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Explain how biotic factors influence the distribution of organisms in an ecosystem.

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  • competition for environmental resources
  • grazing - too little leads to dominant plants outcompeting other species, too much reduces species numbers overall. Both decrease biodiversity
  • predation - a reduction in predators can lead to an increase in prey. High numbers of prey can lead to overgrazing, which can reduce biodiversity
  • disease
  • food availability
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