Do aphids eat quaking aspens

Yes, aphids [of the Aphidoidea subfamily] feed on quaking aspens [Populus tremuloides]. The tree isn't a particularly long lived variety. It tends to live about 20 years. But that short life may become even shorter due to the variety of predators that are attracted to the tree's luscious leaves.

Among those predators are different kinds of aphids, such as the spotted poplar aphid [Aphis maculatae], the speckled poplar aphid [Chaitophorus populicola], the poplar vagabond aphid [Mordvilkoja vagabunda], and the poplar petiole gall and twig gall aphids [Pernphigus spp]. Aphids suck the chlorophyll containing fluids out of the leaves. At the same time, they secrete a sweet honeydew that attracts even more predators to the already highly stressed tree.