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Extinction [ Biology - Ecology ]
Adjective: Extinct

Dictionary of botanic terminology - index of names

     
 
  • Extinction: The death of an entire species, the fact of becoming extinct.
  • Extinct: Having no living members, as is the case with many organisms known only from fossils.
 
In biology and ecology, extinction is the total and irreversible ceasing of existence or disappearance a group of related organisms ( species or higher taxa), from a given local habitat, geographic area, or globally in the entire world (The term extinction is also applied to the condition that occurs when the number of individuals in a population falls below the level that will allow for sustainable reproduction or when no living representatives of a species exist in the wild).
The moment of extinction is generally considered to be the death of the last individual of that species.
Extinction is both a natural (dinosaurs, trilobites) and human-induced process (dodo, moa, Thylacine); it is estimated that 99.9% of all species that have ever lived are now extinct. Extiction can result from various human activities, including the destruction of habitats or the overexploitation of species that are hunted or collected as a resource, but the most effective agent in the extinction of species is the pressure of other species.
 
     

 

 

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