This model simulates the human population dynamics of Boston, Massachusetts. Because the city is geographically constrained, the birth rate equals the death rate when the population reaches its carrying capacity of 850,000 due to strict housing and space limits. The growth rate is positive when the population is below this capacity, creating an S-curve that starts at our initial population of 650,000.

The dynamics of a moose population with density-dependent birth rate...the birth rate equals the death rate when the population is at carrying capacity; the birth rate is greater than the death rate when the population is below carrying capacity; the birth rate is below the death rate when the population is above carrying capacity.

Modelo exponencial