Across
- 6. Ecological rule that states that no two species can occupy the same exact niche in the same habitat at the same time
- 8. A geographic region categorized by a particular combination of average annual temperature, annual precipitation, and distinctive plant growth forms on land
- 9. A species that influences the survival of many other species in an ecosystem
- 11. the variety of life in the world or in a particular habitat or ecosystem.
- 12. pocket ecosystems at the bottom of the ocean near divergent plate boundaries
- 15. plants and animals that have migrated to places where they are not native
- 16. A stable, mature community that undergoes little or no change in species over time
- 17. succession that occurs on surfaces where no soil exists
- 19. First species to populate an area during primary succession
- 21. Destruction of forests
- 22. An increase in the average temperature of the earth's atmosphere (especially a sustained increase that causes climatic changes)
Down
- 1. The effect of humans on an ecosystem
- 2. species that are native to and found only within a limited area
- 3. permanently dark layer of the oceans below the photic zone
- 4. Portion of the marine biome that is shallow enough for sunlight to penetrate.
- 5. symbiotic association between a fungus and a photosynthetic organism
- 7. reestablishment of a damaged ecosystem in an area where the soil was left intact
- 10. A community of organisms where there are several interrelated food chains
- 13. A group of ecosystems that share similar climates and typical organisms
- 14. largest biome, most stable with little variation in temperature, provides most of earth's food and oxygen, divided into regions based on amount of light they receive
- 18. A habitat in which the fresh water of a river meets the salt water of the ocean.
- 20. A biological community of interacting organisms and their physical environment.