BIO CHAP 27

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Author:
ndumas2
ID:
161179
Filename:
BIO CHAP 27
Updated:
2012-07-05 22:51:29
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BIOLOGY
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Terms from chap 7
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  1. the evolution of a predatory organism to resemble a harmless animal or a part of the environment, thus gaining access to prey.
    aggressive mimicry
  2. a terrestrial ecosystem that occupies an extensive geographic area and is characterized by a specific type of plant community; for example, deserts.
    biome
  3. living
    biotic
  4. coloration and/or shape that renders an organism inconspicuous in its environment.
    camouflage
  5. literally, "meat eater"; a predatory organism that feeds on herbivores or on other carnivores; a secondary (or higher) consumer.
    carnivore
  6. a diverse and relatively stable community that forms the endpoint of succession.
    climax community
  7. the evolution of adaptations in two species due to their extensive interactions with one another, such that each species acts as a major force of natural selection on the other.
    coevolution
  8. all the interacting populations within an ecosystem.
    community
  9. interaction among individuals who attempt to utilize a resource (for example, food or space) that is limited relative to the demand for that resource.
    competition
  10. competitive exclusion principle
  11. any event that disrupts an ecosystem by altering its community, its abiotic structure, or both; disturbance precedes succession.
    disturbance
  12. the role of a particular species within an ecosystem, including all aspects of its interaction with the living and nonliving environments.
    ecological niche (nitch)
  13. literally, "plant-eater"; an organism that feeds directly and exclusively on producers; a primary consumer.
    herbivore
  14. the prey organism on or in which a parasite lives; the host is harmed by the relationship.
    host
  15. competition among individuals of different species.
    interspecific competition
  16. an area of the ocean shore that is alternately covered and uncovered by the tides.
    intertidal zone
  17. competition among individuals of the same species.
    intraspecific competition
  18. organisms that are introduced (deliberately or accidentally) into ecosystems where they did not evolve, and where they encounter little environmental resistance and tend to displace native species.
    invasive species
  19. a species whose influence on community structure is greater than its abundance would suggest.
    keystone species
  20. the situation in which a species has evolved to resemble something else, typically another type of organism.
    mimicry
  21. a symbiotic relationship in which both participating species benefit.
    mutualism
  22. an organism that lives in or on a larger organism (its host), harming the host but usually not killing it immediately.
    parasite
  23. an organism that is among the first to colonize an unoccupied habitat in the first stages of succession.
    pioneer
  24. an organism that eats other organisms.
    predator
  25. succession that occurs in an environment, such as bare rock, in which no trace of a previous community is present.
    primary succession
  26. the coexistence of two species with similar requirements, each occupying a smaller niche than either would if it were by itself; a means of minimizing the species’ competitive interactions.
    resource partitioning
  27. succession that occurs after an existing community is disturbed—for example, after a forest fire; secondary succession is much more rapid than primary succession.
    secondary succession
  28. a form of mimicry in which a color pattern (in many cases resembling large eyes) can be displayed suddenly by a prey organism when approached by a predator.
    startle coloration
  29. a community in which succession is stopped before the climax community is reached; it is maintained by regular disturbance—for example, a tallgrass prairie maintained by periodic fires.
    subclimax
  30. a structural change in a community and its nonliving environment over time. During succession, species replace one another in a somewhat predictable manner until a stable, self-sustaining climax community is reached.
    succession
  31. bright coloration that warns predators that the potential prey is distasteful or even poisonous.
    warning coloration

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