BIO Chapter 34

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Anonymous
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104558
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BIO Chapter 34
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2011-09-26 21:58:35
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BIO Chapter 34
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Vocab. and Q's
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  1. ecological community
    is all the populations of all species that inhabit a given area.
  2. ecological dominants
    are the few dominant species in a community.
  3. keystone species
    in a species whose absence from a community would bring about significant change in that community.
  4. what are the primary forms of biodiversity?
    • - a diversity of species in a given area.
    • - a geographical distribution of species populations.
    • - genetic diversity within species populations.
  5. habitat
    the physical surroundings where the organisms are found.
  6. niche
    the role of the organism in the environment.
  7. what are the five interactions?
    • - predation
    • - competition
    • - parasitism
    • - mutualism
    • - commensalism
  8. predation
    when one organism feed on parts or all of a second organism.
  9. mimicry (form of camouflage)
    when one species evolved to assume the apperance of another.
  10. parasitism
    an interaction in which an individual from one species benefits while an individual from another species is harmed. (parasite vs. host)
  11. mutualism
    an interaction in which an individual from one species benefits while an individual from another species is neither harmed nor helped.
  12. symbiotic
    close relationships between organisms. (parasitism, mutualism, commensalism)
  13. community succession
    a series of replacements of community members at a given location until a relatively stable final state is reached.
  14. primary succession
    • starts from an area of little or no life and soil that lacks nutrients.
    • ex: pioneer plants
    • - lichen (algae and fungus)
  15. secondary succession
    • happens when the final state of habitat is first disturbed by some outside force, but life remains, and the soil has nutrients.
    • ex: Mt. St. Helons
  16. what is the end result of succession known as?
    climax community

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