Population Ecology Graph Quiz

Which of these is an example of an R- Selected Species?

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Which factor would be considered density independent?

• intestinal parasites

• a fatal virus

• an earthquake

• severe overcrowding

Which factor would be considered density dependent?

• competition for food

• forest fire

• water quality

• pH of the soil

Which population growth model does this graph illustrate?

• exponential growth

• lag phase

• logistic growth

• straight-line growth

What is the horizontal line on the graph called?

• exponential growth

• geometric growth

• carrying capacity

• straight-line growth

Where does the Moose/Wolf study take place?

• Isle Royale National Park

• Disney World

• A Wild Animal Safari in Africa

• West Wetlands Park Yuma

Any circumstance that decreases the growth or size of a population is known as ______________.

• a growth factor

• death rate

• a limiting factor

• the growth rate.

Study the graph provided. What is the most likely cause of the decrease in the moose population immediately after 1995?

• Poisonous plants killed off many moose.

• Many moose reached old age and died.

• Not having enough to eat caused competition in the moose population.

• A decrease in predators caused an increase in the moose population.

Which of the following is a density-independent limiting factor?

• competition for food

• predator/prey relationships

• a forest fire

• parasitism and disease

What is the approximate carrying capacity of the deer population on Walla Walla Island?

• 100

• 60

• 80

• 15