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RE: Earth's wobble killed off mammal species
No those figures are of the right order. Mammalian species longevity was on
the order of 0.3-1.2 million years during the Pleistocene and 3 - 6 million
years in the Neogene (there is a great deal of varition between orders).
Bird species were more long-lived in the Pleistocene, about 6 million
years, but in this case there seems to be little difference between the
Paleogene/Neogene and the Pleistocene.
At 10:20 2006-10-12, Botterweg, Rrp wrote:
2-3 million yeras for a species? Are you sure that is not for a genus?
Van: Dann Pigdon [mailto:firstname.lastname@example.org]
Verzonden: do 12-10-2006 6:04
Onderwerp: Re: Earth's wobble killed off mammal species
Ian Paulsen writes:
> I read somewhere that the average species span for a Pleistocene mammal
> was 900,000 years. Longer for a Pleistocene bird. Does this mammalian
> species span hold true for all time periods?
I get the impression that the 2-3 million year value is a very general
average. I'd expect the average to go down during times of rapid climatic
change, and possibly even increase during long periods of stability.
GIS / Archaeologist http://heretichides.soffiles.com
Melbourne, Australia http://www.geocities.com/dannsdinosaurs
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