Table 1.

Description of the damage treatments performed in 2012 and 2013 [more details about stress treatments in Ramirez (2017)]. For Fraxinus, we used six trees per treatment on average, with the exception of nine for the maximum damage treatment group, while Celtis on average had four trees per treatment and eight for the maximum damage treatment group.

Treatment		Method	Intensity
DEFOLIATION	(DF)	Manual removal of leaves at the base of the petiole for all branches	High = 75% Low = 37% Control = no treatment
ROOT REDUCTION	(RR)	Tree spade machine cutting at 30-cm radius from stem base	High = 75% Low = 37% Control = no treatment
STEM DAMAGE	(SD)	40-mm-wide strip removal, 30 cm above root base. Only cambium and phloem connection were removed	Damage 50% Control = no treatment