Population Growth

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Population Growth
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Factors Affecting Population Growth

• Food
• Predators
• Availability of Mates
• Space

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Your Graph

• Line Graph
• X-axis Independent Variable
• Generation
• Y-axis Dependent Variable
• Population

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On the back of your graph answer the following
questions

1. What happened between the 1st and the 7th
   generation?
2. What happened from the 7th to the 8th generation?
   
3. Why was there a drop in the population around the
   8th generation?
4. What do you observe happening at the end of your
   graph between the 10th 14th generation?
5. Graph what you think would happen to the
   population over the next 4 generations. Then
   explain why you think this would happen.

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What if a cow were introduced into this
ecosystem? What would happen to the food web?
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Vocabulary

• Carrying Capacity The largest population of a
  species that an ecosystem can support without
  negatively affecting the ecosystem.

Carrying Capacity
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Current World Population 7 Billion People
7,000,000,000
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Human population growth
2012?7 billion
Population of China 1.3 billion India 1.1
billion
2005?6 billion
adding 82 million/year 200,000 per day!
Bubonic plague "Black Death"
1650?500 million
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How are these two graphs similar? How are they
different?
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What do you predict might happen eventually in
this graph?