Ecology

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Across
  1. 4. Final stage of succession in which organism populations are stable & balanced with each other and the environment
  2. 5. Bacteria converts nitrates in the soil into nitrogen gas
  3. 7. Succession that occurs in an area that was only partially destroyed by disturbances; starts with soil
  4. 10. Single pathway of energy transfer from one organism to another
  5. 11. Model that shows the flow of energy from one trophic level to the next
  6. 12. full Range of conditions in which an organism lives and the way in which the organism uses those conditions
  7. 13. Symbiotic relationship in which one organism benefits and the other is neither helped nor harmed
  8. 14. Living parts of the environment with which an organism might interact
  9. 18. Nonliving parts of the environment with which an organism might interact; shape an ecosystem
  10. 20. First species to populate an area during succession
  11. 21. All the organisms that live in a place, together with their nonliving environment
  12. 23. Interaction in which one organism captures and feeds on another
  13. 24. Largest number of individuals of a species that an environment can support
  14. 25. Many different populations of species living together in a defined area
Down
  1. 1. Each step or position an organism occupies in a food chain or food web
  2. 2. Converts nitrogen gas into nitrogen compounds that plants can absorb and use
  3. 3. Succession that occurs in an area in which no trace of a previous community is present; starts with rock
  4. 6. Network of interconnected energy pathways through an ecosystem
  5. 8. Process in which elements and other forms of matter are passed through the biotic and abiotic factors in an ecosystem
  6. 9. Limiting factor that affects all populations in similar ways regardless of population density (ex. natural disasters)
  7. 15. Symbiotic relationship in which both organisms benefit
  8. 16. Symbiotic relationship in which one organism benefits by living on or inside another organism and harms it
  9. 17. Single species that is not usually abundant in a community yet exerts strong control on the structure of a community
  10. 19. Limiting factor that depends on population density (ex. predation, competition, disease)
  11. 22. Group of similar organisms that can breed and produce fertile offspring