Populations and Sustainability


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Population - Keywords.

PopulationA group of organisms of the same species, which live in the same place at the same time and can interbreed with one another.

Biotic factor - how living organisms affect eachother; 

  • Food supply
  • Predation 
  • Disease

Abiotic factor - the effect of non-living components of the eosystem;

  • pH
  • Temperature
  • Soil type

Carrying capacity - the maximum population time that can be maintained over a period of time in a particular habitat

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Population - Limiting factors.

A habitat cannot support a population larger than its carry capacity because of limiting factors, which place a limit on the poulation size.


  • food
  • water
  • light
  • oxygen
  • nesting sites
  • shelter

Effects on other species:

  • predators
  • parasites

Intensity of competition for resources.

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