HOME >> BIOLOGY >> NEWS
Climate change plus human pressure caused large mammal extinctions in late Pleistocene

s in less than 500 years. Another suggestion, dubbed "sitzkrieg" after the term for a "sitting" war that shows slow or no progress, is that humans caused extinction through long-term habitat alteration.

Barnosky and his colleagues found sparse evidence outside Australia that humans were the sole cause of extinction. Data are sketchy for the Australian continent, Barnosky cautioned, but little climate change was going on at the time of extinction between 40,000 and 50,000 years ago. However, humans were certainly on the scene, and some scientists think that fires set by humans had as much to do with extinction as direct hunting. Over a few thousand years, Barnosky said, an extended sitzkrieg may have led to the extinction of large mammals such as kangaroos, wombats, the marsupial lion (Thylacoleo carnifex) and the largest ever marsupial, the 2 1/2-ton Diprotodon.

Elsewhere, human activities combined to a greater or lesser degree with climate change to lead to extinctions. In Europe and parts of Asia, mammals such as the giant Irish deer or Irish elk died out broadly toward the end of the late Pliestocene, in some areas before humans were present. Earlier, though, warm-adapted megafauna such as straight-tusked elephants (Palaeoloxodon) and hippos, which were abundant during preceding interglacials, disappeared with the cooling of the last ice age, starting around 45,000 years ago and persisting up to the height of the glacial period 20,000 years ago.

"This is a very clear case of climate-caused extinction without the significant input of humans," Barnosky said.

Similarly, in Alaska and the Yukon, the disappearances of short-faced bears, such as the grizzly-like Arctodus simus, the largest land carnivore ever to inhabit North America; mammoths; and two horse species occurred before apparent signs of human contact.

A second pulse of climate-caused extinctions began in Europe and Asia about 12,000 years ago as cold-adapted animals
'"/>

Contact: Robert Sanders
rls@pa.urel.berkeley.edu
510-643-6998
University of California - Berkeley
30-Sep-2004


Page: 1 2 3 4 5

Related biology news :

1. Climate change could doom Alaskas tundra
2. Climate may play role in lynxs hunting ability
3. Climate change Qs & As
4. Climate change may threaten more than one million species with extinction
5. Climate linked to reproduction of right whales
6. Climate change linked to migratory bird decrease
7. Climate affects recent crop yield gains
8. Climate change surprise: High carbon dioxide levels can retard plant growth, study reveals
9. Climate and cholera: An increasingly important link
10. Grant from Vetlesen Foundation supports URI Graduate School of Oceanography Climate Research
11. Climate monitoring goes mobile

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:4/11/2017)... 11, 2017 Research and Markets has announced ... report to their offering. ... global eye tracking market to grow at a CAGR of 30.37% ... Tracking Market 2017-2021, has been prepared based on an in-depth market ... landscape and its growth prospects over the coming years. The report ...
(Date:4/5/2017)... -- Today HYPR Corp. , leading innovator in ... the HYPR platform is officially FIDO® Certified . ... that empowers biometric authentication across Fortune 500 enterprises and ... 15 million users across the financial services industry, however ... suites and physical access represent a growing portion of ...
(Date:3/30/2017)... HONG KONG , March 30, 2017 ... developed a system for three-dimensional (3D) fingerprint identification by adopting ground ... technology into a new realm of speed and accuracy for use ... applications at an affordable cost. ... ...
Breaking Biology News(10 mins):
(Date:10/12/2017)... ... October 12, 2017 , ... ... pharmaceutical and biotechnology industries to improve patient outcomes and quality of life, will ... analytical testing are being attributed to new regulatory requirements for all new drug ...
(Date:10/11/2017)... Charlotte, N.C. (PRWEB) , ... October 11, 2017 ... ... ARCS® Foundation President Andi Purple announced Dr. Suneel I. Sheikh, the ... Laboratories ( ASTER Labs ), Inc. has been selected for membership in ...
(Date:10/11/2017)... ... ... a basic first aid supply for any work environment, but most personal eye wash can ... a dangerous substance enters both eyes? It’s one less decision, and likely quicker response time ... , “Whether its dirt and debris, or an acid or alkali, getting anything in your ...
(Date:10/11/2017)... (PRWEB) , ... October 11, 2017 , ... ... pathology, announced today it will be hosting a Webinar titled, “Pathology is going ... Pathology Associates , on digital pathology adoption best practices and how Proscia improves ...
Breaking Biology Technology:
Cached News: