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| Registros recuperados: 10 | |
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| Luz,Cynthia F.P. da; Thomé,Marcos L.; Barth,Ortrud M.. |
| A vegetação original de Morro Azul, região serrana a noroeste da cidade do Rio de Janeiro, era constituída de Mata Atlântica. Sofreu modificações antrópicas e atualmente apresenta áreas de pastagens e manchas de mata remanescente. Ocorrem ainda áreas de reflorestamento com Pinus, Eucalyptus e outras espécies não nativas. O presente trabalho tem como objetivo avaliar, através da análise polínica, a contribuição de cada tipo de vegetação no fornecimento de néctar e pólen para as abelhas Apis mellifera. Onze amostras mensais de mel e nove de cargas de pólen foram obtidas de uma colméia-controle e preparadas para análise palinológica seguindo a metodologia padrão européia, sem aplicação de acetólise. Seis amostras de mel foram consideradas monoflorais,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Apis mellifera; Brasil; Mel; Pólen; Rio de Janeiro. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042007000100004 |
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| Barth,Ortrud M.; Freitas,Alex S.; Oliveira,Érika S.; Silva,Rosana A.; Maester,Fernanda M.; Andrella,Raquel R.S.; Cardozo,Gina M.B.Q.. |
| High quality of bee pollen for commercial purpose is required. In order to attend the consumer with the best identification of the botanical and floral origin of the product, 25 bee pollen batches were investigated using two techniques of pollen grain preparation. The first started to identify pollen loads of different colors in two grams of each well mixed batch, and the second to identify pollen grains in a pool made of all the pollen loads comprised in two grams. The best result was obtained by this last technique, when a pollen grain suspension was dropped on a microscope slide and circa 500 pollen grains were counted per sample. This analysis resulted in the recognition of monofloral and bifloral pollen batches, while the use of the first technique... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Apis; Pollen loads; Commercial pollen batches; Pollen analysis; Botanical origin. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652010000400011 |
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| Barth,Ortrud M.; Barreto,Cíntia F.; Coelho,Luciane G.; Luz,Cynthia F.P.. |
| Pollen analysis of a sediment sample obtained at 222 cm from the top of a drilling core collected in the Bay of Guanabara, Rio de Janeiro, was used as a tool to obtain more knowledge about pre-historical human living and environment. 14C datation revealed the age of 4210 years B.P. Most frequent pollen grains came from plants like Alchornea (Euphorbiaceae), Celtis (Ulmaceae), Lecythidaceae, Meliaceae, Ochnaceae and spores from forest Pteridophyta. Palynology and environmental studies revealed that agricultural activities could not be detected. The dense tropical rain forest was the dominant vegetation occurring in this region. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pollen; Paleoenvironment; Guanabara Bay; Rio de Janeiro; 4210 BP. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652004000300009 |
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| Barreto,Cintia F.; Luz,Cynthia F.P. da; Baptista-Neto,José A.; Vilela,Claudia G.; Barth,Ortrud M.. |
| The sediment of a core collected about 2 km north of Paquetá Island, Guanabara Bay, was submitted to pollen analysis, in order to recognize the dynamics of the regional vegetation, and the anthropic influence. Radiocarbon dating of a sample next to the bottom of the core indicates an age of 4.210 ± 40 14C yrs B.P (calibrated age). It was possible to establish four palynological zones. Starting at the bottom of the core, a decrease in palynomorph concentration, the presence of degraded pollen grains and spores, and the predominance of ombrophilous forest pollen grains were observed in the basal portion of Zone I. These data may indicate the presence of an exuberant Atlantic Forest, dominated by a marine regressive event. The concentration of well-preserved... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pollen; Quaternary Palynology; Guanabara Bay; Paleoenvironment. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652007000200005 |
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| Luz,Cynthia F.P. da; Barth,Ortrud M.; Silva,Cleverson G.. |
| Palynological analysis of pollen, Pteridophyta spores and algae deposited in the superficial sediments at Lagoa de Cima and Lagoa do Campelo Lakes, located in the north of Rio de Janeiro state, was used to determine the spatial variation of the palynomorphs deposition. A total of 67 pollen types were identified at Lagoa de Cima, with an expressive contribution of regional arboreous taxa, hydrophytes and ruderal plants of the pastureland. The depositional pattern of palynomorphs depends on the fluvial leakage, the proximity of the local sedimentation to the inlet of the Imbé and Urubu Rivers and the bathymetry of lake bottom. The highest concentrations of palynomorphs were observed in the decentralized and less deeper area, without the interference of the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Algae deposition; Campos dos Goitacazes municipality; Palynology; Pollen deposition. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652010000300016 |
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| Registros recuperados: 10 | |
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