Across
- 6. way in which individuals of a population are spread out over an area or volume survivorshipcurve graph showing the surviving members of each age group of a population over time
- 8. movement of individuals out of a population
- 11. theory that states that no two species can occupy the same niche at the same time
- 13. air pollution in which gases released from burning fossil fuels form a fog when they react with a sunlight
- 14. dramatic decline in the size of a population over a short period of time
- 15. all of the physical, chemical, and biological factors that a species needs to survive, stay healthy and reproduce in an ecosystem
- 17. population growth that is characterized by a period of slow growth, followed by a period of exponential growth , followed by a period of no growth
- 18. environmental resistance that affects a population that becomes overly crowded
- 19. combined biotic and abiotic factors found in an area where organisms live
- 20. dramatic increase in population over a short period of time
Down
- 1. organisms that share a similar niche but live in different geographical regions
- 2. reestablishment of a damaged ecosystem in an are where the soil was left intact
- 3. number of individuals that the resources of an environment can normally and persistently support
- 4. organism that is the first to live in a previously uninhabited area
- 5. environmental resistance that affects a population regardless of population density
- 7. establishment and development of an ecosystem in an area that was previously uninhabited.
- 9. movement of individuals into a population
- 10. measure of individuals living in a defined are
- 12. environmental factor that limits the growth and size of a population
- 16. Sequence of biotic changes that regenerate a damaged community or start a community in a previously uninhabited area.