Question 1

In an aquatic ecosystem,a secondary carnivore is temporarily excluded and then,after a period of time,is returned.Which one of the following is NOT an expected top-down effect after it is returned?

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Question 2

Which of the following observations were an outcome of studies by David Tilman and coworkers at Cedar Creek,Minnesota on ecosystem stability? Check all that apply.

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The answer of Which of the following observations were an...

Question 3

Which of the following are true statements about the carbon cycle? Check all that apply.

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The answer of Which of the following are true statements...

Question 4

Phosphorus deficiency often appears early in plant growth and results in stunting.Which of the following are reasons why a deficiency in phosphorus would cause growth abnormalities in plants? (Check all that apply.)

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Question 5

Which one of the following statements about the trophic cascade in the sea otter and sea urchin-kelp communities along the West Coast of North America are true? Check all that apply.

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Question 6

Which of the following hypotheses support the basic principle of the species-area relationship? Check all that apply.

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Question 7

The tropics are known to have greater species diversity than the temperate zones.Which explanation for this phenomenon is the LEAST convincing?

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Question 8

According to MacArthur and Wilson's island biogeography theory,which of the following would be expected to have the smallest species richness?

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Quiz 56: Dynamics of Ecosystems