What type of population does not experience immigration or emigration?

A closed population is defined as a group of organisms that does not experience immigration (the movement of individuals into the population) or emigration (the movement of individuals out of the population). This means that the only changes in the population's size and composition come from births and deaths within that population.

In a closed population, the only factors affecting population dynamics are the birth rate and the death rate. This setup provides a clear framework for studying population growth and decline without the influence of external individuals or factors that typically accompany immigration and emigration.

In contrast, open populations are characterized by the movement of individuals into and out of the population, which means their numbers can fluctuate due to immigration and emigration. Stable and dynamic populations refer to the growth rates and stability of populations but do not specifically imply the absence of immigration or emigration.