Limitations to distribution range

3 important questions on Limitations to distribution range

What is an ecological niche?

  • The ecological niche is a combination of variables that allows species to reproduce, survive and maintain numbers.
  • Geographic range is a spatial reflection of niche.
  • Niche is NOT natural characteristics, function or a place. It is a concept.

What are the abiotic limitations to the geographical range of a species?

Physical factors
  • Rainfall
  • Temperature
  • Soil and water chemistry
Disturbances
  • Fire
  • Storms
  • etc.

What are the biotic limitations to the geographical range of a species?

Interactions with other organisms
  • Competition
  • Predation
  • Mutualism
  • Diseases

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