For climate reconstructions we need a network of climate stations with good, long, concise and high-quality data, that is current unavailable in the Serra do Mar mountain range, Paraná, Brazil. As so, tree-ring chronologies can provide important data on climate, that can be reconstructed to understand the temperature variability in these mountains. The most important species of the tropical cloud forests in Paraná State, Ilex microdonta, form distinct tree rings and are sensitive to climate change, playing an important role in these communities. The objective of this research is to reconstruct the minimum temperatures in Serra do Mar and indicate the applicability of the technique in this region. The 30 trees for the chronology building (1802-2016) were sampled in Mãe Catira and Sete peaks (1,430 m a.s.l.), and the climate data for reconstruction were obtained by CRU temperature dataset (25,5° S; 49° W). We used PCR methodology with minimum AIC criteria for the best model evaluation. We were able to reconstruct 100 years of late spring and summer minimum temperatures, with RE and CE ≥ 0.498 and R² = 0.32. Although the results indicate low statistics for climate reconstruction, this was the first approach with tree rings in the Tropical Montane Cloud Forests in Serra do Mar, representing an important contribution for this study field. We also reinforce the need to improve climate research in these areas, in order to better understand the impact of global climate change local and regionally.

08 - Ilex microdonta Reissek (Aquifoliaceae) trees in high summits of Serra do Mar mountain range in southern Brazil: a first approach for climate reconstructions