Across
- 6. Arrangement of a population in its environment
- 7. A large-scale dying out of a large percentage of all living organisms in an area within a short time
- 8. Movement of individuals away from a population
- 9. Environmental factor, such as predation, disease, and competition, that depends on the number of members in a population per unit area
- 10. In a biological community, the number and abundance of different species
- 12. Number of organisms per unit of living area
- 13. Overuse of species with economic value- a factor in species extinction
- 14. Largest number of individuals in a species that an environment can support long-term
- 17. Number of different species living in a specific area
- 19. effects Any different environmental condition occurring along an ecosystem's boundaries
- 20. Variety of inheritable characteristics or genes in an interbreeding population
- 21. Habitat loss from separation of an ecosystem into small pieces of land
- 22. Removal of part of a habitat
- 23. Any material or organism in the biosphere, including water, soil, fuel, and plants and animals
- 24. Environmental factor, such as storms and extreme heat or cold, that affects populations regardless of their density
Down
- 1. Movement of individuals into a population
- 2. When one species plays a large role in an ecosystem
- 3. The disappearance of a species when the last of its members dies
- 4. Variety of ecosystems in the biosphere
- 5. Gradual process of a species becoming extinct
- 11. Nonnative species that can significantly modify or disrupt habitat
- 15. Increasing concentration of toxic sub-stances, such as DDT, in organisms as trophic levels increase
- 16. How fast a specific population grows
- 18. Water pollution from nitrogen-rich and phosphorus-rich substances flowing into waterways, causing algal overgrowth