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New Study Reveals Link Between 'Climate Footprints' and Mass Mammal Extinction
Wiley ^ | May 18, 2010 | Ben Norman

Posted on 05/22/2010 7:49:33 AM PDT by SunkenCiv

"Between 50,000 and 3,000 years before present (BP) 65% of mammal species weighing over 44kg went extinct, together with a lower proportion of small mammals," said lead author Dr David Nogues-Bravo working from the Center for Macroecology, Evolution and Climate in University of Copenhagen. "Why these species became extinct in such large numbers has been hotly debated for over a century."

During the last 50,000 years the global climate became colder and drier, reaching full glacial conditions 21,000 years before present time. Since then the climate has become warmer, and this changing climate created new opportunities for colonization of new regions by humans. While both of these global change actors played significant roles in species extinction this study reveals that changing climate was a significant force driving this mass extinction.

"Until now global evidence to support the climate change argument has been lacking, a large part of existing evidence was based on local or regional estimates between numbers of extinctions, dates of human arrivals and dates of climate change," said Dr Nogues-Bravo.

"Our approach is completely different. By dealing with the issue at a global scale we add a new dimension to the debate by showing that the impact of climate change was not equal across all regions, and we quantify this to reveal each continent's "footprint of climate change."

The study shows that climate change had a global influence over extinctions throughout the late quaternary, but the level of extinction seems to be related to each continent's footprint of climate change. When comparing continents it can then be seen that in Africa, where the climate changed to a relatively lesser extent there were fewer extinctions. However, in North America, more species suffered extinction, as reflected by a greater degree of climate change.

(Excerpt) Read more at wiley.com ...


TOPICS: Astronomy; Science
KEYWORDS: catastrophism; godsgravesglyphs

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


1 posted on 05/22/2010 7:49:33 AM PDT by SunkenCiv
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2 posted on 05/22/2010 7:49:48 AM PDT by SunkenCiv ("Fools learn from experience. I prefer to learn from the experience of others." -- Otto von Bismarck)
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To: 75thOVI; aimhigh; Alice in Wonderland; AndrewC; aragorn; aristotleman; Avoiding_Sulla; BBell; ...
 
Catastrophism
 
· join · view topics · view or post blog · bookmark · post new topic · subscribe ·
 

3 posted on 05/22/2010 7:50:08 AM PDT by SunkenCiv ("Fools learn from experience. I prefer to learn from the experience of others." -- Otto von Bismarck)
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To: Ernest_at_the_Beach; Rurudyne; steelyourfaith; Tolerance Sucks Rocks; xcamel; StayAt HomeMother; ...

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

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

·Dogpile · Archaeologica · LiveScience · Archaeology · Biblical Archaeology Society ·
· Discover · Nat Geographic · Texas AM Anthro News · Yahoo Anthro & Archaeo · Google ·
· The Archaeology Channel · Excerpt, or Link only? · cgk's list of ping lists ·


4 posted on 05/22/2010 7:50:43 AM PDT by SunkenCiv ("Fools learn from experience. I prefer to learn from the experience of others." -- Otto von Bismarck)
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To: SunkenCiv

It’s also quite possible that man ate the bigger beasts first. Cold does things like that to people.


5 posted on 05/22/2010 7:54:21 AM PDT by Tarpon (Obama-Speak ... the fusion of sophistry and Newspeak. It's not a gift, it's just lies.)
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To: SunkenCiv; Defendingliberty; WL-law; Normandy; TenthAmendmentChampion; FrPR; enough_idiocy; ...
Thanx !

 


Beam me to Planet Gore !

6 posted on 05/22/2010 7:54:38 AM PDT by steelyourfaith (America should take a mulligan on the 2008 presidential election.)
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To: SunkenCiv
"Between 50,000 and 3,000 years before present (BP) "

WTF is "before present (BP)"?

It must be the politically correct/atheist version of "BC", Before Christ. I guess "AD" is now just "P", for Present.

Or maybe "BP" could stand for "Bowing President", huh?
7 posted on 05/22/2010 7:54:54 AM PDT by FrankR (Standing against tyranny must start somewhere, or the future belongs to the tyrants.)
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To: FrankR

Before present is just a geologic time measurement term that lays out the years linearly. I doubt it has any other connotations. Just that it’s easy to count back from 0.

BUT — It’s possible the liberals did it ... but it might be one thing that makes stuff simpler for science, worldwide.


8 posted on 05/22/2010 7:58:19 AM PDT by Tarpon (Obama-Speak ... the fusion of sophistry and Newspeak. It's not a gift, it's just lies.)
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To: Tarpon

Thanks...I just never heard it before, and it fits their modus operandi completely...so I assumed.....


9 posted on 05/22/2010 8:01:24 AM PDT by FrankR (Standing against tyranny must start somewhere, or the future belongs to the tyrants.)
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To: SunkenCiv

I know this doesnt apply but didnt some Brit call for the end of the UN climate liars commitee?


10 posted on 05/22/2010 8:07:34 AM PDT by dalebert
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To: SunkenCiv
The problem is that prior there was already constant change in the ‘Climate Footprints’ with ice ages coming and going for at least a million years.

The big mammals survived & thrived these previous changes seemingly with no problem.

But what was the difference between the previous retreats and the last one?

Man.

So methinks this is just another PC study, desperately trying to keep the myth of the Noble Savage going.

11 posted on 05/22/2010 8:09:48 AM PDT by qam1 (There's been a huge party. All plates and the bottles are empty, all that's left is the bill to pay)
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To: qam1

Except that the extinctions overwhelming occurred in North America rather than the other populated continents. I suspect one or more impact events, myself...


12 posted on 05/22/2010 8:12:38 AM PDT by Interesting Times (For the truth about "swift boating" see ToSetTheRecordStraight.com)
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To: Interesting Times; SunkenCiv

Agreed. The article title and conclusions are totally misleading.
The vast majority of the extinctions can be directly traced to whatever happened 11,000 years ago.

This would be like blaming high deer mortality on the falling leaves in the fall and ignoring the guys out there who happen to have guns...

More “Publish or Perish”...
Even if it’s dreck...


13 posted on 05/22/2010 8:18:11 AM PDT by djf
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To: djf

These jerks tell us our very breathing causes global warming. There is no end to their nonsense, which is always written in “doublespeak.”


14 posted on 05/22/2010 8:29:36 AM PDT by Luke21
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To: Interesting Times
Except that the extinctions overwhelming occurred in North America rather than the other populated continents.

North America lost the most because it had the most (or we just currently know of more species), but Australia and South America also lost all of their large mammals.

The pattern is clear, whenever man showed up large mammals start to go extinct.

I suspect one or more impact events, myself...

yes impacts are really, really cool, but unless just by some amazing coincidence that whenever man showed up an impact just happened to always occur in the same exact location the impact(s) hypothesis doesn't make sense.

15 posted on 05/22/2010 8:38:28 AM PDT by qam1 (There's been a huge party. All plates and the bottles are empty, all that's left is the bill to pay)
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To: SunkenCiv
"Between 50,000 and 3,000 years before present (BP) 65% of mammal species weighing over 44kg went extinct, together with a lower proportion of small mammals,"...

No big mystery- more meat on the big guys than the little guys; our ancestors ate them!

16 posted on 05/22/2010 10:17:08 AM PDT by JimRed (To water the Tree of Liberty is to excise a cancer before it kills us. TERM LIMITS, NOW AND FOREVER!)
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To: JimRed

You may be onto something. Could you pass the gravy, please?


17 posted on 05/22/2010 1:26:16 PM PDT by SunkenCiv ("Fools learn from experience. I prefer to learn from the experience of others." -- Otto von Bismarck)
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To: djf
The vast majority of the extinctions can be directly traced to whatever happened 11,000 years ago.

That would be around the end of the Younger Dryas, a nasty cold event that interrupted the warming from the bottom of the last glacial period.

18 posted on 05/22/2010 5:53:00 PM PDT by colorado tanker
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To: SunkenCiv
Thanks Civ. This particular article appears to be a load o' crap. One of these days I intend to go through that list to see what new theories I've missed. Probably a lot but I suspect it's safe to assume a flood or really BIG wave doesn't fit within any of the theories???
19 posted on 05/22/2010 11:05:28 PM PDT by ForGod'sSake (You have just two choices: SUBMIT or RESIST with everything you've got!)
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To: ForGod'sSake

Thanks ForGod’sSake.


20 posted on 05/23/2010 7:02:47 PM PDT by SunkenCiv ("Fools learn from experience. I prefer to learn from the experience of others." -- Otto von Bismarck)
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To: FrankR; SunkenCiv; blam; Coyoteman; All

I may be remembering this wrong, but I think BP which means Before Present, not British Petroleum in this context, counts back from 1950. After this date carbon 14 dating ran into difficulties because of Atomic Bomb effects and other nuclear radiation. So 100 years BP would be 1850 if I am correct.


21 posted on 05/25/2010 9:02:13 PM PDT by gleeaikin
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