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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
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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
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The final theoretical stage of succession is called the _______ stage.
climax
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An example of a biotic factor that can be an agent of change is
competition.
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In which of the following models of succession can animals be important drivers of succession?
- Inhibition
- Tolerance
- Facilitation
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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
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Which of the following early ecologists maintained that plant communities were analogous to superorganisms ?
Fredrick Clements
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A nutrient-poor lake with low primary productivity is referred to as
oligotrophic.
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The increased productivity that occurs as a lake becomes shallower and warmer and more decomposition occurs is known as
eutrophication.
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Nitrogen from detritus is made available for absorption by plants through the process of
decomposition
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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.
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The study of the chemical, physical, and biological factors that influence the movements and transformations of elements is called
biogeochemistry.
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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
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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
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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.
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