Across
- 1. - Both benefit relationship
- 3. - Natural living area
- 7. - Makes own food
- 8. - Transition zone
- 14. - Pyramid or web
- 17. - Breaks down dead matter
- 19. - Non-living factors
- 21. - Eats plants and animals
- 22. - Close ecological interaction
- 23. - Community and its environment
- 25. - Environmental harm
- 27. - Group of the same species
- 29. - Eats other organisms
- 30. - Organism's role in ecosystem
Down
- 2. - Species reliance on each other
- 4. Level - Feeding position
- 5. - Crucial species
- 6. - Hunts for food
- 9. - Living factors
- 10. - Variety of life forms
- 11. - Toxin concentration increase
- 12. Chain - Energy transfer sequence
- 13. - Meat eater
- 15. - Harmful non-native species
- 16. - Ecosystem development stages
- 18. - Plant eater
- 20. - All populations together
- 24. - Study of interactions
- 26. - Large ecological region
- 28. - Hunted for food