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47 comments on HOT Hot hot

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Freddy on February 15, 2007 - 4:31pm Permalink | Subthread | Parent | Comments top

Current research is discounting hunting for these extinctions. Not enuf bone damage on found carcasses. It is likely that the food chain was disrupted by the turning of the mass grasslands North of 60 to tundra. Large parts of yukon and alaska known as Beringia were ice free for much of last ice age. Mammoths starved. Saber tooth had no prey. etc etc.

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Stuart Staniford on February 15, 2007 - 4:53pm Permalink | Subthread | Parent | Comments top

References?

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Freddy on February 15, 2007 - 5:55pm Permalink | Subthread | Parent | Comments top

http://www.beringia.com/02/02mainb.html

Stuart et al, click on the "research notes" with each link. Unfortunately most of these were written in 95/96 and have not been updated with current research being shared at local seminars and lectures ... mostly by univ of alaska & univ of calgary paleantologists.

Of all the beringia fauna, wolf has adapted best over time. Much larger now due to absence of predators and new status of near top of the food chain.

With GW, deer are penetrating our are deeper. And that is bringing larger numbers of cougars.

Interesting research presently is why do sabre tooth cats have sabre. Mammoths don't have pierced neck bones. Slashing abdomen?

DNA et al testing allows new diet info by analysis of compounds in ancient teeth.

If i can get a Powerpoint from lecturers, i'll post it another time.

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Stuart Staniford on February 15, 2007 - 6:14pm Permalink | Subthread | Parent | Comments top

I believe there's still a very active debate on this subject with neither side having convinced the other. The Wikipedia has a fair summary. I expect there's some of both going on, but I find the idea that the extra ecological stress of humans was the main cause of so many extinctions in such a short time fairly persuasive.

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