Holocenic calcareous biolaminoids of the Vermelha lagoon, Brazil

Detalhes bibliográficos
Autor(a) principal: Silva e Silva, Loreine Hermida da
Data de Publicação: 2005
Outros Autores: Carvalhal, Sinda Beatriz Vianna
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/6294
Resumo: Lagoa Vermelha lies within the coordinates 22º55'39 - 22º56'06 S and 42º2129 - 42º24'13 W and is part of Araruama lagoon complex. Its dimensions are 4,400 m in length, 250 - 850 m in width, with approximate area of 2,400 m² and 0,2 - 1,7 m in depth. The study was based on six monthly collections in five stations over the north - east lagoon's margins from where was taken 20 samples of biolaminoids. To determinate the microbial composition of all different kinds of biolamonoids was made fresh and permanent slides and its analysis was carried out by microscopy. It was found three different kinds of microbial mats distributed throughout all five stations and were called: flat, polygonal and pustuled. Flat and polygonal microbial mats show itself layered, while pustuled show homogeneous structures. Layered and homogeneous ones present the same kind of main cyanobacterias, however layered mats in superficial stratum show preponderance of filamentous species and coccoid species in the bottom. Analysis showed a total of 33 species of cyanobacterias confirming it as main biolaminod component.The flat biolaminoid was mainly formed by Lyngbya aestuarii, the polygonal biolaminoid showed itself composed by Microcoleus chthonoplastes and the pustular biolaminoid was characterized by the presence of the cyanobacteria Chlorogoea tuberculosa. The cyanobacterial dominance is justified through its high morphologic adaptations that ensure its survival in many environments and prevail over in hipersaline local.
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spelling Holocenic calcareous biolaminoids of the Vermelha lagoon, BrazilBiolaminóides calcários holocênicos da lagoa Vermelha, BrasilLagoa Vermelha lies within the coordinates 22º55'39 - 22º56'06 S and 42º2129 - 42º24'13 W and is part of Araruama lagoon complex. Its dimensions are 4,400 m in length, 250 - 850 m in width, with approximate area of 2,400 m² and 0,2 - 1,7 m in depth. The study was based on six monthly collections in five stations over the north - east lagoon's margins from where was taken 20 samples of biolaminoids. To determinate the microbial composition of all different kinds of biolamonoids was made fresh and permanent slides and its analysis was carried out by microscopy. It was found three different kinds of microbial mats distributed throughout all five stations and were called: flat, polygonal and pustuled. Flat and polygonal microbial mats show itself layered, while pustuled show homogeneous structures. Layered and homogeneous ones present the same kind of main cyanobacterias, however layered mats in superficial stratum show preponderance of filamentous species and coccoid species in the bottom. Analysis showed a total of 33 species of cyanobacterias confirming it as main biolaminod component.The flat biolaminoid was mainly formed by Lyngbya aestuarii, the polygonal biolaminoid showed itself composed by Microcoleus chthonoplastes and the pustular biolaminoid was characterized by the presence of the cyanobacteria Chlorogoea tuberculosa. The cyanobacterial dominance is justified through its high morphologic adaptations that ensure its survival in many environments and prevail over in hipersaline local.A Lagoa Vermelha faz parte do complexo lagunar de Araruama e está situada entre as coordenadas 22º55'39 e 22º56'06 de latitude Sul e 42º21'29 e 42º24'13 de longitude Oeste de Greenwich. Suas dimensões são de 4.400 m de comprimento, 250-850 m de largura com uma área de aproximadamente 2.400 m² e profundidade de 0,2 a 1,7 m. Este estudo se baseou em coletas realizadas ao longo de cinco estações localizadas na margem nordeste da lagoa, onde foram retiradas 20 amostras de biolaminóides. Para a caracterização da composição microbiana dos tipos de biolaminóides foram confeccionadas lâminas frescas e permanentes e a sua análise foi realizada em microscopia. Foram encontrados três tipos de biolaminóides sendo eles liso, poligonal e pustular. Os biolaminóides liso e poligonal apresentaram estratificações enquanto o pustular apresentou-se homogêneo. Tanto os biolaminóides estratificados quanto o homogêneo mostraram-se compostos por um tipo principal de cianobactéria formadora; no entanto, os biolaminóides estratificados apresentaram na camada superficial a predominância das espécies filamentosas e nas camadas mais profundas o predomínio das cocóides. A análise dos biolaminóides encontrados revelou um total de 33 espécies de cianobactérias, comprovando que essas estruturas têm como seu agente formador principal estas microalgas. O biolaminóide liso revelou ser formado principalmente por Lyngbya aestuarii, o biolaminóide poligonal exibiuse composto por Microcoleus chthonoplastes e o pustular caracterizou-se pela presença da cianobactéria Chlorogoea tuberculosa. O predomínio das cianobactérias se justifica pelo fato destas serem portadoras de alta plasticidade morfológica, o que lhes permite sobreviver em vários ambientes e predominar nos hipersalinos.Universidade Federal do Rio de Janeiro2005-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://revistas.ufrj.br/index.php/aigeo/article/view/629410.11137/2005_2_59-70Anuário do Instituto de Geociências; Vol 28, No 2 (2005); 59-70Anuário do Instituto de Geociências; Vol 28, No 2 (2005); 59-701982-39080101-9759reponame:Anuário do Instituto de Geociências (Online)instname:Universidade Federal do Rio de Janeiro (UFRJ)instacron:UFRJporhttps://revistas.ufrj.br/index.php/aigeo/article/view/6294/4891Copyright (c) 2005 Anuário do Instituto de Geociênciashttp://creativecommons.org/licenses/by/4.0info:eu-repo/semantics/openAccessSilva e Silva, Loreine Hermida daCarvalhal, Sinda Beatriz Vianna2022-10-13T17:49:59Zoai:www.revistas.ufrj.br:article/6294Revistahttps://revistas.ufrj.br/index.php/aigeo/indexPUBhttps://revistas.ufrj.br/index.php/aigeo/oaianuario@igeo.ufrj.br||1982-39080101-9759opendoar:2022-10-13T17:49:59Anuário do Instituto de Geociências (Online) - Universidade Federal do Rio de Janeiro (UFRJ)false
dc.title.none.fl_str_mv Holocenic calcareous biolaminoids of the Vermelha lagoon, Brazil
Biolaminóides calcários holocênicos da lagoa Vermelha, Brasil
title Holocenic calcareous biolaminoids of the Vermelha lagoon, Brazil
spellingShingle Holocenic calcareous biolaminoids of the Vermelha lagoon, Brazil
Silva e Silva, Loreine Hermida da
title_short Holocenic calcareous biolaminoids of the Vermelha lagoon, Brazil
title_full Holocenic calcareous biolaminoids of the Vermelha lagoon, Brazil
title_fullStr Holocenic calcareous biolaminoids of the Vermelha lagoon, Brazil
title_full_unstemmed Holocenic calcareous biolaminoids of the Vermelha lagoon, Brazil
title_sort Holocenic calcareous biolaminoids of the Vermelha lagoon, Brazil
author Silva e Silva, Loreine Hermida da
author_facet Silva e Silva, Loreine Hermida da
Carvalhal, Sinda Beatriz Vianna
author_role author
author2 Carvalhal, Sinda Beatriz Vianna
author2_role author
dc.contributor.author.fl_str_mv Silva e Silva, Loreine Hermida da
Carvalhal, Sinda Beatriz Vianna
description Lagoa Vermelha lies within the coordinates 22º55'39 - 22º56'06 S and 42º2129 - 42º24'13 W and is part of Araruama lagoon complex. Its dimensions are 4,400 m in length, 250 - 850 m in width, with approximate area of 2,400 m² and 0,2 - 1,7 m in depth. The study was based on six monthly collections in five stations over the north - east lagoon's margins from where was taken 20 samples of biolaminoids. To determinate the microbial composition of all different kinds of biolamonoids was made fresh and permanent slides and its analysis was carried out by microscopy. It was found three different kinds of microbial mats distributed throughout all five stations and were called: flat, polygonal and pustuled. Flat and polygonal microbial mats show itself layered, while pustuled show homogeneous structures. Layered and homogeneous ones present the same kind of main cyanobacterias, however layered mats in superficial stratum show preponderance of filamentous species and coccoid species in the bottom. Analysis showed a total of 33 species of cyanobacterias confirming it as main biolaminod component.The flat biolaminoid was mainly formed by Lyngbya aestuarii, the polygonal biolaminoid showed itself composed by Microcoleus chthonoplastes and the pustular biolaminoid was characterized by the presence of the cyanobacteria Chlorogoea tuberculosa. The cyanobacterial dominance is justified through its high morphologic adaptations that ensure its survival in many environments and prevail over in hipersaline local.
publishDate 2005
dc.date.none.fl_str_mv 2005-01-01
dc.type.none.fl_str_mv

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identifier_str_mv 10.11137/2005_2_59-70
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/6294/4891
dc.rights.driver.fl_str_mv Copyright (c) 2005 Anuário do Instituto de Geociências
http://creativecommons.org/licenses/by/4.0
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rights_invalid_str_mv Copyright (c) 2005 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 28, No 2 (2005); 59-70
Anuário do Instituto de Geociências; Vol 28, No 2 (2005); 59-70
1982-3908
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