%0 Journal Article
%9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES
%A Pessenda, L. C. R.
%A Saia, S.E.M.G.
%A Gouveia, S. E. M.
%A Ledru, Marie-Pierre
%A Sifeddine, Abdelfettah
%A Amaral, P. G. C.
%A Bendassolli, J. A.
%T Last millennium environmental changes and climate inferences in the Southeastern Atlantic forest, Brazil
%D 2010
%L fdi:010049047
%G ENG
%J Anais da Academia Brasileira de Ciencias
%@ 0001-3765
%K lacustrine sediment ; C and N isotopes ; pollen ; Atlantic Forest ; last millennium ; Little Ice Age
%M ISI:000281689200019
%N 3
%P 717-729
%R 10.1590/S0001-37652010000300019
%U https://www.documentation.ird.fr/hor/fdi:010049047
%> https://horizon.documentation.ird.fr/exl-doc/pleins_textes/divers16-08/010049047.pdf
%V 82
%W Horizon (IRD)
%X This study presents paleoenvironmental data based on pollen, elemental and isotopic compositions of organic matter (TOC, N, delta C-13 and delta N-15) and C-14 dating of 170 cm lake sediment record. Samplings have been made in Lagoa Grande at Parque Estadual Turistico do Alto Ribeira - PETAR, Southern Sao Paulo State, Southeastern Brazil. The variations in relative frequencies (in percentage) of arboreal pollen along the core range between 40 and 80%. The d13C values ranged from - 23 parts per thousand h to - 30 parts per thousand h and C/N of similar to 10 to 15, indicating the contribution of terrestrial C-3 plants and algae in the sediment organic matter. The delta N-15 results presented values from 3 to 4.5 h, also suggesting a mixture of algae and terrestrial C3 plants. The 14C dating indicates modern age for the shallow horizons to similar to 1030 BP at the base of the core. A probable wetter climate in the period of similar to 370 BP to similar to 340 BP was inferred from the data set, which corresponds to a part of the period covered by the Little Ice Age (LIA).
%$ 021 ; 064