Across
- 2. A system formed by the interaction of organisms with their environment
- 4. Brought into a new environment by humans
- 5. Not naturally occurring in the environment
- 9. An aggressive establishment of a species
- 10. To expand or disperse widely
- 12. the natural environment where organisms live
- 13. An organism that establishes dominance in a new habitat
Down
- 1. The variety of life in the world or a particular habitat
- 3. A species not originating in the area
- 6. To surpass in competition for resources
- 7. Unfamiliar or foreign species
- 8. Causing disruption to the local ecosystem
- 11. belonging to a specific environment originally