Chroococcales in blister microbial mats at brejo do Pau Fincado, Rio de Janeiro, Brazil

Detalhes bibliográficos
Autor(a) principal: Silva e Silva, Loreine Hermida da
Data de Publicação: 2007
Outros Autores: Lopes, Frederico Alves dos Santos, Delfino, Deise de Oliveira, Feder, Fabiane
Tipo de documento: Artigo
Idioma: por
Título da fonte: Anuário do Instituto de Geociências (Online)
Texto Completo: https://revistas.ufrj.br/index.php/aigeo/article/view/6713
Resumo: Chroococcales in blister microbial mats at brejo do Pau Fincado, Rio de Janeiro, Brazil. Brejo do Pau Fincado (22º55' 56,75" S e 42º16' 54,7" W) is a natural natural coastal aquatical body. It is located at the Lagoa de Araruama complex, formed at least 7000 years ago. The local climate is characterized by low precipitation rates and high evaporation rates; due to this, the lagoons tend to become hypersalyne. Microbial mats are organic-sedimentary structures composed mainly of cyanobacteria. Whilst the photosynthesis process cyanobacteria induct an environmental change, which leads to calcium carbonate precipitation. The aim of this study was to typify and identify the cyanobacteria at the blister microbial mat. Samples were processed and analyzed using an optical microscope. The blister mat is composed of twelve species of cyanobacteria disposed in a fragile and amorphous mass. In this structure, both quantitative and qualitative domains belong to Chroococcales Westtein 1924. Measurement has shown that the place is very selective, and cyanobacteria presented great resistance and adaptability, because they are forms which had got success surviving to big changes occurred on Earth since the beginning of life and the evolutionary history.
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spelling Chroococcales in blister microbial mats at brejo do Pau Fincado, Rio de Janeiro, BrazilChroococcales em esteiras microbianas em bolha do brejo do Pau Fincado, Rio de Janeiro, BrasilChroococcales in blister microbial mats at brejo do Pau Fincado, Rio de Janeiro, Brazil. Brejo do Pau Fincado (22º55' 56,75" S e 42º16' 54,7" W) is a natural natural coastal aquatical body. It is located at the Lagoa de Araruama complex, formed at least 7000 years ago. The local climate is characterized by low precipitation rates and high evaporation rates; due to this, the lagoons tend to become hypersalyne. Microbial mats are organic-sedimentary structures composed mainly of cyanobacteria. Whilst the photosynthesis process cyanobacteria induct an environmental change, which leads to calcium carbonate precipitation. The aim of this study was to typify and identify the cyanobacteria at the blister microbial mat. Samples were processed and analyzed using an optical microscope. The blister mat is composed of twelve species of cyanobacteria disposed in a fragile and amorphous mass. In this structure, both quantitative and qualitative domains belong to Chroococcales Westtein 1924. Measurement has shown that the place is very selective, and cyanobacteria presented great resistance and adaptability, because they are forms which had got success surviving to big changes occurred on Earth since the beginning of life and the evolutionary history.O brejo do Pau Fincado (22º55' 56,75" S e 42º16' 54,7" W) é um corpo aquático costeiro natural. Está localizado no complexo lagunar de Araruama, formado há aproximadamente 7000 anos atrás. O clima da região induz à baixa precipitação e elevadas taxas de evaporação. Com isso as lagoas tendem a ser hipersalinas. Esteiras microbianas são estruturas organossedimentares compostas principalmente por cianobactérias. Durante a realização da fotossíntese as cianobactérias induzem a mudança no ambiente, que culmina com a precipitação do carbonato de cálcio. Este trabalho teve por objetivo tipificar e identificar as cianobactérias presentes na esteira microbiana em bolha. Foram realizadas onze coletas e aferições dos parâmetros ambientais de agosto de 2005 até julho de 2006. As amostras foram processadas e analisadas utilizando o microscópio óptico. A esteira em bolha mostrou-se composta por doze espécies de cianobactérias dispostas em uma massa amorfa e frágil. O domínio qualitativo e quantitativo nesta estrutura é da ordem Chroococcales Westtein 1924. As aferições demonstraram que o local apresenta baixo teor de oxigênio dissolvido, pH elevado e varia de salobro a hipersalino. O ambiente é bastante seletivo, e as cianobactérias demonstram bastante resistência e adaptabilidade, pois são formas que obtiveram sucesso sobrevivendo as mais diversas mudanças que ocorreram na Terra desde o início da vida e história evolutiva.Universidade Federal do Rio de Janeiro2007-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://revistas.ufrj.br/index.php/aigeo/article/view/671310.11137/2007_1_188-193Anuário do Instituto de Geociências; Vol 30, No 1 (2007); 188-193Anuário do Instituto de Geociências; Vol 30, No 1 (2007); 188-1931982-39080101-9759reponame:Anuário do Instituto de Geociências (Online)instname:Universidade Federal do Rio de Janeiro (UFRJ)instacron:UFRJporhttps://revistas.ufrj.br/index.php/aigeo/article/view/6713/5310Copyright (c) 2007 Anuário do Instituto de Geociênciashttp://creativecommons.org/licenses/by/4.0info:eu-repo/semantics/openAccessSilva e Silva, Loreine Hermida daLopes, Frederico Alves dos SantosDelfino, Deise de OliveiraFeder, Fabiane2022-10-20T18:32:40Zoai:www.revistas.ufrj.br:article/6713Revistahttps://revistas.ufrj.br/index.php/aigeo/indexPUBhttps://revistas.ufrj.br/index.php/aigeo/oaianuario@igeo.ufrj.br||1982-39080101-9759opendoar:2022-10-20T18:32:40Anuário do Instituto de Geociências (Online) - Universidade Federal do Rio de Janeiro (UFRJ)false
dc.title.none.fl_str_mv Chroococcales in blister microbial mats at brejo do Pau Fincado, Rio de Janeiro, Brazil
Chroococcales em esteiras microbianas em bolha do brejo do Pau Fincado, Rio de Janeiro, Brasil
title Chroococcales in blister microbial mats at brejo do Pau Fincado, Rio de Janeiro, Brazil
spellingShingle Chroococcales in blister microbial mats at brejo do Pau Fincado, Rio de Janeiro, Brazil
Silva e Silva, Loreine Hermida da
title_short Chroococcales in blister microbial mats at brejo do Pau Fincado, Rio de Janeiro, Brazil
title_full Chroococcales in blister microbial mats at brejo do Pau Fincado, Rio de Janeiro, Brazil
title_fullStr Chroococcales in blister microbial mats at brejo do Pau Fincado, Rio de Janeiro, Brazil
title_full_unstemmed Chroococcales in blister microbial mats at brejo do Pau Fincado, Rio de Janeiro, Brazil
title_sort Chroococcales in blister microbial mats at brejo do Pau Fincado, Rio de Janeiro, Brazil
author Silva e Silva, Loreine Hermida da
author_facet Silva e Silva, Loreine Hermida da
Lopes, Frederico Alves dos Santos
Delfino, Deise de Oliveira
Feder, Fabiane
author_role author
author2 Lopes, Frederico Alves dos Santos
Delfino, Deise de Oliveira
Feder, Fabiane
author2_role author
author
author
dc.contributor.author.fl_str_mv Silva e Silva, Loreine Hermida da
Lopes, Frederico Alves dos Santos
Delfino, Deise de Oliveira
Feder, Fabiane
description Chroococcales in blister microbial mats at brejo do Pau Fincado, Rio de Janeiro, Brazil. Brejo do Pau Fincado (22º55' 56,75" S e 42º16' 54,7" W) is a natural natural coastal aquatical body. It is located at the Lagoa de Araruama complex, formed at least 7000 years ago. The local climate is characterized by low precipitation rates and high evaporation rates; due to this, the lagoons tend to become hypersalyne. Microbial mats are organic-sedimentary structures composed mainly of cyanobacteria. Whilst the photosynthesis process cyanobacteria induct an environmental change, which leads to calcium carbonate precipitation. The aim of this study was to typify and identify the cyanobacteria at the blister microbial mat. Samples were processed and analyzed using an optical microscope. The blister mat is composed of twelve species of cyanobacteria disposed in a fragile and amorphous mass. In this structure, both quantitative and qualitative domains belong to Chroococcales Westtein 1924. Measurement has shown that the place is very selective, and cyanobacteria presented great resistance and adaptability, because they are forms which had got success surviving to big changes occurred on Earth since the beginning of life and the evolutionary history.
publishDate 2007
dc.date.none.fl_str_mv 2007-01-01
dc.type.none.fl_str_mv

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url https://revistas.ufrj.br/index.php/aigeo/article/view/6713
identifier_str_mv 10.11137/2007_1_188-193
dc.language.iso.fl_str_mv por
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dc.relation.none.fl_str_mv https://revistas.ufrj.br/index.php/aigeo/article/view/6713/5310
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rights_invalid_str_mv Copyright (c) 2007 Anuário do Instituto de Geociências
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dc.publisher.none.fl_str_mv Universidade Federal do Rio de Janeiro
publisher.none.fl_str_mv Universidade Federal do Rio de Janeiro
dc.source.none.fl_str_mv Anuário do Instituto de Geociências; Vol 30, No 1 (2007); 188-193
Anuário do Instituto de Geociências; Vol 30, No 1 (2007); 188-193
1982-3908
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