Across
- 3. species – first to grow
- 4. species – species with big impact
- 8. – too many individuals
- 11. – sunlight zone
- 12. – cutting down forests
- 14. warming – rising Earth temperature
- 15. succession – regrowth after disturbance
- 16. succession – growth on bare rock
- 18. – no sunlight zone
- 20. species – native to one place
- 21. biome – water-based ecosystem
Down
- 1. – fungus + algae partnership
- 2. biome – land-based ecosystem
- 5. species – harmful non-native species
- 6. vents – hot ocean floor vents
- 7. – variety of life
- 9. – where river meets ocean
- 10. – large ecosystem region
- 13. web – connected food chains
- 16. – harmful environmental waste
- 17. exclusion principle – one species outcompetes another
- 19. community – stable final ecosystem