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The Ecosystem : Question 3
Name: Class:
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The Lynx is a member of the cat family of animals found in North America. It is a carnivore and its prey includes the snowshoe hare. The following graph shows the population of lynx and snowshoe hares in North America from 1860 to 1940.

North American Lynx

Lynx - Snowshoe hare Graph

Answer the following questions:

(a) Is there any relationship between the number of lynx and the number of snowshoe hares? Give a reason for your answer.

 

 

 

    

 

 

(b) Can you think of any reason why the numbers of both animals should vary so much over the ninety year period?

 

 

 

 

 

   

 

(c) Why do you think the numbers of lynx have declined, on average, since the turn of the 20th century?

 

 

 

  

 

 

 

(d) How has this decline in the lynx population affected the snowshoe hare population?