Aviles A. M. C., Ricardi-Branco F., Ledru Marie-Pierre, Bernacci L. C. (2019). Vegetation and climate changes in the forest of Campinas, Sao Paulo State, Brazil, during the last 25,000 cal yr BP. Brazilian Journal of Geology, 49 (3), p. e20190040 [11 p.]. ISSN 2317-4889.
Titre du document
Vegetation and climate changes in the forest of Campinas, Sao Paulo State, Brazil, during the last 25,000 cal yr BP
Aviles A. M. C., Ricardi-Branco F., Ledru Marie-Pierre, Bernacci L. C.
Source
Brazilian Journal of Geology, 2019,
49 (3), p. e20190040 [11 p.] ISSN 2317-4889
A paleoenvironmental reconstruction was performed in a Riparian Forest near Campinas to improve knowledge of paleoclimate and paleoenvironment in the State of Sao Paulo, Brazil. A sediment core of 182 cm depth was collected in a swamp located within a Cerrado/Seasonal Semi-deciduous ecotone forest. The chronological frame is given by eight radiocarbon dating methods. Pollen and stable isotope analyses (delta C-13 and delta N-15) were performed all along the core. Modern pollen rain is based on five surface samples collected along the Riparian Forest. Results show a sequence of changes in vegetation and climate between 25 and 13 cal kyr before present (BP), and from 4 cal kyr BP to the present time, with a hiatus between 11 and 4 kyr cal BP. Drier climatic conditions characterized the late Pleistocene and early Holocene, although they had moisture peaks able to maintain an open forest. The Riparian Forest became fully installed from 4 cal kyr BP onward. Our results are in agreement with other regional studies and contribute to build a regional frame for past climatic conditions at the latitude of Sao Paulo.
Plan de classement
Sciences du milieu [021]
;
Géologie et formations superficielles [064]
;
Etudes, transformation, conservation du milieu naturel [082]
