Summary:
- An ecosystem is a group of living things and their environment.
- The word ecosystem is short for “ecological system.” An ecosystem can be big or small, underwater or coastal, small or large.
- All the members of a species that live in the same area form a population.
- Many different species live together in an ecosystem.
- All their populations make up a community.
- A community is made up of all of the populations in an area.
- A habitat is where an organism lives, and a niche is what it does to make a living.