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Climate Change And Human Hunting Combine To Drive The Woolly Mammoth Extinct
Science Daily ^ | 4-1-2008 | PLoS Biology

Posted on 04/01/2008 12:57:30 PM PDT by blam

Climate Change And Human Hunting Combine To Drive The Woolly Mammoth Extinct

Woolly mammoths were driven to extinction by climate change and human impacts. (Credit: Mauricio Anton)

ScienceDaily (Apr. 1, 2008) — Does the human species have mammoth blood on its hands" Scientists have long debated the relative importance of hunting by our ancestors and change in global climate in consigning the mammoth to the history books. A new paper uses climate models and fossil distribution to establish that the woolly mammoth went extinct primarily because of loss of habitat due to changes in temperature, while human hunting acted as the final straw.

It has been particularly difficult to untangle these two potential causes of extinction, as climate change and increased human hunting are linked. When the climate in mammoth territory started to become too warm for the furry beast, it allowed humans--who couldn't handle the lower, mammoth-friendly temperatures--to move into the area.

Therefore, the mammoth faced the heat and predation pressure from hunting in the same regions at approximately the same times, making it difficult to test the importance of the two factors independently. It had also been argued that, as the mammoth had survived many temperature fluctuations previous to those that coincided with its demise, it was only human hunting that was a substantially different condition that could have caused the extinction of the species.

Work by David Nogues-Bravo and colleagues has ended the debate, by using mathematical modelling to separate the two factors. They predicted climate and species distribution at different times in mammoth history--126,000, 42,000, 30,000, 21,000, and 6,000 years ago--considering temperature and rainfall simulations alongside the age and locations of fossils. The results show that the mammoth suffered a catastrophic loss of habitat, with the species 6,000 years ago relegated to 10% of the habitat available to it 42,000 years ago (when the glaciers were at their biggest).

In fact, things were much worse for the mammoth 126,000 years ago when globally high temperatures restricted its habitat even more than at 6,000 years ago. At both of these times, the climate-related habitat loss would have forced the species to the brink of extinction. The nail in the mammoth's coffin 6,000 years ago was that, during the later extinction crisis, the mammoth also faced evolutionarily modern humans. Nogues-Bravo et al. estimate that, for an optimistic estimate of mammoth numbers 6000 years ago, humans would only have had to kill one mammoth each every three years to push the species to extinction. If they are pessimistic about mammoth-climate survival, that figure reaches one mammoth per human every 200 years.

Thus, it seems that, in the case of the mammoth, it was the climate that forced the species to the point of extinction, and it was mankind that gave the woolly beast the last shove into oblivion.

Journal reference: Nogués-Bravo D, Rodríguez J, Hortal J, Batra P, Araújo MB (2008) Climate change, humans, and the extinction of the woolly mammoth. PLoS Biol 6(4): e79. doi:10. 1371/journal.pbio.0060079

Adapted from materials provided by PLoS Biology, via EurekAlert!, a service of AAAS.


TOPICS: News/Current Events
KEYWORDS: climate; climatechange; environment; extinct; godsgravesglyphs; hunting; mammoth; mansfault; woolly

1 posted on 04/01/2008 12:57:30 PM PDT by blam
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To: blam

APRIL FOOL!!!!


2 posted on 04/01/2008 12:59:06 PM PDT by mc5cents (Show me just what Mohammd brought that was new, and there you will find things only evil and inhuman)
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To: SunkenCiv
GGG Ping.

I thought we had all agreed to blame it on the comet?

Comet Theory Collides With Clovis Research, May Explain Disappearance of Ancient People
(And Woolly mammoths)

3 posted on 04/01/2008 1:00:18 PM PDT by blam (Secure the border and enforce the law)
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To: blam
Climate Change And Human Hunting Combine To Drive The Woolly Mammoth Extinct

We should stop this before it's too late.

4 posted on 04/01/2008 1:01:16 PM PDT by decimon
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To: blam

How did Rosie O’Donnell survive?


5 posted on 04/01/2008 1:02:23 PM PDT by Resolute Conservative
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To: blam

He must be in need of grant money.


6 posted on 04/01/2008 1:02:28 PM PDT by PsyOp (Truth in itself is rarely sufficient to make men act. - Clauswitz, On War, 1832.)
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To: blam

This should be in breaking news!

I’m surprised we didn’t see this coming, now all those cute little baby mammoths won’t live to see the next ice age :(

Oh.... wait a minute....


7 posted on 04/01/2008 1:07:32 PM PDT by Rick.Donaldson (http://www.transasianaxis.com - Please visit for lastest on DPRK/Russia/China/et al.)
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To: blam
It was Nigel's fault. He took that SUV back to capture the prehistoric animals.


8 posted on 04/01/2008 1:10:42 PM PDT by Slapshot68
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To: blam

It was far more climate change (not in any way driven by man) than human hunting. Hunters always reach a stable state with their prey or the hunter dies out, too.

The real reason was not warmer climate, but the change in vegetation in higher latitudes due to precipitation. The woolly mammoth thrived in open grasslands, which Siberia once was. As the climate at the end of the ice age warmed, it also became wetter. The increased precipitation led to different vegetation, and the grasslands became forests. The mammoth did not thrive in wooded swamps. So they died out.

Man had very very little, if anything, to do with this. More crap from these egomaniacs who think man has the earth’s thermostat in his pocket.


9 posted on 04/01/2008 1:18:08 PM PDT by henkster (I'm a typical white guy.)
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To: blam

What about the iron meteor fragments recently discovered in mammoth tusks and bones?????


10 posted on 04/01/2008 1:19:26 PM PDT by Calvin Locke
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To: Calvin Locke

Those were the elders of their tribe; standing, pondering while the meteorites fell...


11 posted on 04/01/2008 1:24:48 PM PDT by Old Professer (The critic writes with rapier pen, dips it twice, and writes again.)
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To: Calvin Locke
Ice Age Ends Smashingly: Did A Comet Blow Up Over Eastern Canada?
12 posted on 04/01/2008 1:27:19 PM PDT by blam (Secure the border and enforce the law)
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To: blam

It was Bush’s fault! He and Karl Rove used the Wayback Machine to do this!


13 posted on 04/01/2008 1:31:03 PM PDT by stefanbatory
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To: mc5cents
April fool or not, I notice a trend with all these "documentaries" thrown together with fancy graphics (all fictional), and validated by "scientists" whom we've never heard of before, and whom we'll never hear from again. The common thread, as with global warming, is the absolute faith, the belief actually, that just as with global warming, man is the primary culprit.

These "experts" have two things in common. One -- they can, with absolute confidence, examine a tiny toe bone and invent a whole social structure for the individual, including what he had for breakfast, his family attitudes, where he got water and food, and how he viewed strangers from another culture - like a liberal from Berkeley would, with input from sister Theresa, complete with touchy-feely psychobabble.
Second, they treat their theories as absolute faith. The zealots of the prmised land had nothing over these guys.

The only thing that remains a mystery, and should fuel generations of pschiatrists and psychologists, is the need for these parasites, usually subsisting on grants and foundation money, to blame man for everything in the history of the cosmos. Without hesitation, doubts or qualifiers of any kind.
Needless to say, man has existed only to somehow screw up nature, and man has no rights whatsoever to assume his role in the big picture. That would require, well --- a giant leap of faith.

14 posted on 04/01/2008 1:57:37 PM PDT by Publius6961 (MSM: Israelis are killed by rockets; Lebanese are killed by Israelis.)
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To: blam

He must not of seen “Ice Age 2” the meltdown. The Mammoths died due to Non-Human Caused Global Warming.


15 posted on 04/01/2008 2:05:31 PM PDT by wolfcreek (I see miles and miles of Texas....let's keep it that way.)
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To: Publius6961

I couldn’t agree more.


16 posted on 04/01/2008 2:48:17 PM PDT by mc5cents (Show me just what Mohammd brought that was new, and there you will find things only evil and inhuman)
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To: blam

“When the climate in mammoth territory started to become too warm for the furry beast, it allowed humans—who couldn’t handle the lower, mammoth-friendly temperatures—to move into the area”

No doubt we humans were responsible for this global warming that helped lead the mammoth to extinction by sweating.

“humans would only have had to kill one mammoth each every three years to push the species to extinction.”

The motto of those days: Did you kill your mammoth this triennium?

The human race’s hands are covered with mammoth blood.


17 posted on 04/01/2008 3:00:06 PM PDT by wildbill
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The superhunters must have sucked, since they left millions of bison. The hunting-to-extinction advocates are absurdly stupid.

The Cycle of Cosmic Catastrophes: Flood, Fire, and Famine in the History of Civilization The Cycle of Cosmic Catastrophes:
Flood, Fire, and Famine
in the History of Civilization

by Richard Firestone,
Allen West, and
Simon Warwick-Smith


18 posted on 04/01/2008 4:05:14 PM PDT by SunkenCiv (https://secure.freerepublic.com/donate/_____________________Profile updated Saturday, March 29, 2008)
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To: blam; StayAt HomeMother; Ernest_at_the_Beach; 1ofmanyfree; 24Karet; 3AngelaD; 49th; ...

· join list or digest · view topics · view or post blog · bookmark · post a topic ·

 
Gods
Graves
Glyphs
Thanks Blam. Seems like this gets suggested every year, slightly rephrased, by somebody new.

To all -- please ping me to other topics which are appropriate for the GGG list.
GGG managers are Blam, StayAt HomeMother, and Ernest_at_the_Beach
 

· Google · Archaeologica · ArchaeoBlog · Archaeology magazine · Biblical Archaeology Society ·
· Mirabilis · Texas AM Anthropology News · Yahoo Anthro & Archaeo ·
· History or Science & Nature Podcasts · Excerpt, or Link only? · cgk's list of ping lists ·


19 posted on 04/01/2008 4:11:49 PM PDT by SunkenCiv (https://secure.freerepublic.com/donate/_____________________Profile updated Saturday, March 29, 2008)
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To: blam

Little did we know all those Wolly Mammoths frozen in Siberia were cause by heat...


20 posted on 04/01/2008 4:17:40 PM PDT by TASMANIANRED (TAZ:Untamed, Unpredictable, Uninhibited.)
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To: blam

It is a well known fact that SUV’s and Mammoths compete for the same resources. SUV’s cannot coexist with Mammoths and SUV’s won the fight for survival, hence we still have SUV’s today.

:-)


21 posted on 04/01/2008 5:12:18 PM PDT by coconutt2000 (NO MORE PEACE FOR OIL!!! DOWN WITH TYRANTS, TERRORISTS, AND TIMIDCRATS!!!! (3-T's For World Peace))
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To: TASMANIANRED
Little did we know all those Wolly Mammoths frozen in Siberia were cause by heat...

Nope. SUV's chased the wooly mammoths out of their natural habitat, and they froze to death in Siberia. Oddly enough, with global warming, there are now more SUV's in Siberia than ever before.

22 posted on 04/01/2008 5:14:12 PM PDT by coconutt2000 (NO MORE PEACE FOR OIL!!! DOWN WITH TYRANTS, TERRORISTS, AND TIMIDCRATS!!!! (3-T's For World Peace))
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To: SunkenCiv; blam; All

Obviously, these scientists mathematical models make it “impossible” for the events in this book to have caused the extinctions. Or, perhaps they should also run mathematical models on the probability of one of the trillion objects in the Oort cloud being bumped into an earth intersecting orbit over time. Of course, Clovis was first, because almost nobody bothered to dig any lower, and if they did and found something they were afraid of being ridiculed by the scientists with the difinitive answers. Ah, where are the inquiring minds when we need them.


23 posted on 04/01/2008 5:20:08 PM PDT by gleeaikin
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To: gleeaikin

:’)


24 posted on 04/01/2008 6:09:27 PM PDT by SunkenCiv (https://secure.freerepublic.com/donate/_____________________Profile updated Saturday, March 29, 2008)
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To: blam
I thought we had all agreed to blame it on the comet?

Oh but contraire mon ami, the science has only just now been "settled":

Work by David Nogues-Bravo and colleagues has ended the debate...

So it would seem all those enormous piles of mastodon, wooly mammoth, etc bones scattered around various parts of the world are there because, well, maybe they, by the millions, took a wrong turn somewhere, say, around mid-continent. Early Man then finished 'em off.

How do I apply for my grant???

25 posted on 04/01/2008 6:51:20 PM PDT by ForGod'sSake (ABCNNBCBS: An enemy at the gates is less formidable, for he is known and carries his banner openly.)
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The Mystery Of Mammoth Tusks With Iron Fillings
Alaska Report News | 3-5-2008 | Ned Rozell
Posted on 03/08/2008 2:03:28 PM PST by blam
http://www.freerepublic.com/focus/f-news/1982619/posts


26 posted on 04/03/2008 9:56:38 AM PDT by SunkenCiv (https://secure.freerepublic.com/donate/_____________________Profile updated Saturday, March 29, 2008)
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