Population size, density, and distribution can be used to analyze the health of a species including humans.
Population size refers to the number of organisms of the same species living in the same area.
Population size is unique since it may give an indication of the viability of a species.
A smaller population size may indicate that a species is in danger of extinction.
Population density refers to the average number of organisms in a population per unit area, such as 10 persons per square mile.
High population densities can lead to overcrowding, disease, and conflict and may be caused by lack of resources due to violence or other environmental factors.
Population distribution refers to how a population is spread out in a given area.
Some areas of Alaska, for example, are sparsely populated due to bad weather conditions.
Understanding population distribution may help city planners and emergency workers in their efforts to prepare for disasters.