Under ideal conditions, a population can grow at an exponential
(r) assuming birth rate is higher than death rate.
Eventually the growth is limited by the carrying capacity
of the environment
and becomes logistic.
- This population starts with 500 individuals, 125 are born and 25 die the first year. What is the growth rate assuming births and deaths remain constant?
- Net gain is 100 / 500, or 20% per year. This would yield 600 after 1 year, then 720, 864, and 1036.8 after 4 years.