Why are caddisflies important in freshwater food webs?

Caddisflies are vital components of freshwater food webs due to their roles as both consumers and a primary food source for other organisms.12

As larvae, most caddisflies feed on aquatic plants, algae, diatoms, or plant debris, while some are predatory or omnivorous. By consuming this material, they help regulate plant growth and assist in the decomposition of organic matter, effectively transforming plant material into energy that supports higher trophic levels.23

Caddisflies are also a critical food source for a wide variety of animals. Their larvae and swimming pupae are consumed by fish, such as trout and eels. Once they emerge as adults, they are preyed upon by birds, lizards, frogs, spiders, dragonflies, and bats. Because they are so essential to the diets of fish, they are frequently used as models for artificial flies in fly-fishing.123

Beyond their role in food webs, caddisflies serve as important biomonitoring indicators, as their presence and diversity help scientists assess the health and pollution levels of freshwater ecosystems.23