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- Extinction abstract "In biology and ecology, extinction is the end of an organism or of a group of organisms (taxon), normally a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and recover may have been lost before this point. Because a species' potential range may be very large, determining this moment is difficult, and is usually done retrospectively. This difficulty leads to phenomena such as Lazarus taxa, where a species presumed extinct abruptly "re-appears" (typically in the fossil record) after a period of apparent absence.Through evolution, new species arise through the process of speciation—where new varieties of organisms arise and thrive when they are able to find and exploit an ecological niche—and species become extinct when they are no longer able to survive in changing conditions or against superior competition. The relationship between animals and their ecological niches has been firmly established. A typical species becomes extinct within 10 million years of its first appearance, although some species, called living fossils, survive with virtually no morphological change for hundreds of millions of years. Most extinctions have occurred naturally, prior to Homo sapiens walking on Earth: it is estimated that 99.9% of all species that have ever existed are now extinct.Mass extinctions are relatively rare events; however, isolated extinctions are quite common. Only recently have extinctions been recorded and scientists have become alarmed at the current high rate of extinctions. Most species that become extinct are never scientifically documented. Some scientists estimate that up to half of presently existing plant and animal species may become extinct by 2100. It is difficult to estimate the trajectory that biodiversity might have taken without human impact but scientists at the University of Bristol estimate that biodiversity might increase exponentially without human influence.".
- Extinction thumbnail Various_dinosaurs.png?width=300.
- Extinction wikiPageExternalLink Natural_His,2106.
- Extinction wikiPageExternalLink creo.amnh.org.
- Extinction wikiPageExternalLink jack.
- Extinction wikiPageID "49417".
- Extinction wikiPageRevisionID "606389463".
- Extinction hasPhotoCollection Extinction.
- Extinction subject Category:Articles_with_inconsistent_citation_formats.
- Extinction subject Category:Biota_by_conservation_status.
- Extinction subject Category:Environmental_conservation.
- Extinction subject Category:Evolutionary_biology.
- Extinction subject Category:Extinction.
- Extinction subject Category:International_Union_for_Conservation_of_Nature.
- Extinction comment "In biology and ecology, extinction is the end of an organism or of a group of organisms (taxon), normally a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and recover may have been lost before this point. Because a species' potential range may be very large, determining this moment is difficult, and is usually done retrospectively.".
- Extinction label "Aussterben".
- Extinction label "Estinzione".
- Extinction label "Extinción".
- Extinction label "Extinction des espèces".
- Extinction label "Extinction".
- Extinction label "Extinção".
- Extinction label "Uitsterven".
- Extinction label "Wymieranie".
- Extinction label "Вымирание".
- Extinction label "انقراض".
- Extinction label "絶滅".
- Extinction label "绝灭".
- Extinction sameAs Vymírání.
- Extinction sameAs Aussterben.
- Extinction sameAs Εξαφάνιση_(βιολογία).
- Extinction sameAs Extinción.
- Extinction sameAs Espezieen_iraungipen.
- Extinction sameAs Extinction_des_espèces.
- Extinction sameAs Kepunahan.
- Extinction sameAs Estinzione.
- Extinction sameAs 絶滅.
- Extinction sameAs 절멸.
- Extinction sameAs Uitsterven.
- Extinction sameAs Wymieranie.
- Extinction sameAs Extinção.
- Extinction sameAs m.0d4y5.
- Extinction sameAs Q123509.
- Extinction sameAs Q123509.
- Extinction wasDerivedFrom Extinction?oldid=606389463.
- Extinction depiction Various_dinosaurs.png.
- Extinction isPrimaryTopicOf Extinction.
