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Population geography relates to variations in the distribution, composition, migration, and growth of populations. Population geography involves demography in a geographical perspective. [ a ] It focuses on the characteristics of population distributions that change in a spatial context.
The Demography of the World Population from 1950 to 2100. Data source: United Nations — World Population Prospects 2017. Demography (from Ancient Greek δῆμος (dêmos) 'people, society' and -γραφία (-graphía) 'writing, drawing, description') [1] is the statistical study of human populations: their size, composition (e.g., ethnic group, age), and how they change through the ...
One definition of population density: 0–350/km 2 is low 350–700/km 2 is medium 700+/km 2 is high . In sociology and population geography, population refers to a group of human beings with some predefined feature in common, such as location, race, ethnicity, nationality, or religion. [citation needed]
Articles relating to population geography, spatial variations in the distribution, composition, migration, and growth of populations to the terrain. Population geography involves demography in a geographical perspective.
Population growth in the Western world became more rapid after the introduction of vaccination and other improvements in medicine and sanitation. [43] Improved material conditions led to the population of Britain increasing from 10 million to 40 million in the 19th century. [44] The population of the United Kingdom reached 60 million in 2006. [45]
Population density is population divided by total land area, sometimes including seas and oceans, as appropriate. [1] Low densities may cause an extinction vortex and further reduce fertility. This is called the Allee effect after the scientist who identified it. Examples of the causes of reduced fertility in low population densities are: [2]
As of 2017, 13.6% (44.4 million) of the population was foreign born – an increase from 4.7% in 1970 but less than the 1890 record of 14.8%. 45% of the foreign born population were naturalized US citizens. 23% (10.3 million) of the foreign born community is undocumented, accounting for 3.2% of the total population. [75]
The rate at which a population increases in size if there are no density-dependent forces regulating the population is known as the intrinsic rate of increase.It is = where the derivative / is the rate of increase of the population, N is the population size, and r is the intrinsic rate of increase.