Across
- 2. - populations influence each others evolution over a long period of time.
- 3. succession - a new environment is created from bare rocks.
- 4. species - organisms that are especially important to an ecosystem.
- 7. community - a stable environment. Little to no change occurring.
- 9. succession - a new environment is created after an old environment.
Down
- 1. - vegetation
- 3. zone - light can penetrate.
- 5. species - first organism in an environment.
- 6. - animals
- 8. zone - photosynthesis can no longer take place.