Human population
Pop. Control
Increased affluence=increased
environmental challenges
India: education of demals
access to family planning
China: one child policy
Rule of 70
finding the doubling time of a pop.
doubling time (in years)= 70/growth rate
Survivorship curve
(as a function of age)
Type 3: lots of young die
(trees)
Type 2: does not really depend on age
(birds)
Type 1: live a long time
die of old age(human)
Pop. Dynamics
Humans are not unique in their ability to alter their environment. The ability ro alter their environment to increase its carrying capacity, sometimes to the detriment of other species.
Long-term exponential growth carries with it the potential risk of famine, disease, and large-scale death, as well as social consequences of crowding such as increased crime.
Growth Models
Logistic Growth Rate
Exponential Growth Rate
Growth Rate
Age Structure
Sex Ratio
Factors influencing
pop.size
density independent factors:
fire, floods, climatic events
density dependent factors:
food, water, shelter
