Earthworms play a variety of roles in the ecosystem  They are both consumers and creators  They contribute to the material circulation and energy transmission of soil through feeding, digestion, excretion (earthworm dung), secretion (mucus) and burrowing  They can have an important impact on many processes of determining soil fertility  They are called ecosystem engineers and are also considered to be the first laborer on earth
All its activities in the soil are the transformation of the soil environment, and its life activities are essential in the small biological cycle of soil material
Cycle process of ecosystem