Across
- 4. biomes found in water
- 7. the process of gradual, natural change and species replacement in an ecosystem
- 9. tiny organisms that drift in the photic zone of aquatic biomes
- 11. the first species to live in a new area of land
- 12. just south of the tundra; a continuous tree line provides much of the earth's oxygen
- 13. type of succession that takes place on land where there are no living organisms
- 14. biome found only near the equator; warm temperatures and an abundance of rain provide lush plant growth
- 16. the ability of living things to survive the changes in their environment
- 17. biome with rich soil and grasses; known as breadbaskets
- 18. area where freshwater rivers meet saltwater ocean
- 19. treeless biome with long summer days and totally dark winters; permafrost is two meters below the surface
Down
- 1. a stable community that undergoes little change
- 2. part of the marine biome that is shallow enough for sunlight to penetrate
- 3. arid region with sparse plant life; the driest biome
- 5. group of abiotic factors that include humidity, temperature, amount of precipitation, etc.
- 6. zone of the shoreline between high and low tide lines
- 7. type of succession that happens after land has been disturbed but not destroyed
- 8. trees that lose their leaves in the winter in order to conserve water
- 10. any factor that affects an organisms ability to survive and the size of its population
- 15. biomes found on land