Ecosystems An ecosystem is an area where all the living and non-living things interact with and depend on each other. Everything in the natural world is connected. An ecosystem is a community of living and non-living things that work together.
Ecosystems have no particular size.
An ecosystem can be as large as a desert or a lake or as small as a tree or a puddle. If you have a terrarium, that is an artificial ecosystem. The water, water temperature, plants, animals, air, light, and soil all work together. If their isn't enough light, or water or if the soil doesn't have the right nutrients, the plants will die. If the plants die, animals that depend on them will die.