Tipo de acesso: Acesso aberto
Idioma: eng
Instituição de defesa: Universidade de São Paulo
Programa de Pós-Graduação: Oceanografia
Departamento: Não Informado pela instituição
País: BR
Link de acesso: https://doi.org/10.11606/T.21.2016.tde-05092016-153520
Resumo: Flow cytometry (FCM) is a well established technique used for enumeration and characterization of marine biological particles, which fulfills the scientific demands of rapid cell counting automation. FCM allows the discrimination of pico- and nanoplankton populations regarding its abundance, cell size, and pigment content both by natural or induced fluorescence. The cyanobacterium Prochlorococcus is widespread in the euphotic zone of the tropical and subtropical oceans, and is considered the smallest and most abundant photosynthetic organism in the planet. Synechococcus, other important cyanobacterium genus present in the picoplankton, is highly diverse and is widely distributed in marine ecosystems from cold and mesotrophic, to warm, open ocean oligotrophic waters. Photosynthetic pico- and nanoeukaryotes display a range of physiologies and life strategies. Although its abundance is generally lower, the larger cell size leads to a significant contribution to the epipelagic community biomass. In this thesis I aimed to investigate the abundance and carbon biomass distribution of heterotrophic bacteria, Prochlorococcus, Synechococcus, autotrophic pico- and nanoeukaryotes in the Southwest Atlantic Ocean off Brazil, their relation to the different water masses and the influence of hydrodynamic (South Atlantic Central Water intrusion) and biological processes (Trichodesmium spp. and Mesodinium rubrum blooms) on such distributions.
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spelling info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/doctoralThesis Pico- and nanoplankton abundance and biomass in the Southwest Atlantic Ocean off Brazil Abundância e biomassa pico- e nanoplanctônica no sudoeste do Oceano Atlântico ao largo da costa do Brasil 2016-03-23Frederico Pereira BrandiniVivian Helena PellizariJanaina RigonatoFabiano Lopes ThompsonDaniel VaulotCatherine Gerikas RibeiroUniversidade de São PauloOceanografiaUSPBR Bactérias heterotróficas Citometria de fluxo Flow cytometry Heterotrophic bacteria Nanoeucariotos Nanoeukaryotes Picoeucariotos Picoeukaryotes Prochlorococcus Prochlorococcus Southwest Atlantic Ocean Sudoeste do Oceano Atlântico Synechococcus Synechococcus Flow cytometry (FCM) is a well established technique used for enumeration and characterization of marine biological particles, which fulfills the scientific demands of rapid cell counting automation. FCM allows the discrimination of pico- and nanoplankton populations regarding its abundance, cell size, and pigment content both by natural or induced fluorescence. The cyanobacterium Prochlorococcus is widespread in the euphotic zone of the tropical and subtropical oceans, and is considered the smallest and most abundant photosynthetic organism in the planet. Synechococcus, other important cyanobacterium genus present in the picoplankton, is highly diverse and is widely distributed in marine ecosystems from cold and mesotrophic, to warm, open ocean oligotrophic waters. Photosynthetic pico- and nanoeukaryotes display a range of physiologies and life strategies. Although its abundance is generally lower, the larger cell size leads to a significant contribution to the epipelagic community biomass. In this thesis I aimed to investigate the abundance and carbon biomass distribution of heterotrophic bacteria, Prochlorococcus, Synechococcus, autotrophic pico- and nanoeukaryotes in the Southwest Atlantic Ocean off Brazil, their relation to the different water masses and the influence of hydrodynamic (South Atlantic Central Water intrusion) and biological processes (Trichodesmium spp. and Mesodinium rubrum blooms) on such distributions. A citometria de fluxo (FCM, sigla em inglês) é uma técnica bem estabelecida, usada para enumeração e caracterização de partículas biológicas marinhas, a qual supre a demanda científica por automação rápida de contagem de células. A FCM permite a discriminação de populações pico- e nanoplanctônicas no que concerne à sua abundância, tamanho de célula e pigmentação, tanto por fluorescência natural ou induzida. A cianobactéria Prochlorococcus é amplamente disseminada pela zona eufótica dos oceanos tropicais e subtropicais, sendo considerada o menor e mais abundante organismo fotossintético do planeta. Synechococcus, outro importante gênero de cianobactérias presente no picoplâncton, é diverso e amplamente distribuído em ecossistemas marinhos, de águas frias e mesotróficas à regiões oceânicas quentes e de águas oligotróficas. Pico- e nanoeucariotos fotossintéticos apresentam uma grande variedade de fisiologias e estratégias de vida. Embora a abundância destes grupos seja geralmente menor, o maior tamanho de suas células resulta numa contribuição significante dos mesmos para a biomassa da comunidade epipelágica. Na presente tese eu objetivei investigar a abundância e a distribuição da biomassa de carbono de bactérias heterotróficas, Prochlorococcus, Synechococcus, pico- e nanoeucariotos autotróficos no sudoeste do Oceano Atlântico ao largo do Brasil, sua relação com as diferentes massas d\'água e a influência de processos hidrodinâmicos (como a intrusão da Água Central do Atlântico Sul) e biológicos (florações de Trichodesmium spp. e Mesodinium rubrum) em tais distribuições. https://doi.org/10.11606/T.21.2016.tde-05092016-153520info:eu-repo/semantics/openAccessengreponame:Biblioteca Digital de Teses e Dissertações da USPinstname:Universidade de São Paulo (USP)instacron:USP2023-12-21T18:16:40Zoai:teses.usp.br:tde-05092016-153520Biblioteca Digital de Teses e Dissertaçõeshttp://www.teses.usp.br/PUBhttp://www.teses.usp.br/cgi-bin/mtd2br.plvirginia@if.usp.br|| atendimento@aguia.usp.br||virginia@if.usp.bropendoar:27212017-09-04T21:05:35Biblioteca Digital de Teses e Dissertações da USP - Universidade de São Paulo (USP)false
dc.title.en.fl_str_mv Pico- and nanoplankton abundance and biomass in the Southwest Atlantic Ocean off Brazil
dc.title.alternative.pt.fl_str_mv Abundância e biomassa pico- e nanoplanctônica no sudoeste do Oceano Atlântico ao largo da costa do Brasil
title Pico- and nanoplankton abundance and biomass in the Southwest Atlantic Ocean off Brazil
spellingShingle Pico- and nanoplankton abundance and biomass in the Southwest Atlantic Ocean off Brazil
Catherine Gerikas Ribeiro
title_short Pico- and nanoplankton abundance and biomass in the Southwest Atlantic Ocean off Brazil
title_full Pico- and nanoplankton abundance and biomass in the Southwest Atlantic Ocean off Brazil
title_fullStr Pico- and nanoplankton abundance and biomass in the Southwest Atlantic Ocean off Brazil
title_full_unstemmed Pico- and nanoplankton abundance and biomass in the Southwest Atlantic Ocean off Brazil
title_sort Pico- and nanoplankton abundance and biomass in the Southwest Atlantic Ocean off Brazil
author Catherine Gerikas Ribeiro
author_facet Catherine Gerikas Ribeiro
author_role author
dc.contributor.advisor1.fl_str_mv Frederico Pereira Brandini
dc.contributor.referee1.fl_str_mv Vivian Helena Pellizari
dc.contributor.referee2.fl_str_mv Janaina Rigonato
dc.contributor.referee3.fl_str_mv Fabiano Lopes Thompson
dc.contributor.referee4.fl_str_mv Daniel Vaulot
dc.contributor.author.fl_str_mv Catherine Gerikas Ribeiro
contributor_str_mv Frederico Pereira Brandini
Vivian Helena Pellizari
Janaina Rigonato
Fabiano Lopes Thompson
Daniel Vaulot
description Flow cytometry (FCM) is a well established technique used for enumeration and characterization of marine biological particles, which fulfills the scientific demands of rapid cell counting automation. FCM allows the discrimination of pico- and nanoplankton populations regarding its abundance, cell size, and pigment content both by natural or induced fluorescence. The cyanobacterium Prochlorococcus is widespread in the euphotic zone of the tropical and subtropical oceans, and is considered the smallest and most abundant photosynthetic organism in the planet. Synechococcus, other important cyanobacterium genus present in the picoplankton, is highly diverse and is widely distributed in marine ecosystems from cold and mesotrophic, to warm, open ocean oligotrophic waters. Photosynthetic pico- and nanoeukaryotes display a range of physiologies and life strategies. Although its abundance is generally lower, the larger cell size leads to a significant contribution to the epipelagic community biomass. In this thesis I aimed to investigate the abundance and carbon biomass distribution of heterotrophic bacteria, Prochlorococcus, Synechococcus, autotrophic pico- and nanoeukaryotes in the Southwest Atlantic Ocean off Brazil, their relation to the different water masses and the influence of hydrodynamic (South Atlantic Central Water intrusion) and biological processes (Trichodesmium spp. and Mesodinium rubrum blooms) on such distributions.
publishDate 2016
dc.date.issued.fl_str_mv 2016-03-23
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/doctoralThesis
format doctoralThesis
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://doi.org/10.11606/T.21.2016.tde-05092016-153520
url https://doi.org/10.11606/T.21.2016.tde-05092016-153520
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.publisher.none.fl_str_mv Universidade de São Paulo
dc.publisher.program.fl_str_mv Oceanografia
dc.publisher.initials.fl_str_mv USP
dc.publisher.country.fl_str_mv BR
publisher.none.fl_str_mv Universidade de São Paulo
dc.source.none.fl_str_mv reponame:Biblioteca Digital de Teses e Dissertações da USP
instname:Universidade de São Paulo (USP)
instacron:USP
instname_str Universidade de São Paulo (USP)
instacron_str USP
institution USP
reponame_str Biblioteca Digital de Teses e Dissertações da USP
collection Biblioteca Digital de Teses e Dissertações da USP
repository.name.fl_str_mv Biblioteca Digital de Teses e Dissertações da USP - Universidade de São Paulo (USP)
repository.mail.fl_str_mv virginia@if.usp.br|| atendimento@aguia.usp.br||virginia@if.usp.br
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