Navigation Links
Man may have caused pre-historic extinctions

New research shows that pre-historic horses in Alaska may have been hunted into extinction by man, rather than by climate change as previously thought.

The discovery by Andrew Solow of Woods Hole Oceanographic Institute, US, David Roberts of the Royal Botanic Garden, Kew and Karen Robbirt of the University of East Anglia (UEA) is published this week in Proceedings of the National Academy of Sciences (PNAS).

The accepted view had previously been that the wild horses became extinct long before the extinction of mammoths and the arrival of humans from Asia - ruling out the possibility that they were over-hunted by man. One theory had been that a period of climate cooling wiped them out.

However, the researchers have discovered that uncertainties in dating fossil remains and the incompleteness of fossil records mean that the survival of the horse beyond the arrival of humans cannot be ruled out.

The PNAS paper develops a new statistical method to help resolve the inherent problems associated with dating fossils from the Pleistocene period. The aim is to provide a far more accurate timetable for the extinction of caballoid horses and mammoths and, ultimately, the cause.

"This research is exciting because it throws open the debate as to whether climate change or over-hunting may have led to the extinction of pre-historic horses in North America," said UEA's Karen Robbirt.

The Pleistocene period refers to the first epoch of the Quarternary period between 1.64 million and 10,000 years ago. It was characterised by extensive glaciation of the northern hemisphere and the evolution of modern man around 100,000 years ago.

It is known that the end of the Pleistocene period was a time of large-scale extinctions of animals and plants in North America and elsewhere but the factors responsible have remained open to question, with climate change and over-hunting by humans the prime suspects.Ends


'"/>

Source:University of East Anglia


Page: 1

Related biology news :

1. UNC launches study of liver injury caused by drugs
2. Oxygen increase caused mammals to triumph, researchers say
3. Blocking the nerve receptor EP1 in mouse models reduces brain damage caused by stroke
4. Stem cell mobilization therapy appears to be ineffective in repairing damage caused by heart attack
5. Whiplash injuries ?are they caused by startle reflexes?
6. Cocaine high caused by interference in neuronal receiving stations
7. Scientists discover new virus caused deaths of transplant recipients from single donor
8. New study may show how to forestall a fatal, virus-caused immune-system meltdown
9. Out-of-body experiences may be caused by arousal system disturbances in brain
10. Super predators and mass extinctions
11. New study pinpoints epicenters of Earths imminent extinctions
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:4/15/2016)... , April 15, 2016  A new ... make more accurate underwriting decisions in a fraction ... timely, competitively priced and high-value life insurance policies ... screenings. With Force Diagnostics, rapid testing ... lifestyle data readings (blood pressure, weight, pulse, BMI, ...
(Date:3/31/2016)...  Genomics firm Nabsys has completed a financial  restructuring ... , M.D., who returned to the company in October ... team, including Chief Technology Officer, John Oliver , ... and Vice President of Software and Informatics, Michael ... Dr. Bready served as CEO of Nabsys from 2005-2014 ...
(Date:3/21/2016)... March 22, 2016 Unique ... passcodes for superior security   ... provider of secure digital communications services, today announced it ... and offer enterprise customers, particularly those in the Financial ... and voice authentication within a mobile app, alongside, and ...
Breaking Biology News(10 mins):
(Date:5/2/2016)... , May 2, 2016 Q ... its technology partner Mannin Research Inc. will be attending ... which takes place from May 1-5, 2016 in ... be meeting with its vendors and research partners. The ... development goals and other collaborative opportunities for the MAN-01 ...
(Date:5/2/2016)... ... 2016 , ... F.E.E.D. Co., the Feline Environmental Enrichment Design ... product for indoor cats. The NoBowl Feeding System replaces the bowl with the ... nature intended. NoBowls make cats happy and healthy. , Since being introduced on ...
(Date:4/29/2016)... ... April 29, 2016 , ... Amendia, Inc., a leading ... today announced the completion of a significant transaction and partnership that positions Amendia ... and partners. Kohlberg & Company, L.L.C. (“Kohlberg”), a leading private equity firm ...
(Date:4/29/2016)... KY and San Diego, CA (PRWEB) , ... April 29, 2016 ... ... National Stem Cell Foundation (NSCF) to support the development of a patient-specific stem cell ... Dr. Andrés Bratt-Leal in the lab of Dr. Jeanne Loring at The Scripps Research ...
Breaking Biology Technology: