Chapters 5-6 Population Review. Important Facts 40% of population growth is US is due to immigration...
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![Page 1: Chapters 5-6 Population Review. Important Facts 40% of population growth is US is due to immigration (legal and illegal) China and India have 36% of world’s.](https://reader035.fdocuments.net/reader035/viewer/2022072015/56649ed45503460f94be452b/html5/thumbnails/1.jpg)
Chapters 5-6
Population
Review
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Important Facts
• 40% of population growth is US is due to immigration (legal and illegal)
• China and India have 36% of world’s population--US is 3rd with 4.5
• US infant mortality level is higher than 39 other countries. WHY?
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Fertility
• Replacement Level Fertility vs. Total Fertility Rate– Why is RLF higher than 2? (2.1 developed
countries; 2.5 developing)– TFR has declined since 1950 but is still
higher than RLF--what does this mean for population growth?
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• World Population Growth: 1.22%
• Developing Countries: – Have 82% of population– Growth Rate: 1.5%
• Developed Countries:– Have 18% of population– Growth Rate: 0.1%
![Page 5: Chapters 5-6 Population Review. Important Facts 40% of population growth is US is due to immigration (legal and illegal) China and India have 36% of world’s.](https://reader035.fdocuments.net/reader035/viewer/2022072015/56649ed45503460f94be452b/html5/thumbnails/5.jpg)
Population Math
• Rule of 70 (doubling time): 70%/r%• Population Change
(birth + immigration) - (death+emigration)
• Population Density: population/area• Birth or Death rate: #birthordeath/population• Population Growth Rate (r):
birth-death/total population
(convert to percent)
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2 Factors that Indicate Overall Health of Country
• Death Rate– The rapid population growth of the world is
due more to decreasing death rate than to births
• Infant Mortality– Discuss factors that affect infant mortality
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Most Important Statistic for Predicting World Population
Growth
• 28% of world’s population was under age 15 in 2008
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Population Pyramids
• Compare developing vs. developed countries
• Zero Population growth countries-shape of pyramid? Problems with declining birth rates?
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Demographic Transition Model
• Name and explain each stage
• Demographic Trap? Why are countries “stuck” in Stage 2?
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China vs. India
• Why has China been more successful in curbing population growth?
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Species Interactions
• Competition– Ways to reduce competition?
• Predation– Ways to avoid predation
• Commensalism• Mutualism• Parasitism
Coevolution
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Population Graphs
• Exponential: J-shape
• Logistic: S-shape
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Sheep in TasmaniaMoose in Alaska
• Why can sheep maintain higher levels after they overshoot the carrying capacity than the moose?
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Small Populations
• Why a problem?
• What causes loss of genetic diversity?
• Relate to endangered species
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Population Growth Cycles
• Stable, Irruptive, Cyclic, Irregular
• Lynx/Hare cycle
• Moose/Wolves in Isle Royale
– Bottom up versus top down control
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Succession
• Primary vs. Secondary
• Relate to Dismal Swamp
• Facilitation, Tolerance, Inhibition