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	Provedor de dados Anais da ABC (AABC) (2) Autor Baptista-Neto,José A. (2) Barreto,Cintia F. (2) Barth,Ortrud M. (2) Vilela,Claudia G. (2) Luz,Cynthia F.P. da (1) Palavra-chave Guanabara Bay (2) Brazil (1) Deposition (1) Paleoenvironment (1) Palynomorphs (1) Pollen (1) Preservation (1) Quaternary Palynology (1) Surface sediments (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2012 (1) 2007 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Palynological analysis of a sediment core obtained in Guanabara Bay, Rio de Janeiro, Brazil Anais da ABC (AABC) 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 Spatial distribution of pollen grains and spores in surface sediments of Guanabara Bay, Rio de Janeiro, Brazil Anais da ABC (AABC) Barreto,Cintia F.; Vilela,Claudia G.; Baptista-Neto,José A.; Barth,Ortrud M.. Aiming to investigate the deposition of pollen grains and spores in Guanabara Bay, Rio de Janeiro State, 61 surface sediment samples were analyzed. The results showed that the current deposition of palynomorphs in surface sediments of Guanabara Bay represents the regional vegetation of this hydrographic basin. The differential distribution of palynomorphs followed a pattern influenced by bathymetry, tidal currents speed, discharge of numerous rivers, and by human activity. The dominance of representatives of Field Vegetation reflects the changes of the original flora caused by intense human activities in the region. The continued presence and richness of pollen types of rain forest in the samples indicates that their source area might be the vegetation... Tipo: Info:eu-repo/semantics/article Palavras-chave: Palynomorphs; Surface sediments; Deposition; Preservation; Guanabara Bay; Brazil. Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652012000300006 Registros recuperados: 2 Primeira ... 1 ... Última

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