An ecosystem is an ecological system - the interactions of plants, animals and other organisms with non-biological environmental factors in a certain areas. Rainforests, grasslands and deserts are examples of specific types of ecosystems which feature animals and plants specifically adapted to live within the environmental constrains of the system.

The Armada was a series of agricultral domes which maintained an ecosystem, introducing birds and insects to regulate infestation rather than using artificial pesticides. (TNG comic: "Space Seeds")

