Chapter 9- Population
Terms
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- r-selection
- (rapid) unstable environmnet, large # of offspring, high mortality rate
- K-selection
- (keep) low reprotuctive rate, predictable environment, low predation rate
- carrying capacity
- max # of individuals that can be supported in an area
- agriculture and society
- responsible for expanding human population (10,000 yrs ago)
- Causes of overpopulation
-
-exceeding carrying capacity
-exceeding resources
-unsustainable use/depletion of resources
-increase births/survival rate - consequences of overpopulation
- famine, deforestation, war, child poverty, high birth rate, illiteracy, increased criminal rates, etc.
-
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 - environment influences population sixe by affecting this
- reproductive strategy (r/K selection)
- exponential growth
- unrestricted growth at a constant rate
- American Coot (r-selection)
- female will lay eggs, if food is limited female will feed babies with brightest heads and kill others by shaking heads
- 6 billionth baby
-
1:3 extreme poverty
4:10 marginally better off
1:10 born into relative poverty
girl-> less food/education