What is Extinction?

  • In biology and ecology, extinction is the end of an organism or of a group of organisms, normally a species is extinct when the last existing member dies.
  • Extinction therefore becomes a certainty when there are no surviving individuals that can reproduce and create a new generation. A species may become functionally extinct when only a handful of individuals survive, which cannot reproduce due to poor health, age, sparse distribution over a large range, a lack of individuals of both sexes (in sexually reproducing species), or other reasons.
  • Causes:
  • Genetics and demographic phenomena
  • Genetic pollution
  • Habitat degradation
  • Predation, competition, and disease
  • Co extinction
  • Climate change
  • Poaching