Variable

Detailed explanation of the variables

Tree_ID

Identity given to each oak

Partner_ID

Identity given to each scientific and school partner

Partner type

Type of partner as there were scientific partners and also school partners

Country

Country where the oak was sampled

Latitude and Longitude

Coordinates of the oak sampled

Installation

Date where plasticine caterpillars were installed

Survey

The survey when plasticine caterpillars were checked for predation activity

Removal

Date when caterpillars were removed from the oak

Caterpillars attacked by birds

Number of caterpillars that were attacked by birds in each survey

Caterpillars installed

Total number of caterpillars installed in each oak in each survey

Leaf damage

The percentage of leaf area that was consumed

 or mined by insect herbivores (averaged leaf damage at the oak level)

Incidence of leaf-miners

The proportion of leaves with leaf-mines

Incidence of gall-inducers

The proportion of leaves with galls

Miners.1

Number of leaves with mines

Miners.0

Number of leaves without mines

Galls.1

Number of leaves with galls

Galls.0

Number of leaves without galls

Year

Year when oak was sampled

Spring temperature (amj)

The mean temperature from April to June

Spring Precipitation (amj)

The mean precipitation from April to June

Circumference of the tree

Circunference of the oak at 1.30m

Bird predation

Ratio of % attacked caterpillars on exposition period

Lignin (mg g⁻¹ )

Condensed tannins (mg g⁻¹ )

Hydrolysable tannins (mg g⁻¹ )

Flavonoids (mg g⁻¹ )

Leaf traits including leaf phenolics and nutritional traits

Soluble sugar (g L⁻¹)

Cellulose (g)

N:P ratio

C:N ratio