Common Names: common milkweed
This study investigated whether host plant specialization affects the diversity and composition of bacterial communities within milkweed aphids. Despite overlap in taxa detected across all three aphid species, structural differences were identified within communities. Bacterial community diversity did not vary with degree of aphid host plant specialization, but the narrow specialist A. asclepiadis had significantly higher relative abundances of the facultative symbiont Arsenophonus compared to the other two aphid species. This study highlights how low abundance microbes can have important ecological effects in shaping microbiomes within herbivore species.