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11 Cards in this Set
- Front
- Back
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r-selection
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(rapid) unstable environmnet, large # of offspring, high mortality rate
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K-selection
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(keep) low reprotuctive rate, predictable environment, low predation rate
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carrying capacity
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max # of individuals that can be supported in an area
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agriculture and society
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responsible for expanding human population (10,000 yrs ago)
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Causes of overpopulation
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-exceeding carrying capacity
-exceeding resources -unsustainable use/depletion of resources -increase births/survival rate |
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consequences of overpopulation
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famine, deforestation, war, child poverty, high birth rate, illiteracy, increased criminal rates, etc.
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World Population:
India/Japan/China/US |
India-more infants than can be supported (r-selection)
Japan- parasite singles, pop. decline by 50% China- One per family policy US- below replacement, but immigration allows US to grow |
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environment influences population sixe by affecting this
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reproductive strategy (r/K selection)
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exponential growth
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unrestricted growth at a constant rate
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American Coot (r-selection)
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female will lay eggs, if food is limited female will feed babies with brightest heads and kill others by shaking heads
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6 billionth baby
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1:3 extreme poverty
4:10 marginally better off 1:10 born into relative poverty girl-> less food/education |
