extinction du Permien.
ressources de vie
This paper shows
- that background extinction definitely preceded mass extinctions;
- introduces a mathematical method for estimating the amount of this background extinction
- and, by subtracting it from total extinction, correcting estimates of losses in mass extinctions, presents a method for estimating the amount of erroneous backward smearing of extinctions from mass extinction intervals
- and introduces a method for calculating species losses in a mass extinction that takes into account clustering of losses.
It concludes that the great terminal Permian crisis eliminated only about 81% of marine species, not the frequently quoted 90–96%.
Life did not almost disappear at the end of the Permian, as has often been asserted.
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Ce ne sont pas les espèces vivantes qui décident de disparâitre un jour.
Copyright GS - 8 octobre 2016