@??31%D-? Sun Jul 15 10:10: SimUText Summer 2018 Section 5: Graded Questions Key

Question

@??31%D-? Sun Jul 15 10:10: SimUText Summer 2018 Section 5: Graded Questions Keystone Predator The diagrams below show very simplified species relationships for certain areas of African savanna. Recall what the direction of arrows means for each type of diagram. Then use these simplified diagrams to answer the next 3 questions. (Note: Real- world savannas support more species with more complex relationships.) Savanna Food Web Lions Cheetahs Elephants Zebra Gazelle Trees Shrubs Grasses Competition Among Savanna Plants Trees Shrubs Grasses Q5.6. If you removed all the Lions from a large area of savanna, which of the following is a DIRECT effect that could be explained by the diagrams?

Explanation / Answer

Answer:- In savanna food web diagram, direction of arrows show the feeding relationship between animals. For eg. Lions eat the gazelle and zebra while gazelles and zebras eat grasses.

In competition among savanna plants diagram, these arrows show the competition among grasses, shrubs and trees for space, water, and minerals etc.

Ans 5.6:- An increase in the Gazelle population size.

Explanation:- Because lions are predators on gazelles and eat them, if lions are removed then there is increase in gazelles population size, so gazelles population effected directly.

Ans 5.7:- An increase in Cheetah population size.

Explanation:- According to diagram, lions and cheetahs are competitors and they compete for same food. If lions are removed then there is no competitors for cheetahs, so they have more food to eat and in this way cheetahs population effected indirectly.

Ans 5.8:- Elephants

Explanation:- According to diagram, elephants consume grasses, shrubs and trees which are dominant competitors, so elephants help in maintaining diversity.

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