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1 Biological population densities 1.1 Human densities 1.2 Countries and dependent territories 1.3 Other methods of measurement 2 See also 2.1 Lists of entities by population density 3 References 4 External links Toggle the table of contents Population density 131 languages Afrikaans Alemannisch العربية Aragonés Arpetan Asturianu Авар Azərbaycanca
A demographic structure of a population is how populations are often quantified. The total number of individuals in a population is defined as a population size, and how dense these individuals are is defined as population density. There is also a population’s geographic range, which has limits that a species can tolerate (such as temperature).
Population dynamics is the type of mathematics used to model and study the size and age composition of populations as dynamical systems . Contents 1 History 2 Logistic function 3 Intrinsic rate of increase 4 Epidemiology 5 Geometric populations 5.1 Doubling time 5.2 Half-life of geometric populations 5.3 Geometric (R) growth constant
In ecology, a population is a group of organisms of the same species who inhabit the same particular geographical area and are capable of interbreeding.   The area of a sexual population is the area where inter-breeding is possible between any pair within the area and more probable than cross-breeding with individuals from other areas. 
In statistics, probability density estimation or simply density estimation is the construction of an estimate, based on observed data, of an unobservable underlying probability density function. The unobservable density function is thought of as the density according to which a large population is distributed; the data are usually thought of as ...
Urban density is a term used in urban planning and urban design to refer to the number of people inhabiting a given urbanized area. As such it is to be distinguished from other measures of population density. Urban density is considered an important factor in understanding how cities function.
The physiological density or real population density is the number of people per unit area of arable land . A higher physiological density suggests that the available agricultural land is being used by more and may reach its output limit sooner than a country that has a lower physiological density.