Scientists knew that where there are many plant species, there are many types of vegetative insects, as each vegetative insect specializes in a plant.
Now, however, they have seen the same thing happening within the same plant species. Being of the same species, there is a difference between one plant and another, for example, in insect resistance. The comparison between sites with plants of the same genotype and plants of various genotypes has shown that in the second there are more species of insects and arthropods.