could you perhaps specify "wasps"? Vespa germanica, Trichogramma, Apanteles? gall wasps? All Hymenoptera? Specific natural enemies of forest pests? "Indifferent" species?All Europe? Thanks for trying again.
Oh, yes I mean common species like Vespa germanica but all hymenoptera are interesting for me. I didn't find any articles from Europe about abundance of wasps in forests. Maybe enough for me is answer on the question - Are the common species of wasps more abundant in beech, oak or spruce forests?