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2. Population - Wikipedia

   en.wikipedia.org/wiki/Population

   Population is the term typically used to refer to the number of people in a single area. Governments conduct a census to quantify the size of a resident population within a given jurisdiction. The term is also applied to non-human [ [Animal| microorganisms, and plants, and has specific uses within such fields as ecology and genetics .

3. Demography - Wikipedia

   en.wikipedia.org/wiki/Demography

   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') is the statistical study of human populations: their size, composition (e.g., ethnic group, age), and how they change through the interplay ...

4. Population geography - Wikipedia

   en.wikipedia.org/wiki/Population_geography

   Population geography. Satellite image of Earth at night. 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.

5. Population genetics - Wikipedia

   en.wikipedia.org/wiki/Population_genetics

   Genographic Project. ISOGG. v. t. e. Population genetics is a subfield of genetics that deals with genetic differences within and among populations, and is a part of evolutionary biology. Studies in this branch of biology examine such phenomena as adaptation, speciation, and population structure. [1] Population genetics was a vital ingredient ...

6. Population density - Wikipedia

   en.wikipedia.org/wiki/Population_density

   Population density is the number of people per unit of area, usually transcribed as "per square kilometer" or square mile, and which may include or exclude, for example, areas of water or glaciers. Commonly this is calculated for a county, city, country, another territory or the entire world . The world's population is around 8,000,000,000 [3 ...

7. Statistical population - Wikipedia

   en.wikipedia.org/wiki/Statistical_population

   In statistics, a population is a set of similar items or events which is of interest for some question or experiment. A statistical population can be a group of existing objects (e.g. the set of all stars within the Milky Way galaxy) or a hypothetical and potentially infinite group of objects conceived as a generalization from experience (e.g. the set of all possible hands in a game of poker).

8. Population ecology - Wikipedia

   en.wikipedia.org/wiki/Population_ecology

   Population. A group of conspecific individuals that is demographically, genetically, or spatially disjunct from other groups of individuals. Aggregation. A spatially clustered group of individuals. Deme. A group of individuals more genetically similar to each other than to other individuals, usually with some degree of spatial isolation as well.

9. Demographic statistics - Wikipedia

   en.wikipedia.org/wiki/Demographic_statistics

   Demographic statistics. Demographic statistics are measures of the characteristics of, or changes to, a population. Records of births, deaths, marriages, immigration and emigration and a regular census of population provide information that is key to making sound decisions about national policy. A useful summary of such data is the population ...