Table 1.

A summary of species richness and functional diversity for each of the functional groups, along with the traits used to calculate functional diversity

Functional group	Species richness	Functional diversity	Traits	Type/unit of measurement	Collection source
Decomposer	Total: 359 Mean: 23 Max: 52 Min: 4	Mean:0.20 Max:0.27 Min:0.02	Body length	Continuous: mm	Literature
			Polypore visitor	Binomial	Literature
			Wood diameter preference	Continuous: developed by Gossner et al. (2013)	Literature
			Decay preference	Continuous: developed by Gossner et al. (2013)	Literature
Predator	Total: 284 Mean: 15.8 Max: 39 Min: 1	Mean:0.08 Max:0.14 Min:0.03	Body length	Continuous: mm	Literature
			Eye size	Continuous: eye size divide by length	Photogrammetric analysis
			Peak activity date	Continuous: year days	Literature and predictions from GBIF data
Flower visitor	Total: 85 Mean: 6.1 Max: 25 Min: 1	Mean: 0.13 Max: 0.25 Min: 0.02	Body length	Continuous: mm	Literature
			Body shape	Continuous: width at widest place divide by length	Photogrammetric analysis
			Peak activity date	Continuous: year days	Literature and predictions from GBIF data

Functional dispersion was used as a measure of functional diversity and was calculated from different traits within each of the functional groups. Important effect traits related to the respective ecosystem function were identified based on previous studies and protocols for selecting insect functional traits. Species richness and functional diversity were calculated for each veteran oak for every year of sampling (N = 202, 61 trees sampled intermittently from 2004 to 2011).