Ecology vocab crossword

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Across
  1. 2. interactions between organisms of two different species
  2. 6. consists of all the food chains in a single ecosystem.
  3. 8. the number of individuals per unit area or volume
  4. 12. introduction into the environment of a substance
  5. 13. an organism that helps hold the system together of any ecosystem
  6. 14. a resource that can be replenished naturally over time
  7. 16. cycle one of several natural cycles
  8. 19. measure of gauging human dependence on natural resources
  9. 20. close living relationship between organisms from different species
  10. 22. environment of an animal, plant, or other organism
  11. 23. environmental condition that limit the growth
  12. 25. organism that can produce their own food using energy from the environment
Down
  1. 1. a group of organisms that have a similar feeding mode
  2. 3. non-living factors that impact an ecosystem
  3. 4. The weight or total quantity of living organisms of one animal or
  4. 5. a graph showing the number
  5. 7. the study of the environment
  6. 9. a relationship between two organisms in which one organism benefits, and one is unaffected.
  7. 10. long-term ,predictable atmospheric conditions of a specific area
  8. 11. an organism that cannot produce its own food
  9. 15. the height is always the same.
  10. 17. the movement of organism into a new habitat
  11. 18. The action of coming to live permanently in a foreign country
  12. 21. resilient species that are the first to colonize barren environments
  13. 24. a group of people living in the same place