|Autotroph/Producer: | Chemoautotroph | Photoautotroph|
| Heterotroph/Consumer: | Primary Consumer | Secondary consumer | Tertiary consumer |
Herbivore | Carnivore | Omnivore | Decomposer
In a food web, Decomposers feed on dead organisms, and as their name indicates, decompose material. By breaking down existing organic matter nutrients are recycled. Decomposers include most bacteria, fungi, and detrivorous animals (although this latter can also be considered a different category).