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SOUTHERN BRAZILIAN LATE QUATERNARY VEGETATION, FIRE AND CLIMATE DYNAMICS BASED ON PALYNOLOGICAL DATA AND MULTIVARIATE ANALYSIS. The vegetation of the campanha region of the Rio Grande do Sul state is composed by field formation, with rare and sparse gallery forests along some small rivers. Palynological research have been developed in others localities of the State, mainly in areas of the coastal plain and the plateau of Serra Geral. An important question, discussed among the botanicists is if during the Holocene the landscape of the campanha region was the same that it is now or if there were restrict forest formations. Palynological studies can significativaly contribute to the understanding of this question. A preliminary analysis in a transitional zone between forests and grasslands of the Rio Grande do Sul State allow to conclude that in the late Holocene (3.000 yr. B.P.) the grasslands absolutely dominated over other vegetational formations. Significant exchanges occurred only within the grasslands, sometimes with the prevalence of Poaceae and Baccharis type (dry fields), other times of Cyperaceae (wet/uliginous fields).

Dinâmicas vegetacionais, climáticas e do fogo com base em palinologia e análise multivariada no Quaternário tardio do sul do Brasil