Smooth layered microbial mats of the Brejo do Espinho, RJ, Brazil
Autor(a) principal: | |
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Data de Publicação: | 2007 |
Outros Autores: | , , , |
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/6712 |
Resumo: | Bogs are ecosystems found mainly in lower zones that separates inner and outer sandy terraces, and rivers and streams from valleys. These environments are always flooded or suffer seasonal flooding or can stay dry in a extended dry season. Its shallow waters increase the role of the sediment in the maintenance of such ecosystem. The Brejo do Espinho (22º56' S and 42º14'W) is a coastal body of water located 108 km from Rio de Janeiro city where are observed the development of thick microbial mats (about 2-4 cm in thickness). Aiming the characterization of the microbial mats, was made monthly collections in five collects in stations located in the bog borders. Microbial mats samples were taken using a spatula, deposited into plastics vials and later fixed with 4% formaldeid solution. For identification of the cyanobacterias, fresh and permanent slides were made. Smooth layered microbial mats present in subtidal and intertidal regions are composed by thin layers with different colors: green, red and brown, who show also distinct cyanobacterial composition. These structures show stratus of cohesive lamina with low lithification. Analysis revealed 27 species of cyanobacterias. Chroococcaceae Nägeli 1849 family was the main family found with 37% of the total frequency followed by Phormidiaceae Anagnostidis & Komárek 1988 family with 18,5%, Synechococcaceae Komárek & Anagnostidis 1995 family with 11,1%, Pseudanabaenaceae Anagnostidis & Komárek 1988 family with 11,1%, Entophysalidaceae Geitler 1925 family with 7,4%, Schizothricaceae Elenkin 1934 family with 7,4% and Oscillatoriaceae Gomont 1892 family with 7,4%. The domain of cyanobacterias in the Brejo do Espinho reflects its general plasticity that allows them to adapt to hostile conditions of the environment. |
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Smooth layered microbial mats of the Brejo do Espinho, RJ, BrazilTapetes microbianos lisos estratificados do Brejo do Espinho, RJ, BrasilBogs are ecosystems found mainly in lower zones that separates inner and outer sandy terraces, and rivers and streams from valleys. These environments are always flooded or suffer seasonal flooding or can stay dry in a extended dry season. Its shallow waters increase the role of the sediment in the maintenance of such ecosystem. The Brejo do Espinho (22º56' S and 42º14'W) is a coastal body of water located 108 km from Rio de Janeiro city where are observed the development of thick microbial mats (about 2-4 cm in thickness). Aiming the characterization of the microbial mats, was made monthly collections in five collects in stations located in the bog borders. Microbial mats samples were taken using a spatula, deposited into plastics vials and later fixed with 4% formaldeid solution. For identification of the cyanobacterias, fresh and permanent slides were made. Smooth layered microbial mats present in subtidal and intertidal regions are composed by thin layers with different colors: green, red and brown, who show also distinct cyanobacterial composition. These structures show stratus of cohesive lamina with low lithification. Analysis revealed 27 species of cyanobacterias. Chroococcaceae Nägeli 1849 family was the main family found with 37% of the total frequency followed by Phormidiaceae Anagnostidis & Komárek 1988 family with 18,5%, Synechococcaceae Komárek & Anagnostidis 1995 family with 11,1%, Pseudanabaenaceae Anagnostidis & Komárek 1988 family with 11,1%, Entophysalidaceae Geitler 1925 family with 7,4%, Schizothricaceae Elenkin 1934 family with 7,4% and Oscillatoriaceae Gomont 1892 family with 7,4%. The domain of cyanobacterias in the Brejo do Espinho reflects its general plasticity that allows them to adapt to hostile conditions of the environment.Os brejos são ecossistemas que ocupam principalmente as zonas baixas, que separam os terraços arenosos internos dos externos, e os vales dos rios e riachos. Estes ambientes são áreas permanentemente inundadas ou sujeitas às inundações sazonais, podendo permanecer secos em períodos de estiagem prolongada. A pequena profundidade e reduzida lâmina d'água nestas áreas potencializam o papel do sedimento no funcionamento do ecossistema. O Brejo do Espinho (22º56'S e 42º14' O) é um corpo aquático costeiro situado a 108 km da cidade do Rio de Janeiro, onde se observa o desenvolvimento de espessos tapetes microbianos de 2-4 cm de espessura. Visando a caracterização dos tapetes microbianos deste brejo, foram realizadas coletas mensais em cinco estações localizadas em suas margens. Amostras de tapetes microbianos foram retiradas com o auxílio de espátula, acondicionadas em frascos plásticos e posteriormente fixadas com formol a 4%. Para a identificação das cianobactérias foram confeccionadas lâminas a fresco e permanentes. Os tapetes microbianos lisos estratificados, presentes nas regiões de inframaré e entremarés, são compostos por finas laminações de coloração verde, vermelho e marrom, respectivamente, e apresentam composição cianobacteriana distinta. Estas estruturas se constituem em lâminas coesas, pouco litificadas e estratificadas, onde a análise revelou 27 espécies de cianobactérias. Nestes tapetes a família Chroococcaceae Nägeli 1849 foi a mais representativa qualitativamente com 37% da freqüência, seguida das famílias Phormidiaceae Anagnostidis & Komárek 1988 com 18,5%, Synechococcaceae Komárek & Anagnostidis 1995 com 11,1%, Pseudanabaenaceae Anagnostidis & Komárek 1988 com 11,1%, Entophysalidaceae Geitler 1925 com 7,4%, Schizothricaceae Elenkin 1934 com 7,4% e Oscillatoriaceae Gomont 1892 com 7,4%. O domínio das cianobactérias no Brejo do Espinho reflete a plasticidade destes organismos a se adaptarem as condições hostis do ambiente.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/671210.11137/2007_1_181-187Anuário do Instituto de Geociências; Vol 30, No 1 (2007); 181-187Anuário do Instituto de Geociências; Vol 30, No 1 (2007); 181-1871982-39080101-9759reponame:Anuário do Instituto de Geociências (Online)instname:Universidade Federal do Rio de Janeiro (UFRJ)instacron:UFRJporhttps://revistas.ufrj.br/index.php/aigeo/article/view/6712/5309Copyright (c) 2007 Anuário do Instituto de Geociênciashttp://creativecommons.org/licenses/by/4.0info:eu-repo/semantics/openAccessSilva, Loreine Hermida da Silva eDelfino, Deise de OliveiraFeder, FabianeLopes, Frederico Alves dos SantosGuimarães, Thiago Bertoche2022-10-20T18:32:40Zoai:www.revistas.ufrj.br:article/6712Revistahttps://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 |
Smooth layered microbial mats of the Brejo do Espinho, RJ, Brazil Tapetes microbianos lisos estratificados do Brejo do Espinho, RJ, Brasil |
title |
Smooth layered microbial mats of the Brejo do Espinho, RJ, Brazil |
spellingShingle |
Smooth layered microbial mats of the Brejo do Espinho, RJ, Brazil Silva, Loreine Hermida da Silva e |
title_short |
Smooth layered microbial mats of the Brejo do Espinho, RJ, Brazil |
title_full |
Smooth layered microbial mats of the Brejo do Espinho, RJ, Brazil |
title_fullStr |
Smooth layered microbial mats of the Brejo do Espinho, RJ, Brazil |
title_full_unstemmed |
Smooth layered microbial mats of the Brejo do Espinho, RJ, Brazil |
title_sort |
Smooth layered microbial mats of the Brejo do Espinho, RJ, Brazil |
author |
Silva, Loreine Hermida da Silva e |
author_facet |
Silva, Loreine Hermida da Silva e Delfino, Deise de Oliveira Feder, Fabiane Lopes, Frederico Alves dos Santos Guimarães, Thiago Bertoche |
author_role |
author |
author2 |
Delfino, Deise de Oliveira Feder, Fabiane Lopes, Frederico Alves dos Santos Guimarães, Thiago Bertoche |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Silva, Loreine Hermida da Silva e Delfino, Deise de Oliveira Feder, Fabiane Lopes, Frederico Alves dos Santos Guimarães, Thiago Bertoche |
description |
Bogs are ecosystems found mainly in lower zones that separates inner and outer sandy terraces, and rivers and streams from valleys. These environments are always flooded or suffer seasonal flooding or can stay dry in a extended dry season. Its shallow waters increase the role of the sediment in the maintenance of such ecosystem. The Brejo do Espinho (22º56' S and 42º14'W) is a coastal body of water located 108 km from Rio de Janeiro city where are observed the development of thick microbial mats (about 2-4 cm in thickness). Aiming the characterization of the microbial mats, was made monthly collections in five collects in stations located in the bog borders. Microbial mats samples were taken using a spatula, deposited into plastics vials and later fixed with 4% formaldeid solution. For identification of the cyanobacterias, fresh and permanent slides were made. Smooth layered microbial mats present in subtidal and intertidal regions are composed by thin layers with different colors: green, red and brown, who show also distinct cyanobacterial composition. These structures show stratus of cohesive lamina with low lithification. Analysis revealed 27 species of cyanobacterias. Chroococcaceae Nägeli 1849 family was the main family found with 37% of the total frequency followed by Phormidiaceae Anagnostidis & Komárek 1988 family with 18,5%, Synechococcaceae Komárek & Anagnostidis 1995 family with 11,1%, Pseudanabaenaceae Anagnostidis & Komárek 1988 family with 11,1%, Entophysalidaceae Geitler 1925 family with 7,4%, Schizothricaceae Elenkin 1934 family with 7,4% and Oscillatoriaceae Gomont 1892 family with 7,4%. The domain of cyanobacterias in the Brejo do Espinho reflects its general plasticity that allows them to adapt to hostile conditions of the environment. |
publishDate |
2007 |
dc.date.none.fl_str_mv |
2007-01-01 |
dc.type.none.fl_str_mv |
|
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://revistas.ufrj.br/index.php/aigeo/article/view/6712 10.11137/2007_1_181-187 |
url |
https://revistas.ufrj.br/index.php/aigeo/article/view/6712 |
identifier_str_mv |
10.11137/2007_1_181-187 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://revistas.ufrj.br/index.php/aigeo/article/view/6712/5309 |
dc.rights.driver.fl_str_mv |
Copyright (c) 2007 Anuário do Instituto de Geociências http://creativecommons.org/licenses/by/4.0 info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2007 Anuário do Instituto de Geociências http://creativecommons.org/licenses/by/4.0 |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
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); 181-187 Anuário do Instituto de Geociências; Vol 30, No 1 (2007); 181-187 1982-3908 0101-9759 reponame:Anuário do Instituto de Geociências (Online) instname:Universidade Federal do Rio de Janeiro (UFRJ) instacron:UFRJ |
instname_str |
Universidade Federal do Rio de Janeiro (UFRJ) |
instacron_str |
UFRJ |
institution |
UFRJ |
reponame_str |
Anuário do Instituto de Geociências (Online) |
collection |
Anuário do Instituto de Geociências (Online) |
repository.name.fl_str_mv |
Anuário do Instituto de Geociências (Online) - Universidade Federal do Rio de Janeiro (UFRJ) |
repository.mail.fl_str_mv |
anuario@igeo.ufrj.br|| |
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1797053541156651008 |