EXTREME DROUGHTS IN NORTHERN PATAGONIA AFFECT RESILIENCE IN AUSTROCEDRUS CHILENSIS FORESTS

AMOROSO, M.M.; SRUR A.M.; MARCOTTI, E.; VEGA, L.; MILAGROS RODRÍGUEZ-CATÓN; VILLALBA R.

San Francisco

Conferencia; AGU100 Fall Meeting; 2019

AGU

We sampled at 18 plots of living and dead trees (9 respectively) in mixed, compact and open forests (Fig. 1). For each forest, live and dead Basal Area Increment (BAI) chronologies were developed based on robust-mean estimates using dplR (Bunn et al. 2012) and temporal patterns were identified by using principal component analysis. We quantified the extreme droughts using 6 monthly precipitation (Table 1) and 1 CRUTS v4 temperature record (40.7 S and 71.2 W grid cell 0.5 x 0.5 lat-lon). Monthly moisture indices (MIs) were developed by subtracting the monthly temperature anomalies from the monthly precipitation anomalies: MI= Aist Pp?Aist T (Misi & Náfrádi 2017). Based on BAI before, during and after ten extreme droughts, we quantified resistance, recovery and resilience indices (Lloret et al. 2011).