List of variables measured and presented in the manuscript "Effects of climate on leaf phenolics, insect herbivory, and their relationship in pedunculate oak (Quercus robur) across its geographic range in Europe"

The dataset consists on the variables that resulted of the combination of field observations and feeding trials in controlled environments to investigate the effect of climate on chemical defences and insect herbivory in pedunculate oak (Quercus robur L.) throughout most of its geographic range in Europe, while controlling for physical defences. We measured herbivory and quantified secondary metabolites (phenolics) in 168 pedunculate oaks distributed across its European geographic range. We fed spongy moth larvae (Lymantria dispar L.) with a semi-artificial diet incorporating grounded leaves from the same oaks to isolate chemical traits from physical traits. We measured a total of 18 variables (Site_ID; Year_sampling; Latitude and Longitude; MAT; MAP; Flavonoids (mg g⁻¹ ); Lignin (mg g⁻¹ ); Condensed tannins (mg g⁻¹ ); Hydrolysable tannins (mg g⁻¹ ); Total phenolics; Phenolic compound richness (S); Shannon's diverisry index (H); Hydrolysable tannins (mg g⁻¹ ); Herbivory_site; Replicate; Weight_i; Weight_f and RGR).