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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; Bacha Junior,Gabriel L.; Fonseca,Rafael L.S. e; Sousa,Priscila R. de. |
| The aim of this study was to investigate the polliniferous floral sources used by Apis mellifera (L.) (africanized) in an apiary situated in Pará de Minas, Minas Gerais state, and evaluate the pollen prefences among the beehives. Two beehives of Langstroth type with frontal pollen trap collectors were used. The harvest was made from September 2007 to March 2008, with three samples of pollen pellets colected per month per beehive. The subsamples of 2 grams each were prepared according to the European standard melissopalynological method. A total of 56 pollen types were observed, identifying 43 genus and 32 families. The families that showed the major richness of pollen types were: Mimosaceae (8), Asteraceae (6), Fabaceae (3), Arecaceae (3), Euphorbiaceae... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Africanized Apis mellifera; Brazil; Para de Minas; Pollen pellets; Polliniferous flora. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652010000200005 |
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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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| 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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