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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
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1
posted on
05/22/2010 7:49:33 AM PDT
by
SunkenCiv
- What killed the mammoths and other behemoths?
- Ancient Atomic Warfare - Religious texts and geological evidence
- Supernova debris found on Earth
- Deep freeze dealt death knell to bison (Ice Age)
- Supernova Storm Wiped Out Mammoths?
- Supernova Storm Wiped Out Mammoths?
- Scientist: Comets Blasted Early Americans
- Native Americans Recorded Supernova Explosion
- Terrestrial Evidence of a Nuclear Catastrophe in Paleoindian Times
- Did comet start deadly cold snap?
- Diamonds tell tale of comet that killed off the cavemen
- Catastrophic Comet Chilled and Killed Ice Age Beasts (and Clovis people)
- Oregon Researchers Involved In New Clovis-Age Impact Theory (More)
- Comet May Have Doomed Mammoths
- Ice Age Ends Smashingly: Did A Comet Blow Up Over Eastern Canada? (More) (Carolina Bays)
- Climate alarmists lose another piece of evidence
- Comet Theory Collides With Clovis Research, May Explain Disappearance of Ancient People
- NSF Press Release: Comet May Have Exploded Over North America 13,000 Years Ago
- Research Team Says Extraterrestrial Impact To Blame For Ice Age Extinctions (More)
- Cosmic blast may have killed off megafauna: Scientists say early humans doomed, too
- Cosmic blast may have killed off megafauna: Scientists say early humans doomed, too
- Evidence for an extraterrestrial impact 12,900 years ago
- Site Provides Evidence For Ancient Comet Explosion (Topper - SC)
- The End of Eden: The Comet That Changed Civilization
- Great beasts peppered from space
- Did Comets Cause Ancient American Extinctions?
- Al Goodyear And The Secrets Of Ancient Americans
- The mysterious forest rings of northern Ontario
- Life Survived Catastrophic Space Rock Impact [Chesapeake Bay area]
- Research Casts New Light On History Of North America
- Exploding Asteroid Theory Strengthened By New Evidence Located In Ohio, Indiana
- First Humans To Settle Americas Came From Europe, Not From Asia....
- Diamonds Rained Down During Ice Age
- Diamonds Rained Down During Ice Age ($$$)
- First Humans To Settle Americas Came From Europe, Not From Asia Over Bering Strait -
- Tracking down abrupt climate changes (Rapid natural climate change 12,700 years ago)
- Mammoth Mystery: The Beasts' Final Years
- Scientists find signs of 13,000-year-old extinction event
- Scientists say comet killed off mammoths, saber-toothed tigers
- Diamonds Linked to Quick Cooling Eons Ago
- Six North American sites hold 12,900-year-old nanodiamond-rich soil
- Did a Comet Hit Earth 12,000 Years Ago?
- Mammoths wiped out by 'perfect storm?'
- Laser mapping may help solve the mystery of the Mima Mounds
- Humans to Blame for Extinction? - Not Necessarily So ...
- Did a Comet Cause a North American Die-Off around 13,000 Years Ago?
- Carolina bays gouged into the ground at a magnetic reversal
- North America comet theory questioned
- Mini ice age took hold of Europe in months
- Car-Sized Creature Whacked with Tail's Sweet Spot (until 10,000 years ago)
- Starvation 'wiped out' giant deer
- Prehistoric man, giant animal coexisted
- Extinction of Giant Mammals Changed Landscape Dramatically
- Sophisticated hunters not to blame for driving mammoths to extinction
- Big freeze plunged Europe into ice age in months
- Kansas scientists probe mysterious possible comet strikes on Earth
- Explosive Nearby Star Could Threaten Earth
- T Pyxidis Soon To Be A Type Ia Supernova
- The Death Star (Supernova close to Earth - could wipe us out)
- Cave reveals Southwest's abrupt climate swings during Ice Age
- Musk Ox Population Decline Due to Climate, Not Humans, Study Finds
- Hour-long hailstorm may have caused 1,000-year freeze, say scientists
- Comet trail may have caused last ice age - UPI.com
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)
To: 75thOVI; aimhigh; Alice in Wonderland; AndrewC; aragorn; aristotleman; Avoiding_Sulla; BBell; ...
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)
To: Ernest_at_the_Beach; Rurudyne; steelyourfaith; Tolerance Sucks Rocks; xcamel; StayAt HomeMother; ...
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)
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.)
To: SunkenCiv; Defendingliberty; WL-law; Normandy; TenthAmendmentChampion; FrPR; enough_idiocy; ...
6
posted on
05/22/2010 7:54:38 AM PDT
by
steelyourfaith
(America should take a mulligan on the 2008 presidential election.)
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.)
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.)
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.)
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
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)
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)
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
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
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)
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!)
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)
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.
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!)
To: 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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