alexa Palaeoclimatic and Palaeoenvironmental Changes in the Serra de Botucatu (Southeast Brazil) during the Late Pleistocene and Holocene | OMICS International| Abstract
ISSN: 2157-7617

Journal of Earth Science & Climatic Change
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  • Research Article   
  • J Earth Sci Climate Change 2013, Vol 4(1): 134
  • DOI: 10.4172/2157-7617.1000134

Palaeoclimatic and Palaeoenvironmental Changes in the Serra de Botucatu (Southeast Brazil) during the Late Pleistocene and Holocene

Walter Mareschi Bissa1*, Andreas Attila De Wolinsk Miklós2, Svetlana Medeanic3 and Eduardo Luís Martins Catharino4
1Museu de Arqueologia/Etnologia, Av. Prof. Almeida Prado, , 1466, São Paulo, CEP:05508-070, SP, Brazil
2Departamento de Geografia, FFLCH/Universidade de São Paulo, Av. Prof. Lineu Prestes, , 338, CEP:05508-000, São Paulo, SP, Brazil
3Laboratório de Oceanografia Geológica, FURG/Instituto de Oceanografia, Av. Itália, Km-08, Campus Carreiros, , Rio Grande, CEP:96201-900, RS, Brazil
4Instituto de Botanica, , Av. Miguel Estefano 3687, CEP:04301-012, Sao Paulo, SP, Brazil
*Corresponding Author : Walter Mareschi Bissa, Museu de Arqueologia/Etnologia, Av. Prof. Almeida Prado, 1466, São Paulo, CEP:05508-070, SP, Brazil, Tel: (55)11-3091-2887, Fax: (55)11-3091-5042, Email: [email protected]

Received Date: Jun 02, 2013 / Accepted Date: Feb 28, 2013 / Published Date: Mar 04, 2013

Abstract

We present a temporal resolution in pollen and spore assemblages study, obtained from core sampling at a peat deposit in Serra de Botucatu, located at 900 m altitude in São Paulo State, southeastern Brazilian Plateau. This region was covered by grassland vegetation and forest patches throughout the recorded period. The palynomorphs of Debarya algae, found in some samples, were also used as proxies for palaeoclimatic and palaeoenvironmental reconstructions. The palynological analysis of 27 samples from the Late Pleistocene-Holocene plus 14C dating, allowed the recognition of five distinct climatic and palaeoenvironmental phases (palynozones). Between 28,460-25,700 yrs BP climate was predominantly humid and cold (temperate cold and wet). Among 25,700-14,650 yrs BP climate became dry and less cold (predominantly temperate cold). After that, between 14,650-7240 yrs BP climate was predominantly cold and drier at the beginning of that period, then more humid and changed into dry and warmer at the end of this palynozone (predominantly temperate). Probably, the most humid time for this period was at the beginning of the Holocene. The time interval between 7240-3680 yrs BP was characterized by slightly warmer and more humid (predominantly temperate wet). An increase in temperature and humidity occurred after 3680 yrs BP until present (tropical climate of altitude). A predominantly short period of drier and colder climate was established around 2620 yrs BP. This paper contributes to a better understanding of the climatic oscillations throughout 28 K years, at an ecological tension zone between tropical and subtropical eastern South America continental shelf.

Keywords: Brazil; Palynology; Highlands; Palaeoclimate; Late Quaternary; Grassland; Marsh forest

Citation: Bissa WM, de Wolinsk Miklós AA, Medeanic S, Martins Catharino EL (2013) Palaeoclimatic and Palaeoenvironmental Changes in the Serra de Botucatu (Southeast Brazil) during the Late Pleistocene and Holocene. J Earth Sci Climate Change 4: 134. Doi: 10.4172/2157-7617.1000134

Copyright: ©2013 Bissa WM, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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