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1 | |
The process of breaking atmospheric (molecular) nitrogen in half is called: |
| | A) | laxation |
| | B) | denitrification |
| | C) | sequestration |
| | D) | fixation |
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2 | |
Ocean sediments are sinks for: |
| | A) | carbon |
| | B) | phosphorus |
| | C) | nitrogen |
| | D) | all of the above |
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3 | |
A key ecosystem process is: |
| | A) | mineralization during decomposition |
| | B) | decomposition, mineralization, deposition |
| | C) | precipitation during sclerophylly |
| | D) | lignitization during precipitation |
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4 | |
Because of the factors involved in decomposition, one can predict that rates are: |
| | A) | higher in desert ecosystems |
| | B) | higher in tropical ecosystems |
| | C) | higher in tundra ecosystems |
| | D) | relatively constant across ecosystems, but for different reasons |
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5 | |
Fynbos is: |
| | A) | a genus of isopod, used to fix nitrogen |
| | B) | an example of an ecologist turned policy-strategist |
| | C) | the residual, uncrystallized material as plants absorb lignite |
| | D) | a diverse ecosystem type |
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6 | |
An ecologist noted for work on large-scale biogeochemical cycling is: |
| | A) | MacArthur |
| | B) | Paine |
| | C) | Vitousek |
| | D) | Fynbos |
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7 | |
True or False:
Because of the modifications to the physical environment, it is likely that pocket gophers can be considered keystone species, in addition to their roles as nutrient cyclers. |
| | A) | True |
| | B) | False |
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8 | |
True or False:
Because of ecosystem complexity, it is unlikely that changing the availability of one nutrient such as nitrogen, will have much effect on terrestrial or aquatic systems. |
| | A) | True |
| | B) | False |
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9 | |
True or False:
A short spiraling length indicates rapid nutrient exchange. |
| | A) | True |
| | B) | False |
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10 | |
True or False:
Ecologists who study phophorus cycles have highlighted the importance of atmospheric sources to ecosystem functioning. |
| | A) | True |
| | B) | False |
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2002 McGraw-Hill Higher Education