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  • Extinction - Wikipedia
    In ecology, extinction is often used informally to refer to local extinction, in which a species ceases to exist in the chosen area of study, but may still exist elsewhere This phenomenon is also known as extirpation Local extinctions may be followed by a replacement of the species taken from other locations; wolf reintroduction is an example of this
  • Extinction event - Wikipedia
    An extinction event (also known as a mass extinction or biotic crisis) is a widespread and rapid decrease in the biodiversity on Earth Such an event is identified by a sharp change in the diversity and abundance of multicellular organisms It occurs when the rate of extinction increases with respect to the rate of speciation Estimates of the number of major mass extinctions in the last 540
  • K T extinction event - Simple English Wikipedia, the free . . .
    The Cretaceous–Tertiary extinction event, now called the Cretaceous–Palaeogene extinction event, was about 66 million years ago It may be called the K T extinction event or K Pg event for short This is the famous event which killed the dinosaurs at the end of the Cretaceous period It was a large-scale mass extinction of animal and plant species The event marks the end of the Mesozoic
  • Extinction massive — Wikipédia
    Une extinction massive ou grande extinction, appelée aussi crise biologique, est un événement relativement bref à l’échelle des temps géologiques (quelques millions d’années au maximum) au cours duquel au moins 75 % des espèces animales et végétales présentes sur la Terre et dans les océans disparaissent [1] Ces trois critères (durée relativement brève, répartition
















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