The community of a pond, for example, might include fishes, frogs, snails, microorganisms, and water lilies. The members of a community interact with one another in many different ways. Lily pads provide a resting place for frogs. Crayfish eat dead fish and frogs. Fish and snails eat lily pads.
Small fish eat microorganisms.
Microorganisms break down the bodies of dead organisms, producing products such as nitrogen compounds that can be used by plants.