Unit 8-Population Dynamics
- A given area can only support a certain size of population.
- Population numbers may either crash or reach an equilibrium around the carrying capacity. The human population is growing at an exponential rate overall.
- The population of LEDCs is 80% of world population and this is growing faster than MEDCs.
- Crude birth rate, death rate, fertility, doubling time and natural increase rate are all indicators of population change.
- Population pyramids and the demographic transition model show how populations change over time.
- These models help in predicting population changes.
exponential growth geometric growth logistic growth limiting factor density-dependent factor internal factor external factor density-independent factor S-curve carrying capacity environmental resistance J-curve dieback overshoot K-strategist K-selected r-strategist r-selected survivorship curves human carrying capacity technological development import CBR CDR NIR doubling time total fertility fertility rate age-sex pyramids demographic transition model
Last Modified on February 23, 2015