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	Provedor de dados Anais da ABC (AABC) (1) Autor Bush,Mark B. (1) Toledo,Mauro B. de (1) Palavra-chave Amazonia (1) Climate change (1) Palaeoecology (1) Palaeofires (1) Pollen record (1) Savannas (1) Mais... Tipo do documento Info:eu-repo/semantics/article (1) Ano 2008 (1) País Brazil (1) Idioma Inglês (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 1 Primeira ... 1 ... Última A Holocene pollen record of savanna establishment in coastal Amapá Anais da ABC (AABC) Toledo,Mauro B. de; Bush,Mark B.. The main goal of this study was to investigate how climate and human activities may have influenced ecotonal areas of disjoint savannas within Brazilian Amazonia. The fossil pollen and charcoal records of Lake Márcio (Amapá) were used to provide a Holocene palaeoecological history of this region. Detrended correspondence analysis (DCA) was used to enhance the patterns of sample distribution along the sediment core. A marked vegetation change from closed forests with swamp elements to open flooded savanna at c. 5000 yrs BP was evident from the pollen record. Charcoal analysis revealed a pattern of increased accumulation of particles coincident with the establishment of savannas, suggesting higher fire frequency and human impacts near the lake. A 550-year... Tipo: Info:eu-repo/semantics/article Palavras-chave: Pollen record; Palaeofires; Amazonia; Savannas; Climate change; Palaeoecology. Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652008000200013 Registros recuperados: 1 Primeira ... 1 ... Última

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