Population density by country, 2006

Population density is a measurement of population per unit area or unit volume. It is frequently applied to living organisms, humans in particular. Image File history File links Download high resolution version (1368x681, 53 KB) Summary Countries of the world by population density, based on 30 March 2006 version of wikipedia:List of countries by population density. ... Image File history File links Download high resolution version (1368x681, 53 KB) Summary Countries of the world by population density, based on 30 March 2006 version of wikipedia:List of countries by population density. ... 2006 (MMVI) is a common year starting on Sunday of the Gregorian calendar. ... In biology and ecology, an organism (in Greek organon = instrument) is a living being. ... Trinomial name Homo sapiens sapiens Linnaeus, 1758 Humans, or human beings, are bipedal primates belonging to the mammalian species Homo sapiens (Latin for wise man or knowing man) under the family Hominidae (the great apes). ...

Biological population densities

Population density is a common biological measurement and is often used by conservationists as a more appropriate measure than absolute numbers. Low population densities may cause an extinction vortex, where low densities lead to further reduced fertility. This is referred to as the Allee effect, named after W. C. Allee, who first identified it. Examples of this may include: Conservationists are those people who tend to more highly rank the wise use of the Earths resources and ecosystems. ... Extinction Vortices are a means through which conservation biologists, geneticists and ecologists can understand the dynamics of and categorize extinctions in the context of their causes. ... For other meanings of density, see density (disambiguation) Density (symbol: ρ - Greek: rho) is a measure of mass per unit of volume. ... The Allee effect is a phenomenon in biology named after W. C. Allee, who first wrote extensively on it. ... Warder Clyde Allee (June 5, 1885 - March 18, 1955) was an American zoologist and ecologist who taught animal ecology at the University of Chicago. ...

• Increased problems with locating mates in areas of low density.
• Increased inbreeding in areas of low population density.
• Increased susceptibility to catastrophic events in low population densities.

Different species will have different expected densities. For example R-selected species commonly have high population densities, while K-selected species may have lower population densities. Low population densities may be associated with specialised mate location adaptations such as specialised pollinators; as found in the orchid family (Orchidaceae). Inbreeding is breeding between close relatives, whether plant or animal. ... In ecology, r-selection (note: lower case r) relates to the selection of traits (in organisms) that allow success in unstable or unpredictable environments. ... In ecology, K-selection (note : upper case K) relates to the selection of traits (in organisms) that allow success in stable or predictable environments. ... Orchid re-directs here; for alternate uses see Orchid (disambiguation) Genera Over 800 See List of Orchidaceae genera. ...

Human population density

Taiwanese people waiting for the Taipei Rapid Transit System in Taipei, Taiwan. Taiwan is ranked 14th in the List of countries by population density.

A street in Hong Kong, one of the most densely-populated places in the world.

Main article: list of countries by population density

For humans, population density is the number of persons per unit of area (which may include or exclude cultivated or potentially productive area). Commonly this may be calculated for a county, city, country, another territory, or the entire world. Image File history File linksMetadata Download high resolution version (2048x1536, 1146 KB) Summary Crowds of people pouring onto the platform at the Taipei Rapid Transit Systems Sun Yat-sen Memorial Hall Station on New Years Eve, 2005. ... Image File history File linksMetadata Download high resolution version (2048x1536, 1146 KB) Summary Crowds of people pouring onto the platform at the Taipei Rapid Transit Systems Sun Yat-sen Memorial Hall Station on New Years Eve, 2005. ... It has been suggested that this article or section be merged into Demographics of Taiwan. ... MRT Ximen Station Interior of the ZhongXiao DunHua MRT station The Taipei Rapid Transit System (Traditional Chinese: 台北大眾捷運系統; Pinyin: TáibÄ›i Dàzhòng Jiéyùn XìtÇ’ng, also known as the MRT, Metro Taipei, or by locals simply as the Traditional Chinese: 捷運; Pinyin: Jiéyùn) is... Nickname: the City of Azaleas Government Official Website City of Taipei Mayor Ma Ying-jeou Capital District Xinyi Geographical characteristics Area  - Total  - % water Ranked 16 of 25 271. ... Population density by country, 2006 List of countries/dependencies by population density in inhabitants/km². The figures in the following table are based on areas including inland water bodies (lakes, reservoirs, rivers). ... Image File history File linksMetadata Download high resolution version (3008x2000, 769 KB) Summary A crowd in Soy Street in Mong Kok, Hong Kong. ... Image File history File linksMetadata Download high resolution version (3008x2000, 769 KB) Summary A crowd in Soy Street in Mong Kok, Hong Kong. ... Population density by country, 2006 List of countries/dependencies by population density in inhabitants/km². The figures in the following table are based on areas including inland water bodies (lakes, reservoirs, rivers). ... Human beings are defined variously in biological, spiritual, and cultural terms, or in combinations thereof. ... A county is generally a sub-unit of regional self-government within a sovereign jurisdiction. ... Chicago from the air. ... Look up country in Wiktionary, the free dictionary. ... A territory is a defined area (including land and waters), usually considered to be a possession of an animal, person, organization, or institution (from the word terra, meaning land). In politics, a territory is an area of land under the jurisdiction of a governmental authority. ... Earth (often referred to as the Earth, Terra, or Planet Earth) is the third planet in the solar system in terms of distance from the Sun, and the fifth largest. ...

The world population is 6.5 billion humans, and Earth's area is 510 million square kilometers (200 million square miles). Therefore the world-wide human population density is 6500 million / 510 million = 13 per km² (33 per mi²), or 43 per km² (112 per mi²) considering that humans live on land, which forms 150 million km² of the earth. This density rises with the population growth, and some people think there is a limit of what the Earth can support. To meet Wikipedias quality standards, this article or section may require cleanup. ... Earth (often referred to as the Earth, Terra, or Planet Earth) is the third planet in the solar system in terms of distance from the Sun, and the fifth largest. ...

Several of the highest-density territories in the world are very small city-states, micronations or dependencies. These territories share a relatively small area and an exceptionally high urbanization level, with an economically specialized city population drawing also on rural resources outside the area, illustrating the difference between high population density and overpopulation. A city-state is a region controlled exclusively by a city. ... This article is about small nations that are not recognized by any world government. ... Dependency has a number of meanings: In project management, a dependency is a link amongst a projects terminal elements. ... Chicago from the air. ... Map of countries by population —showing the population of the China and India in the billions. ...

Cities with exceptionally high population densities are often considered to be overpopulated, though the extent to which this is the case depends on factors like quality of housing and infrastructure or access to resources. Most of the largest densely-populated cities are in southern and eastern Asia, though Cairo and Lagos in Africa also fall into the category. City population is however, heavily dependent on the definition used for the urban area: densities will be far higher for the central municipality than when more recently-developed and as yet administratively unincorporated suburbs are included, as in the concepts of agglomeration or metropolitan area, the latter including sometimes neighbouring cities. World map showing the location of Asia. ... Cairos location in Egypt Coordinates: Governor Dr. Abdul Azim Wazir Area    - City 210 km²  - Metro 1,492 km² Population    - City (2005) 7,438,376  - Density 35,420/km²  - Urban 10,834,495  - Metro 15,200,000 Time zone EET (UTC+2) EEST (UTC+3) Cairo (Arabic: ‎ translit: , translated the... Lagos is the largest city in Nigeria. ... For other uses, see Africa (disambiguation). ... In the study of human settlements, an agglomeration is an extended city or town area comprising the built-up area of a central place (usually a municipality) and any suburbs or adjacent satellite towns. ... A metropolitan area is a large population center consisting of a large city and its adjacent zone of influence, or of several neighboring cities or towns and adjoining areas, with one or more large cities serving as its hub or hubs. ...

Other methods of measuring population density

Population density map of the world in 1994.

While the arithmetic density is the most common way of measuring population density, several other methods have been developed which aim to provide a more accurate measure of population density over a specific area. Image File history File links Pop_density. ... Image File history File links Pop_density. ...

Arithmetic density – The total number of people / area of land measured in km² or mi².

Physiological density – The total population divided by the amount of arable land.

Agricultural density – The total rural population to the amount of agricultural land.

Residential density – The number of people living in an urban area divided by the amount of residential land.

Ecological optimum – The density of population which can be supported by the area's natural resources.

See also

• List of countries by population density
• List of countries by population
• List of religious populations
• List of selected cities by population density
• Human geography
• Idealised population
• Optimum population
• Population bottleneck
• Population coding
• Population genetics
• Population health
• Population momentum
• Population pyramid
• Small population size

Population density by country, 2006 List of countries/dependencies by population density in inhabitants/km². The figures in the following table are based on areas including inland water bodies (lakes, reservoirs, rivers). ... This is a list of sovereign states and other territories by population, using the most recently available official figures. ... This article or section does not cite its references or sources. ... This article or section does not cite its references or sources. ... Population density by country, 2006 Human geography is a branch of geography that focuses on the systematic study of patterns and processes that shape human interaction with the environment, with particular reference to the causes and consequences of the spatial distribution of human activity on the Earths surface. ... In population genetics an idealised population or a Fisher — Wright population is a population whose members can mate and reproduce with any other member of the other gender, and where random genetic drift does not occur. ... To meet Wikipedias quality standards, this article or section may require cleanup. ... A population bottleneck (or genetic bottleneck) is an evolutionary event in which a significant percentage of a population or species is killed or otherwise prevented from reproducing, and the population is reduced by 50% or more, often by several orders of magnitude. ... Population encoding is a means by which information about something is encoded in the brain. ... Population genetics is the study of the distribution of and change in allele frequencies under the influence of the four evolutionary forces: natural selection, genetic drift, mutation, and migration. ... Population health is an approach to health that aims to improve the health of the entire population and to reduce health inequities among population groups. ... Population momentum is an effect which causes population growth. ... A population pyramid is two back-to-back bar graphs, one showing the number of males and one showing females in a particular population in five-year age groups. ... Species with a small population size are subject to a higher chance of extinction because their small population size makes them more vulnerable to genetic drift, resulting in stochastic variation in their gene pool, their demography and their environment. ...

External links

• CityRanks.com combines Google Maps and 2000 Census data to show the population densities of U.S. zip codes on an interactive map.
• Selected Current and Historic City, Ward & Neighborhood Densities
• Population density world-map

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