An ecosystem is an area containing a self-substained community of organisms living in non-living surroundings, e.g. a pond or a wood.
Within an ecosystem there are...
- Autotrophs (self-feeders) for example, plants that make their own food. They are also known as producers.
- Heterotrophs, fopr example, animals and decay organisms that are unable to make their own food so they get their energy by consuming other organisms.
Heterotrophs that eat plants are called herbivores. They are primary consumers. Heterotrophs that eat other animals are called carnivores.They aresecondary or tertinary consumers.