Final answer:
Migration refers to the movement of individuals into or out of a population. It includes immigration, which increases population size, and emigration, which decreases it. These movements are integral to understanding population growth rates.
Step-by-step explanation:
Definition of Migration
The movement of individuals into or out of a population is known as migration. There are two main types of migration with regards to population dynamics: immigration and emigration. Immigration is the arrival of new individuals into a population, typically leading to an increase in population size and growth rate.
Conversely, emigration is when individuals leave a population, resulting in a decrease in population size and growth rate.
Migration can be categorized as voluntary, involuntary, or forced, based on the circumstances driving the population movement.
Key Types of Migration Affecting Population Growth
Immigration: Movement of individuals into a population from other areas.Emigration: Movement of individuals out of a population to settle elsewhere.
Moreover, population growth rate can be modified to account for migration by the equation: growth rate = (birth rate + immigration rate) – (death rate + emigration rate). This calculation demonstrates that migration is a crucial factor in determining a population's overall dynamics.