Wolves of Yellowstone

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Across
  1. 2. When predators increase, the elk population may decrease
  2. 4. When animals fight over space
  3. 7. An organism that is hunted and eaten
  4. 8. An animal that eats both plants and animals
  5. 9. The number of individuals in a given area
  6. 12. The natural home of an organism
  7. 13. A change in population size over time
  8. 14. A species that has a very large impact on its ecosystem
  9. 16. When elk eat too many plants
  10. 17. Animals were reintroduced to Yellowstone to help restore balance
  11. 18. Plants are examples of this trophic level
  12. 19. The balance of an ecosystem
Down
  1. 1. Plants and trees in an ecosystem
  2. 3. If predators are removed, prey populations may increase
  3. 5. Different species fighting for the same limited resource
  4. 6. An animal that eats plants
  5. 7. A relationship where one organism hunts and eats another
  6. 10. When a species disappears completely
  7. 11. An organism that hunts other organisms for food
  8. 15. A group of the same species living in one area