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Biology 4 2
Biology 4 2
Biology 4 2
Biology 4 2
Biology 4 2
Biology 4 2
Biology 4 2
Biology 4 2
Biology 4 2
Biology 4 2
Biology 4 2
Biology 4 2
Biology 4 2
Biology 4 2
Biology 4 2
Biology 4 2
Biology 4 2
Biology 4 2
Biology 4 2
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Biology 4 2

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Transcript

  • 1. What shapes an Ecosystem? 4.2
  • 2. Biotic Factor
    Biological influence on organisms within an ecosystem.
  • 3. Abiotic Factor
    Physical, or nonliving, factor that shapes an ecosystem.
  • 4. Habitat
    The area where an organism lives, including the biotic and abiotic factors that affect it.
  • 5. Niche
    Full range of physical and biological conditions in which an organism lives and the way in which the organism uses those conditions.
  • 6. Resource
    Any necessity of life, such as water, nutrients, light, food, or shape.
  • 7. Competitive exclusion principle
    Ecological rule that states that no two species can occupy the same exact niche in the same habitat at the same time.
  • 8. Predation
    Interaction in which one organism captures and feeds on another organism.
  • 9. Symbiosis
    Relationship in which two species live closely together.
  • 10. Mutualism
    Symbiotic relationship in which both species benefit from the relationship.
  • 11. Commensalism
    Symbiotic relationship in which one member of the association benefits and the other is neither helped nor harmed.
  • 12. Parasitism
    Symbiotic relationship in which one organism lives in or on another organism and consequently harms it.
  • 13. Ecological Succession
    Gradual change in living communities that follows a disturbance.
  • 14. Primary Succession
    Successionthat occurs on surfaces where no soil exists.
  • 15. Pioneer Species
    First species to populate an area during primary succession.
  • 16. Secondary Succession
    Succession following a disturbance that destroys a community without destroying the soil.
  • 17. Key Concept
    How do biotic and abiotic factors influence an ecosystem?
    Together, biotic and abiotic factors determine the survival and growth of an organism and the productivity of the ecosystem in which the organism lives.
  • 18. Key Concept
    What interactions occur within communities?
    Community interactions, such as competition, predation, and various forms of symbiosis, can powerfully affect an ecosystem.
  • 19. Key Concept
    What is ecological succession?
    Gradual change in living communities that follows a disturbance.

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