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Evidence of Dry and Cold Climatic Conditions at Glacial Times in Tropical Southeastern Brazil

Published online by Cambridge University Press:  20 January 2017

Hermann Behling
Affiliation:
Hugo de Vries-Laboratory, Dept. of Palynology and Paleo/Actuoecology, University of Amsterdam, Kruislaan 318, 1098 SM, Amsterdam
Martin Lichte
Affiliation:
Bahnhofstraßse 89, 26954, Nordenham, Germany

Abstract

Last-glacial paleoenvironments have been reconstructed from a pollen and charcoal record analyzed in organic sediments and dated between ca. 18,000 and >48,00014C yr B.P. The site is located near the village Catas Altas in the lower highland region of southeastern Brazil. The last-glacial landscape was covered by extensive areas of subtropical grasslands and small areas of gallery forests along the rivers, where tropical semideciduous forests and cerrado ecosystems exist today. The subtropical gallery forests were composed ofAraucariaforest trees such asAraucaria angustifolia, Podocarpus, Drimys, Ilex,andSymplocos.Paleofires were frequent. The record indicates that subtropical grassland vegetation, which today is found in patches on the highlands in southern Brazil (especially in the state of Santa Catarina), expanded from southern Brazil to southeastern Brazil, over a distance of more than 750 km, from latitudes of about 28° S to at least 20° S. The completely different last-glacial environment, in comparison to the present-day environment, reflects a dry and cold climate with strong frosts during the winter months. Temperatures of 5°–7°C below those of the present are inferred for the last glaciation.

Type
Research Article
Copyright
University of Washington

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