Ecology 16 19 20 quizzes

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Ecology 16 19 20 quizzes
2012-12-03 17:06:02
Ecology 16 19 20 quizzes

Ecology 16 19 20 quizzes
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  1. The studies by Chapin and colleagues on Glacier Bay succession provide empirical support for which of the following models of succession?Answer    
    Facilitation, tolerance, inhibition
  2. Which of the following human activities can bring about shifts in communities to alternative stable states?
    Habitat destruction, introduction of invasive species, overexploitation of native species
  3. The final theoretical stage of succession is called the _______ stage.
  4. An example of a biotic factor that can be an agent of change is
  5. In which of the following models of succession can animals be important drivers of succession?
    • Inhibition
    • Tolerance
    • Facilitation
  6. Which of the following statements regarding early primary succession is true
    process is slow, first colonists can withstand much physiological stress, first colonists typically face hostile conditions
  7. Which of the following early ecologists maintained that plant communities were analogous to superorganisms ?
    Fredrick Clements
  8. A nutrient-poor lake with low primary productivity is referred to as
  9. The increased productivity that occurs as a lake becomes shallower and warmer and more decomposition occurs is known as
  10. Nitrogen from detritus is made available for absorption by plants through the process of
  11. Which of the following correctly describes the role of nitrogen fixation in the nutrient cycle?
    N2 is taken up by certain bacteria that can change it into ammonium, a form that is usable by plants.
  12. The study of the chemical, physical, and biological factors that influence the movements and transformations of elements is called
  13. By a process known as _______, certain chemoautotrophic bacteria transform ammonia and ammonium into _______, which tends to be more available to plants than other forms of nitrogen.
    nitrification; nitrate
  14. On average, the typical ________ must consume more food per body mass than the typical _______, in part because of the difference in the C:N ratio between plants and animals.
    herbivore; carnivore
  15. How do plants differ from animals with respect to the way in which they acquire nutrients?
    Plants take up simple chemicals, which they synthesize into larger molecules; animals take up larger, more complex molecules.