Responses of predatory invertebrates to seeding density and plant species richness in experimental tallgrass prairie restorations

•High plant richness does not ensure high invertebrate abundance or diversity.•High seeding density does not ensure high invertebrate abundance or diversity, Plant richness had a positive effect on ladybird beetle abundance.•Seeding density had a positive effect on ground beetle richness diversity.•Seeding density had a positive effect on spider richness and diversity.