Factors Affecting Size of Population

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  • immigration
  • emigration

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iii) Migration

i) Birth ra

ii) Death rate

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iv) Biotic factors

  • competition
  • predation
  • diseases
  • food availability

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v) Physical (abiotic) factors

  • temperature
  • humidity
  • salinity
  • acidity
  • rainfall
  • natural phenomena

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i) Birth rate