Ecosystem is a system where living and non-living things interact in one place. It includes plants, animals, microorganisms, water, air, and soil. Ecosystems can be found in many environments.

A forest, a coral reef, a desert, or even a small pond can be an ecosystem. Some are tiny, like a puddle with insects and algae, while others are huge, like the Amazon rainforest. Living parts include producers such as plants, consumers like animals, and decomposers such as fungi and bacteria.

Ecosystems exist on land and in water across Earth. They are studied in biology and environmental science as connected systems.