Isopods exhibit diverse feeding habits, largely dictated by their environment and species. They are not picky eaters; instead, they can be classified as detritivores, herbivores, carnivores, or even parasites. Their diet consists of decaying organic matter, algae, small insects, and, in some cases, living plants or animals. An example is the common pill bug, which primarily consumes decaying leaves and wood.
Understanding the food sources of isopods is important for comprehending their ecological roles. As detritivores, they contribute significantly to decomposition and nutrient cycling in terrestrial and aquatic ecosystems. This activity promotes soil health and supports plant growth, while their consumption of algae helps regulate algal blooms. The dietary habits of parasitic species impact the health and survival of their hosts, affecting the dynamics of various populations.