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Topic 7.11:
Extinction
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AP Bio Review!
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7.11: Extinction
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ENDURING UNDERSTANDING
EVO-3 Life continues to evolve within a changing environment.
LEARNING OBJECTIVE EVO-3.G
Describe factors that lead to the extinction of a population.
ESSENTIAL KNOWLEDGE EVO-3.G.1 Extinctions have occurred throughout Earth’s history.
LEARNING OBJECTIVE EVO-3.G.2 Extinction rates can be rapid during times of ecological stress.
ESSENTIAL KNOWLEDGE EVO-3.H Explain how the risk of extinction is affected by changes in the environment.
LEARNING OBJECTIVE EVO-3.H.1 Human activity can drive changes in ecosystems that cause extinctions.
ESSENTIAL KNOWLEDGE EVO-3.I Explain species diversity in an ecosystem as a function of speciation and extinction rates.
LEARNING OBJECTIVE EVO-3.I.1 The amount of diversity in an ecosystem can be determined by the rate of speciation and the rate of extinction.
ESSENTIAL KNOWLEDGE EVO-3.J Explain how extinction can make new environments available for adaptive radiation.
LEARNING OBJECTIVE EVO-3.J.1 Extinction provides newly available niches that can then be exploited by different species.
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What will we learn?
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7.11: Extinction
Extinctions have occurred throughout Earth’s history.
What is extinction?
Three facts about extinction:
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7.11: Extinction
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7.11: Extinction
Extinction rates can be rapid during periods of ecological stress.
Extinction
What can cause large scale extinctions that wipe out large numbers of species at one time?
How does extinction affect species diversity?
Human activity can drive changes in the ecosystems that cause extinctions.
How is human activity driving catastrophic ecosystem change?
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7.11: Extinction
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7.11: Extinction
Speciation and extinction rates can determine the amount of diversity in an ecosystem.
Define speciation:
Explain how ecosystems obtain high levels of biodiversity.
Explain how ecosystems obtain low levels of biodiversity.
Extinction provides newly available niches that can then be exploited by different species.
Define Niche:
What are some of the different ecological roles?
How does extinction open niches for species to occupy?
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7.11: Extinction
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7.11: Extinction
Key Takeaways
Lets Practice: Questions and Methods
Null Hypothesis:
Alternative Hypothesis:
Write your answers first then correct as needed.