Across
- 4. harmful materials released onto Earth
- 6. Succession, predictable changes after disturbances
- 8. Species, key organism that helps maintain an ecosystem
- 11. Zone, no light and no photosynthesis
- 12. created from plants and fungi
- 14. Warming, long term changes in temperatures
- 16. clearing forests
- 17. Species, 1st to inhabit an ecosystem
- 18. Zone, light penetrates and photosynthesis occurs
- 20. Community, mature ecosystem
- 21. measurement of richness, evenness, and endemic species
Down
- 1. Web, visual representation of feeding interactions
- 2. Exclusion Principle, no two organisms can occupy the same niche at the same time
- 3. succession, predictable changes in an ecosystem
- 5. populations are too high
- 7. Vents, pocket ecosystems at bottom of ocean
- 9. Biome, water ecosystem
- 10. Biome, land ecosystem
- 13. Species, non-native species in a community
- 15. collection of ecosystems characterized by similar temperatures, rainfall amounts, and climax communities
- 19. where fresh and salt water meet