Across
- 3. Non native species that harm ecosystems
- 4. Area where freshwater mixes with saltwater
- 8. Network of interconnected food chains
- 9. Variety of living organisms in an area
- 11. biomes Water based ecosystems
- 12. Area of water with no sunlight
- 14. Large region with specific climate plants and animals
- 16. Openings in ocean floor releasing hot water
- 19. Species found only in one location
- 20. Area of water where sunlight reaches
- 21. Stable mature ecosystem after succession
- 22. Partnership between fungus and algae or bacteria
Down
- 1. Species with major impact on ecosystem
- 2. Succession starting with no soil
- 5. Land based ecosystem
- 6. Succession where soil already exists
- 7. Two species cannot share the same niche long term
- 10. First species to colonize an area
- 13. Harmful substances in the environment
- 15. Too many individuals for environment to support
- 17. Clearing or removal of forests
- 18. Increase in Earths average temperature