Ecological speciation describes how the interactions that organisms have with their environments may incidentally result in reproductive isolation and the formation of new species. Phytophagous (plant-eating) insects are among the best documented examples of ecological speciation, likely due to their intimate associations with plant hosts. He will describe some of his lab’s research into how the ecological speciation of phytophagous insects may “cascade” into other trophic levels, specifically their associated parasitoid wasp predators.