HOME >> BIOLOGY >> NEWS
Mammoths stranded on Bering Sea island delayed extinction

Woolly mammoths stranded on Pribilofs delayed extinction Fossil is first record in the Americas of a mammoth population to have survived the Pleistocene

St. Paul, one of the five islands in the Bering Sea Pribilofs, was home to mammoths that survived the extinctions that wiped out mainland and other Bering Sea island mammoth populations.

In an article in the June 17, 2004 edition of the journal Nature, R. Dale Guthrie, professor emeritus at the Institute of Arctic Biology at the University of Alaska Fairbanks, says that when mammoths on the mainland of Alaska and other Bering Sea islands died out during the extinctions at the end of the Pleistocene era (about 11,000 years ago) those on the Pribilofs survived and new radiocarbon dates show how.

It was a matter of being in the right place at the right time and the mammoth tooth fossil that demonstrates Guthrie's point is the first record in the Americas of a mammoth population surviving the Pleistocene.

"During the last glacial maximum, when the sea level was about 120 meters below its current level, what are now the Pribilofs were simply uplands connected to the mainland by a large, flat plain," Guthrie said.

Using accelerator mass spectrometer (AMS) radiocarbon dating, bathymetric (water depth) plots, and sea transgression rates from the Bering Sea, Guthrie found that the mammoths became stranded on the Pribilofs about 13,000 years ago during the Holocene sea level rise after the last glacial maximum.

"Woolly mammoths became extinct on the mainland about 11,500 radiocarbon years ago," Guthrie said. At that time St. Lawrence Island was part of the Alaska mainland and presumably subject to the same extinction pressures as the mainland, but St. Paul had been an island for about 1,500 years.

"Radiocarbon-dated samples from St. Lawrence Island show similar dates of extinction to the mainland," Guthrie said, "but a sample from St. Paul dates to only 7,908 r
'"/>

Contact: Marie Gilbert
marie.gilbert@uaf.edu
907-474-7412
University of Alaska Fairbanks
16-Jun-2004


Page: 1 2

Related biology news :

1. Urban heat islands make cities greener
2. 90 million year old dino tracks found on resort island
3. Study helps explain island populations susceptibility to exotic diseases
4. UCLA study sheds new light on island evolution
5. Articles on life in tropical island streams published in BioScience
6. Attack of the crazy ants - invasional meltdown on an oceanic island
7. Study illustrates diversification, speciation in biological "islands"
8. Pollutant causes delayed flowering in plants
9. Genetics mutations resulting in delayed puberty are focus of MCG study
10. Global warming may be delayed by increase in ocean silica
11. Study details genetic basis of aging -- and how it might be delayed

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


(Date:2/2/2016)... , Feb. 2, 2016  BioMEMS devices ... primarily focused on medical screening and diagnostic ... parameters. Wearable devices that facilitate and assure ... of movement are being bolstered through new ... biomedical signal acquisition coupled with wireless connectivity ...
(Date:2/2/2016)... YORK , Feb. 2, 2016 Technology Enhancements ... presents an analysis of the digital and computed radiography ... Malaysia , and Indonesia ... trends and market size, as well as regional market ... country and discusses market penetration and market attractiveness, both ...
(Date:2/1/2016)... 2016 Rising sales of consumer ... touchfree intuitive gesture control market size ... of consumer electronics coupled with new technological advancements to ... size through 2020   --> ... technological advancements to drive global touchfree intuitive gesture control ...
Breaking Biology News(10 mins):
(Date:2/10/2016)... is introducing a hybrid membership model which will provide ... joining or renewing through an organizational purchasing model. For ... employee in any size association or AMC office can ... benefits.   John H. Graham, IV , ... organizations of any size and their employees to gain ...
(Date:2/10/2016)... Wash., Feb. 10, 2016  IsoRay, Inc. (NYSE MKT: ... brachytherapy and medical radioisotope applications for the treatment of ... today announced its financial results for the second quarter ... 31, 2015. --> ... quarter of fiscal 2016, which ended December 31, 2015, ...
(Date:2/10/2016)... Feb. 10, 2016  Matchbook, Inc., a company ... growing biotech companies, announced today the appointment of ... Advisor. Jim brings nearly 25 years of experience ... having spent nearly two decades in executive level ... Procurement at Genzyme and, most recently headed global ...
(Date:2/10/2016)... ... February 10, 2016 , ... HOLLOWAY AMERICA, a ... Engineering (ISPE) Rocky Mountain Chapter 21st Annual Vendor Exhibition on Thursday, February 18, ... 100 tables for its annual event, which will run from 3:00 p.m. - ...
Breaking Biology Technology:
Cached News: