Across
- 2. relating to light
- 5. first organism that occupies an ecosystem
- 7. where the tide meets the stream
- 11. forest being destroyed and cut down
- 14. non native species that harms the environment
- 16. an organism that has too many of it
- 18. with light
- 19. species that ecosystem relies on
- 20. first species to arrive in primary succession
Down
- 1. this harms the environment
- 3. no two species can occupy the same niche
- 4. multiple food chains linked together
- 6. large area where organisms live
- 8. without light
- 9. the earth getting warmer from pollution
- 10. puts out heat from the ocean
- 12. species only found in one place
- 13. variation in a community of organisms
- 15. succession that occurs from no life or soils
- 17. succession that occurs from previous soil and/or life