Cianobactérias em esteiras microbianas coloformes da lagoa Pitanguinha, Rio de Janeiro, Brasil

Damazio, Cynthia Moreira; Silva, Loreine Hermida Silva e

doi:10.4072/rbp.2006.1.17

Cited by 7 publications

(7 citation statements)

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“…Sampling sites (EB1, EB2, and EB3, respectively) were selected based on the occurrence of cyanobacterial-dominated mats, as previously indicated in Damazio and Silva (2006), Iespa and Silva (2005), and Silva et al (2005, 2006). EB1 is placed in the eastern part of Araruama, at the entry of a confined, temporary pond connected to the main lagoon by a small channel (Supplementary Image S1).…”

Section: Methodsmentioning

confidence: 99%

“…Samples were collected from three lagoons of the Araruama complex (Figure 1 ): Araruama (the main lagoon; 22°56′36.0″S 42°06′02.0″W), Pitanguinha (22°55′39.0″S 42°21′20.0″W), and Pernambuco (22°55′50.0″S 42°18′86.0″W). Sampling sites (EB1, EB2, and EB3, respectively) were selected based on the occurrence of cyanobacterial-dominated mats, as previously indicated in Damazio and Silva ( 2006 ), Iespa and Silva ( 2005 ), and Silva et al ( 2005 , 2006 ). EB1 is placed in the eastern part of Araruama, at the entry of a confined, temporary pond connected to the main lagoon by a small channel (Supplementary Image S1 ).…”

Section: Methodsmentioning

confidence: 99%

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Cyanobacterial Diversity in Microbial Mats from the Hypersaline Lagoon System of Araruama, Brazil: An In-depth Polyphasic Study

et al. 2017

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Microbial mats are complex, micro-scale ecosystems that can be found in a wide range of environments. In the top layer of photosynthetic mats from hypersaline environments, a large diversity of cyanobacteria typically predominates. With the aim of strengthening the knowledge on the cyanobacterial diversity present in the coastal lagoon system of Araruama (state of Rio de Janeiro, Brazil), we have characterized three mat samples by means of a polyphasic approach. We have used morphological and molecular data obtained by culture-dependent and -independent methods. Moreover, we have compared different classification methodologies and discussed the outcomes, challenges, and pitfalls of these methods. Overall, we show that Araruama's lagoons harbor a high cyanobacterial diversity. Thirty-six unique morphospecies could be differentiated, which increases by more than 15% the number of morphospecies and genera already reported for the entire Araruama system. Morphology-based data were compared with the 16S rRNA gene phylogeny derived from isolate sequences and environmental sequences obtained by PCR-DGGE and pyrosequencing. Most of the 48 phylotypes could be associated with the observed morphospecies at the order level. More than one third of the sequences demonstrated to be closely affiliated (best BLAST hit results of ≥99%) with cyanobacteria from ecologically similar habitats. Some sequences had no close relatives in the public databases, including one from an isolate, being placed as “loner” sequences within different orders. This hints at hidden cyanobacterial diversity in the mats of the Araruama system, while reinforcing the relevance of using complementary approaches to study cyanobacterial diversity.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Cyanobacterial Diversity in Microbial Mats from the Hypersaline Lagoon System of Araruama, Brazil: An In-depth Polyphasic Study

et al. 2017

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“…Em Damazio (1994) o enfoque da assistência social acompanha a perspectiva histórica da abordagem da autora. A autora chama atenção para o fato de que, no início das atividades assistenciais desenvolvidas pela FEB, havia uma discrepância entre o número de pessoas que assistiam as reuniões doutrinárias (em menor número) e aquelas que compareciam aos trabalhos assistenciais (em maior número).…”

Section: Consideraçõesunclassified

“…Nesse sentido, ele está relacionado aos esforços realizados por vários autores (Arribas, 2010;Camargo, 1961;Cavalcanti, 1983;Damazio, 1994;Giumbelli, 1998;Laplantine e Aubrèe, 2009;Vilhena, 2008) visando elucidar um campo de atuação relevante para estes atores: seu trabalho assistencial. Parte-se aqui de uma hipótese que não poderá ser demonstrada inteiramente ao longo deste artigo: a de que há uma forte consistência e coerência entre a concepção que os espíritas formulam sobre assistência social e os trabalhos que eles implementam.…”

Section: Introductionunclassified

A concepção dos espíritas sobre assistência social

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2017

Ciências Sociais Unisinos

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“…A lagoa Pitanguinha (Figura 1) possui aproximadamente de 0,55 km², sendo 1,5 km de comprimento e 0,75 km de largura, está localizada entre as latitudes 22º55'42" e 22º56'00" S e longitudes 42º20'45" e 42º21'30" W, próximo ao Município de Araruama (Damazio & Silva e Silva, 2006 (Damazio, 2004).…”

Section: áRea De Estudounclassified

Estudo sedimentológico e geomicrobiológico das esteiras microbianas tipo filme da lagoa Pitanguinha, região dos lagos, Estado do Rio de Janeiro, Brasil

2007

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The lagoa Pitanguinha has an area of approximately 0.55 kmÂ², of which 1.5 km are in length, it is located between the latitudes of 22º 55'42''and 22º 56'00'' S and longitudes of 42º20'45'' and 42º20'30'' W, at the restinga de Massambaba, near the district of Araruama. The microbial mats are laminate organosedimentary structures and have been called "algal mat", "cyanobacteria mat" and "potential stromatolite", because there is the predominance of cyanobacteria species that are responsible for the formation of the laminate sediment structure. These mats are the oldest known ecosystem. The aim of this study is to determine the geomicrobiology and sedimentary composition of film microbial mats at lagoa Pitanguinha. The film mat appeared to be placed at the intertidal region and has the form of a flat laminae, with a porous and coherent aspect, being composed of lithified sediment compound with crystalclear incrustation. In its inner side the presence shell fragment of bivalve, microgastropod, ostracod and quartz grains of sand size. The main species of cyanobacteria present in the film microbial mat is Entophysalis granulosa Kützing 1843. On the superficial layers of the film microbial mats, sediment grains are much more united due to the presence of filament cyanobacteria that traps and unites the sediment. The rest of the space is filled by spherical cyanobacteria. On deeper layers of the film microbial mats, sediment grains are much more scattered, due to the presence of few filament cyanobacteria and many spherical ones.

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Cianobactérias em esteiras microbianas coloformes da lagoa Pitanguinha, Rio de Janeiro, Brasil

Cited by 7 publications

References 8 publications

Cyanobacterial Diversity in Microbial Mats from the Hypersaline Lagoon System of Araruama, Brazil: An In-depth Polyphasic Study

Cyanobacterial Diversity in Microbial Mats from the Hypersaline Lagoon System of Araruama, Brazil: An In-depth Polyphasic Study

A concepção dos espíritas sobre assistência social

Estudo sedimentológico e geomicrobiológico das esteiras microbianas tipo filme da lagoa Pitanguinha, região dos lagos, Estado do Rio de Janeiro, Brasil

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