Table 1.

Variables that may have directly controlled the parasitism rate in 2010

Variable	df	t statistics	P	r 2
Phylogenetic isolation	19	−3.48	2 × 10−3	0.39
Ectophagous Lepidoptera density	19	5.62	2 × 10−5	0.62
Insect herbivory	19	1.79	0.08	0.14
Budburst phenology	19	−3.32	3 × 10−3	0.36
Diversity of the surrounding canopy	19	−9 × 10−3	0.99	4 × 10−6
Distance to the closest oak tree	19	−0.91	0.37	0.04
Species richness of the surrounding canopy	19	−0.54	0.58	0.01

Simple regression analyses testing the effect of phylogenetic isolation, diversity of the surrounding canopy, distance to the closest oak, insect herbivore density, insect herbivory, and budburst phenology