1. | Unicellular organisms | ....................... | ....................... |
2. | Biotic components | ....................... | ....................... |
3. | Primary consumers | ....................... | ....................... |
4. | Scavengers | ....................... | ....................... |
5. | Decomposers | ....................... | ....................... |
6. | Abiotic components | ....................... | ....................... |