Diversidade de grãos de pólen das principais fitofisionomias do cerrado e implicações paleoambientais

The  Cerrado is one of the most biodiverse biomes of Brazil and contains a great diversity of fitophysionomies. Over the past millennia, the vegetation of the Cerrado has been modified and influenced greatly by the climate changes and other factors, shaping the diversity exhibited today. Palynological studies of Quaternary sediments of the  Cerrado ’s region is an important source of information about these changes and about the history of this type of vegetation. The interpretation of this palinological records is improved by the characterization of modern pollen spectra and determination of the relationship between them and modern vegetation. With this purpose, this catalog presents the results of the analysis of surface samples collected in three national parks, where the native vegetation of the  Cerrado is preserved. Sixty pollen types are described and information about their occurrence and abundance in the different environments of the  Cerrado is given. Additionally, pollen taxa that can be considered paleo-indicators of certain fitophysionomies are determined. Keywords: Cerrado, pollen morphology, fitophysionomies.