Registros palinológicos em amostras de sedimentos do Quaternário tardio do médio rio Madeira, Brasil

Abstract

This work reconstructs the vegetation of the várzea Madeira River, Brazil, by using palynological data. Out of a total of 49 sediment samples from the Madeira River bank that were processed, ten contained pollen: two showed midglacial age, one late glacial age, six of Holocene ages and one recent. One of the two midglacial samples records a chavascal and the other a várzea of primary succession. The sample of late glacial age records a várzea late succession. Of a total of six Holocene samples, three are chavascal and the other three are late várzea succession. A sample of recent age records a late secondary várzea. The paleovegetation of the Madeira River is represented in the form of a mosaic that can be explained by the fluvial dynamics of the river, by the great richness and diversity of this species and the existence of dominant species in the várzea.