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Density-Independent Limiting Factors in Populations

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Density-Independent Limiting Factors in Populations

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Questions and Answers

What is a density-independent limiting factor?

Diseases that spread more easily in dense populations

Environmental changes that are influenced by population size

Natural disasters such as droughts and floods (correct)

Factors that only affect populations with high density

How do populations typically respond to 'crash' caused by density-independent factors?

They always stay at a very low population size

They never recover and face extinction

They may quickly build up again (correct)

They show no change in population size

Which of the following can devastate coral reefs according to the text?

Heatwaves

Heavy rainstorms

Hurricanes and their waves (correct)

Aphids

What effect can long-term droughts have on population sizes?

They cause severe declines in populations Signup and view all the answers

In what way did the moose population respond after the wolf population crashed on Isle Royale?

It grew exponentially for a time Signup and view all the answers

What was the main reason many moose died from starvation on the island?

Intense cold weather Signup and view all the answers

How did the size of the moose population affect the impact of bad weather on them?

The larger population suffered more due to increased competition for food. Signup and view all the answers

What does the situation with the European rabbits in Australia demonstrate?

Density-independent factors can lead to rapid population growth. Signup and view all the answers

How did the lack of emigration options impact the moose population during the harsh winter?

It led to many moose dying from starvation. Signup and view all the answers

Why were artificial density-independent control measures like hunting considered ineffective?

They offered little hope of success and were expensive. Signup and view all the answers