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Overpopulation, underpopulation and optimum population

Overpopulation, underpopulation and optimum population. L.O.s To define and explain the terms: Overpopulation, Underpopulation, Optimum population, Population density and Carrying Capacity and provide examples as evidence. Population distribution.

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Overpopulation, underpopulation and optimum population

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  1. Overpopulation, underpopulation and optimum population L.O.s To define and explain the terms: Overpopulation, Underpopulation, Optimum population, Population density and Carrying Capacity and provide examples as evidence

  2. Population distribution Greatest concentrations of population are in India and China Vast areas in the continental interiors are uninhabited Why are these areas uninhabited? This image of population distribution was obtained from a satellite-based model which disregards time of day.

  3. Population density What is the difference between population distribution and density? Distribution uses absolute numbers, whereas density gives numbers per unit area (usually per sq.km)

  4. Population density Some of the most densely populated places are islands or small states: Macao, China 20,346 people per km2 Monaco 33,104 people per km2 Singapore 6,785 people per km2 But not all: Bangladesh 1,035 people per km2 Bahrain 1,098 people per km2 World average: 49 people per km2

  5. The Population-Resource Balance Can you define the following terms? Over-population When there are too many people in an area for the available resources Under-population When there are too few people in an area to use the available resources efficiently Optimum population The theoretical ‘ideal’ where the people can work with the available resources to achieve the best standard of living for the population.

  6. Carrying capacity Any geographical area has a carrying capacity – the maximum number of people it can sustainably support with the available natural resources The carrying capacity will vary through time with changes in technology and economic and social development. Semi-arid West Africa: a carrying capacity of just 10 people per square km due to its poor soils and unreliable rainfall.

  7. Optimum population An optimum population size is not the same as the maximum number of people that could be packed into an area at one time. Freedom from persecution and inequality Small enough to ensure the preservation of biodiversity What are the factors which identify optimum population? Sufficiently large to provide a ‘critical mass’ where creativity (e.g. artistic, technological) would be stimulated Small enough to guarantee the minimal physical ingredients of a decent life to everyone

  8. Over-population Maybe over-population refers to an upper limit on population density. Yet some of the most densely packed areas on Earth are also some of the most economically successful, while some parts of the world with very low population density ratios are also some of the poorest, most starvation-prone. Netherlands has high population density but is it over-populated? Is Mexico over-populated because of its economic problems?

  9. Over-population “An area is over-populated if fewer people would lead to a higher standard of living” (Lorimer 1945) Areas that many people consider to be over-populated are not necessarily densely populated Is it possible to formulate a sentence which compares Ethiopia and Singapore?

  10. Under-population Environmental Climate Soils Vegetation Inaccessiblity Remoteness Poor communication Under-population Type of economy History Population composition What is under-population? Under-population is usually defined as when a country's population has declined too much to support its current economic system. What causes under-population? It is not exclusively concerned with areas of low population density.

  11. Under-population Canada is the world's second-largest country in total area, after Russia. The population density is 3.5 people per square kilometre, which is among the lowest in the world.

  12. Quebec Halifax Montreal Victoria Vancouver Regina Winnipeg Calgary Toronto But the population figure by itself is misleading; approximately 80% of Canada's population live within 200 km of the US border. WHY?

  13. An example of Overpopulation:Unreported World – The PhilippinesManila: the city with too many people • http://www.channel4.com/programmes/unreported-world/4od

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