Last millennium environmental changes and climate inferences in the Southeastern Atlantic forest, Brazil Pessenda, L. C. R. Saia, S.E.M.G. Gouveia, S. E. M. /Ledru, Marie-Pierre /Sifeddine, Abdelfettah Amaral, P. G. C. Bendassolli, J. A. lacustrine sediment C and N isotopes pollen Atlantic Forest last millennium Little Ice Age 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). 2010 text https://www.documentation.ird.fr/hor/fdi:010049047 fdi:010049047 Pessenda L. C. R., Saia S.E.M.G., Gouveia S. E. M., Ledru Marie-Pierre, Sifeddine Abdelfettah, Amaral P. G. C., Bendassolli J. A.. Last millennium environmental changes and climate inferences in the Southeastern Atlantic forest, Brazil. 2010, 82 (3), 717-729 EN