Distribution of HNA and LNA bacterial groups in the Southwest Atlantic Ocean

Detalhes bibliográficos
Autor(a) principal: Andrade,Luciana
Data de Publicação: 2007
Outros Autores: Gonzalez,Alessandra M., Rezende,Carlos Eduardo, Suzuki,Marina, Valentin,Jean Louis, Paranhos,Rodolfo
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Brazilian Journal of Microbiology
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822007000200028
Resumo: Bacterioplankton was studied in a large area of Southwest Atlantic Ocean between 13 and 25ºS and 28 and 42ºW. Samples were collected in 108 stations at 20 m depth. Bacteria were enumerated by flow cytometry after nucleic acid staining with syto13 and two subgroups were differentiated: low nucleic acid content (LNA) and high nucleic acid content (HNA) bacteria. Total bacterial numbers varied from 0.37 to 5.53 10(5) cells mL-1. HNA cells represented 15 to 70% of the total number while LNA cells represented 30 to 85%. Heterotrophic bacterial production was determined by incorporation of tritiated leucine and ranged from 2.7 to 171.07 ng C L-1 h-1. No significant correlation was found between abundance and production. Nevertheless with support of multivariate analysis between bacterial abundance, bacterial production, chlorophyll a and other oceanographic data the distribution of the groups in two different oceanic provinces could be explained by nutrient availability. HNA bacteria accounted for the high percentage of cells found in the area north of 19ºS, linked to higher temperature waters and riverine nutrients inputs. LNA bacteria were the dominant cells south of this latitude and were correlated to the higher values of nitrate found for the same area.
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spelling Distribution of HNA and LNA bacterial groups in the Southwest Atlantic Oceanbacterial abundanceHNA bacteriaLNA bacteriaflow cytometrySouthwest Atlantic OceanBacterioplankton was studied in a large area of Southwest Atlantic Ocean between 13 and 25ºS and 28 and 42ºW. Samples were collected in 108 stations at 20 m depth. Bacteria were enumerated by flow cytometry after nucleic acid staining with syto13 and two subgroups were differentiated: low nucleic acid content (LNA) and high nucleic acid content (HNA) bacteria. Total bacterial numbers varied from 0.37 to 5.53 10(5) cells mL-1. HNA cells represented 15 to 70% of the total number while LNA cells represented 30 to 85%. Heterotrophic bacterial production was determined by incorporation of tritiated leucine and ranged from 2.7 to 171.07 ng C L-1 h-1. No significant correlation was found between abundance and production. Nevertheless with support of multivariate analysis between bacterial abundance, bacterial production, chlorophyll a and other oceanographic data the distribution of the groups in two different oceanic provinces could be explained by nutrient availability. HNA bacteria accounted for the high percentage of cells found in the area north of 19ºS, linked to higher temperature waters and riverine nutrients inputs. LNA bacteria were the dominant cells south of this latitude and were correlated to the higher values of nitrate found for the same area.Sociedade Brasileira de Microbiologia2007-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822007000200028Brazilian Journal of Microbiology v.38 n.2 2007reponame:Brazilian Journal of Microbiologyinstname:Sociedade Brasileira de Microbiologia (SBM)instacron:SBM10.1590/S1517-83822007000200028info:eu-repo/semantics/openAccessAndrade,LucianaGonzalez,Alessandra M.Rezende,Carlos EduardoSuzuki,MarinaValentin,Jean LouisParanhos,Rodolfoeng2007-06-29T00:00:00Zoai:scielo:S1517-83822007000200028Revistahttps://www.scielo.br/j/bjm/ONGhttps://old.scielo.br/oai/scielo-oai.phpbjm@sbmicrobiologia.org.br||mbmartin@usp.br1678-44051517-8382opendoar:2007-06-29T00:00Brazilian Journal of Microbiology - Sociedade Brasileira de Microbiologia (SBM)false
dc.title.none.fl_str_mv Distribution of HNA and LNA bacterial groups in the Southwest Atlantic Ocean
title Distribution of HNA and LNA bacterial groups in the Southwest Atlantic Ocean
spellingShingle Distribution of HNA and LNA bacterial groups in the Southwest Atlantic Ocean
Andrade,Luciana
bacterial abundance
HNA bacteria
LNA bacteria
flow cytometry
Southwest Atlantic Ocean
title_short Distribution of HNA and LNA bacterial groups in the Southwest Atlantic Ocean
title_full Distribution of HNA and LNA bacterial groups in the Southwest Atlantic Ocean
title_fullStr Distribution of HNA and LNA bacterial groups in the Southwest Atlantic Ocean
title_full_unstemmed Distribution of HNA and LNA bacterial groups in the Southwest Atlantic Ocean
title_sort Distribution of HNA and LNA bacterial groups in the Southwest Atlantic Ocean
author Andrade,Luciana
author_facet Andrade,Luciana
Gonzalez,Alessandra M.
Rezende,Carlos Eduardo
Suzuki,Marina
Valentin,Jean Louis
Paranhos,Rodolfo
author_role author
author2 Gonzalez,Alessandra M.
Rezende,Carlos Eduardo
Suzuki,Marina
Valentin,Jean Louis
Paranhos,Rodolfo
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Andrade,Luciana
Gonzalez,Alessandra M.
Rezende,Carlos Eduardo
Suzuki,Marina
Valentin,Jean Louis
Paranhos,Rodolfo
dc.subject.por.fl_str_mv bacterial abundance
HNA bacteria
LNA bacteria
flow cytometry
Southwest Atlantic Ocean
topic bacterial abundance
HNA bacteria
LNA bacteria
flow cytometry
Southwest Atlantic Ocean
description Bacterioplankton was studied in a large area of Southwest Atlantic Ocean between 13 and 25ºS and 28 and 42ºW. Samples were collected in 108 stations at 20 m depth. Bacteria were enumerated by flow cytometry after nucleic acid staining with syto13 and two subgroups were differentiated: low nucleic acid content (LNA) and high nucleic acid content (HNA) bacteria. Total bacterial numbers varied from 0.37 to 5.53 10(5) cells mL-1. HNA cells represented 15 to 70% of the total number while LNA cells represented 30 to 85%. Heterotrophic bacterial production was determined by incorporation of tritiated leucine and ranged from 2.7 to 171.07 ng C L-1 h-1. No significant correlation was found between abundance and production. Nevertheless with support of multivariate analysis between bacterial abundance, bacterial production, chlorophyll a and other oceanographic data the distribution of the groups in two different oceanic provinces could be explained by nutrient availability. HNA bacteria accounted for the high percentage of cells found in the area north of 19ºS, linked to higher temperature waters and riverine nutrients inputs. LNA bacteria were the dominant cells south of this latitude and were correlated to the higher values of nitrate found for the same area.
publishDate 2007
dc.date.none.fl_str_mv 2007-06-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822007000200028
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822007000200028
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S1517-83822007000200028
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Sociedade Brasileira de Microbiologia
publisher.none.fl_str_mv Sociedade Brasileira de Microbiologia
dc.source.none.fl_str_mv Brazilian Journal of Microbiology v.38 n.2 2007
reponame:Brazilian Journal of Microbiology
instname:Sociedade Brasileira de Microbiologia (SBM)
instacron:SBM
instname_str Sociedade Brasileira de Microbiologia (SBM)
instacron_str SBM
institution SBM
reponame_str Brazilian Journal of Microbiology
collection Brazilian Journal of Microbiology
repository.name.fl_str_mv Brazilian Journal of Microbiology - Sociedade Brasileira de Microbiologia (SBM)
repository.mail.fl_str_mv bjm@sbmicrobiologia.org.br||mbmartin@usp.br
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