Species richness is
Question 2
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Which of the following are examples of symbiosis? Select all that apply.
Question 3
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In Africa, grasses are the main vegetation in savanna communities. Acacias and other trees are few and widely scattered. Elephants range over very large territories and are not very abundant in any one location. However, they strongly affect the community by uprooting and consuming trees and shrubs, maintaining suitable habitat for grasses and grassland animals. Many species of birds and insects live in the savanna grasses. Based on this information, which of the species or groups above would best be described as keystone species?
Question 4
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The effect of wolves on the survival and growth of young trees along rivers in Yellowstone National Park is a good example of…
Question 5
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Occasionally American alligators are sighted in rivers or lakes in New York City, far north of their usual range. These alligators are usually escaped pets. There is no self-sustaining population of alligators in New York, and they have no important influence on other populations there. Is the American alligator a member of the ecological community in New York?
Question 6
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Which of the following is an indirect interspecific interaction?
Question 7
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Which of the following would probably have a greater richness of native plant species per acre?
Question 8
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In Africa, grasses are the main vegetation in savanna communities. Acacias and other trees are few and widely scattered. Elephants range over very large territories and are not very abundant in any one location. However, they strongly affect the community by uprooting and consuming trees and shrubs, maintaining suitable habitat for grasses and grassland animals. Many species of birds and insects live in the savanna grasses. Which of the species or groups above would best be described as foundation species?
Question 9
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Which of the following is a direct interspecific interaction?
Question 10
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Which of the following is known to be a keystone species in the kelp forest ecosystem?
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