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–
2000.
Population growth is the change in
population over time, and can be quantified as the change in the number of individuals in a population per unit time. The term
population growth can technically refer to any species, but almost always refers to humans, and it is often used informally for the more specific
demographics term
population growth rate (see below), and is often used to refer specifically to the growth of the
World population.
Simple models of population growth include the Malthusian Growth Model and the logistic map.
Population growth rate
In demographics and ecology,
Population growth rate (PGR) is the
Fraction (mathematics)al rate at which the number of individuals in a population increases. Specifically, PGR ordinarily refers to the change in population over a specific time period expressed as a
percentage of the number of individuals in the population at the beginning of that period. This can be written as the formula:
\mathrm{Growth\ rate} = + \mathrm{immigration}) - (\mathrm{deaths} + \mathrm{emigration}) / \mathrm{population}
The crude death rate as defined above and applied to a whole population can give a misleading impression. For example, the number of deaths per 1000 people can be higher for developed nations than in less-developed countries, despite standards of health being better in developed countries.
It is usually measured in a fraction or percent in relation to the base population.
Human population growth rate
(2006 estimate). Population growth ratePopulation growth which exceeds the
carrying capacity of an area or environment results in
overpopulation. Spikes in human population can cause problems such as
pollution and traffic congestion, though these can be addressed by technological and economic changes. Conversely, such areas may be considered "underpopulated" if the population is not large enough to maintain an economic system (see population decline).
Globally, the growth rate of the
World population has been steadily declining (ie. population is growing more slowly than in the recent past, see External Links), although the last 50 years have seen a rapid increase in population due to History of medicine#Modern medicine and massive increase in agricultural productivity BBC NEWS | The end of India's green revolution? made by the Green Revolution. Food First/Institute for Food and Development Policy Rising food prices curb aid to global poor Record rise in wheat price prompts UN official to warn that surge in food prices may trigger social unrest in developing countries
The actual annual growth in the number of humans is in decline, from 87 million per annum in the late 1980s, down to 75 million per annum in 2006. Growth remains high in the
Middle East, South Asia, Southeast Asia,
Latin America, and primarily in Sub-Saharan Africa.Ron Nielsen,
The little green handbook, Picador, New York (2006) ISBN 0312425813
In some countries there is negative population growth (ie. net decrease in population over time), especially in
Central Europe and
Eastern Europe (mainly due to low
fertility rates) and Southern Africa (due to the high number of HIV-related deaths). Within the next decade, Japan and some countries in Western Europe are also expected to encounter negative population growth due to sub-replacement fertility rates.
References
See also
s. The vertical axis is
Logarithmic scale and is millions of people.
- Carrying capacity
- Density dependent inhibition
- World population
- Immigration
- Population pyramid
- World population estimates
- Doubling time
- Overpopulation
- Population decline
- Exponential growth
- Green Revolution
- Logistic function - concept related to logistic model
- Ronald Fisher - who referred to the population growth rate as the Malthusian Parameter
- List of countries and territories by fertility rate
External links
- World population growth rates 1950-2050
- The Magnitude Of Population Growth And Its Consequences
- UN University annual "State of the Future" report, including updates on Millennium Project goals including balancing global population growth & resources
- BBC News - Birth rate 'harms poverty goals' - 08/12/06
- Trend of growth rate with total global population
- A project designed to create a unique "shape" for every individual on the planet when the population peaks, by American artist Allan McCollum
– 2000.
Population growth is the change in population over time, and can be quantified as the change in the number of individuals in a population per unit time. The term
population growth can technically refer to any species, but almost always refers to humans, and it is often used informally for the more specific
demographics term
population growth rate (see below), and is often used to refer specifically to the growth of the World population.
Simple models of population growth include the Malthusian Growth Model and the logistic map.
Population growth rate
In demographics and ecology,
Population growth rate (PGR) is the
Fraction (mathematics)al rate at which the number of individuals in a population increases. Specifically, PGR ordinarily refers to the change in population over a specific time period expressed as a
percentage of the number of individuals in the population at the beginning of that period. This can be written as the formula:
\mathrm{Growth\ rate} = + \mathrm{immigration}) - (\mathrm{deaths} + \mathrm{emigration}) / \mathrm{population}
The crude death rate as defined above and applied to a whole population can give a misleading impression. For example, the number of deaths per 1000 people can be higher for developed nations than in less-developed countries, despite standards of health being better in developed countries.
It is usually measured in a fraction or percent in relation to the base population.
Human population growth rate
(2006 estimate). Population growth ratePopulation growth which exceeds the
carrying capacity of an area or environment results in
overpopulation. Spikes in human population can cause problems such as
pollution and
traffic congestion, though these can be addressed by technological and economic changes. Conversely, such areas may be considered "underpopulated" if the population is not large enough to maintain an economic system (see population decline).
Globally, the growth rate of the
World population has been steadily declining (ie. population is growing more slowly than in the recent past, see External Links), although the last 50 years have seen a rapid increase in population due to History of medicine#Modern medicine and massive increase in agricultural productivity BBC NEWS | The end of India's green revolution? made by the Green Revolution. Food First/Institute for Food and Development Policy Rising food prices curb aid to global poor Record rise in wheat price prompts UN official to warn that surge in food prices may trigger social unrest in developing countries
The actual annual growth in the number of humans is in decline, from 87 million per annum in the late 1980s, down to 75 million per annum in 2006. Growth remains high in the Middle East,
South Asia,
Southeast Asia,
Latin America, and primarily in
Sub-Saharan Africa.Ron Nielsen,
The little green handbook, Picador, New York (2006) ISBN 0312425813
In some countries there is negative population growth (ie. net decrease in population over time), especially in Central Europe and Eastern Europe (mainly due to low
fertility rates) and
Southern Africa (due to the high number of
HIV-related deaths). Within the next decade,
Japan and some countries in
Western Europe are also expected to encounter negative population growth due to
sub-replacement fertility rates.
References
See also
s. The vertical axis is Logarithmic scale and is millions of people.
- Carrying capacity
- Density dependent inhibition
- World population
- Immigration
- Population pyramid
- World population estimates
- Doubling time
- Overpopulation
- Population decline
- Exponential growth
- Green Revolution
- Logistic function - concept related to logistic model
- Ronald Fisher - who referred to the population growth rate as the Malthusian Parameter
- List of countries and territories by fertility rate
External links
- World population growth rates 1950-2050
- The Magnitude Of Population Growth And Its Consequences
- UN University annual "State of the Future" report, including updates on Millennium Project goals including balancing global population growth & resources
- BBC News - Birth rate 'harms poverty goals' - 08/12/06
- Trend of growth rate with total global population
- A project designed to create a unique "shape" for every individual on the planet when the population peaks, by American artist Allan McCollum
Population
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Population Growth
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Population growth - Wikipedia, the free encyclopedia
Population growth is the change in population over time, and can be quantified as the change in the number of individuals in a population using "per unit time" for measurement.
BBC News | ASIA-PACIFIC | China's population growth 'slowing'
China's first nationwide census in a decade puts the population at over 1,250 million - but some say the real figure is much higher. ... China has announced that its first ...
BBC News | World | Global population growth rate slows
The world population is increasing at 80 million a year - but the actual rate of growth is gradually slowing, according to a report from a UN agency. ... Wednesday, September 2 ...
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I think it is important that the peoples of small island nations, when considering the human factor and what present and future generations of islanders aspire to, think carefully ...
Population Growth Project
343,000 Amount by which the population of all European Union Countries combined grew in 2000.
Changing Population Growth
Interactive revision for Standard Grade Geography. ... The steps that have been taken to reduce the problems caused by a rapidly growing population include
Definition: population growth from Online Medical Dictionary
The Online Medical Dictionary is a searchable dictionary of definitions from medicine, science and technology.
Population growth - Time Unknown
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