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:7/18/2020)... ... 17, 2020 , ... Commercial launch readiness is a critical stage in a ... cure or vaccine, the global economic downturn will only increase price pressures overall for ... and capturing full value from every product launch is critical. However, history shows that ...
(Date:7/2/2020)... ... July 02, 2020 , ... ... has announced a publication detailing the use of its revolutionary NEXTGENPCR endpoint ... reaction (RT-PCR) in 16 minutes. The article, titled "Ultra-fast one-step RT-PCR protocol ...
(Date:6/25/2020)... ... 24, 2020 , ... eClinical Solutions LLC , a ... accelerate drug development, is collaborating with Karyopharm Therapeutics (Nasdaq: KPTI ) on ... severe COVID-19. This is the first study of an XPO1 inhibitor in patients ...
Breaking Biology News(10 mins):
(Date:7/18/2020)... ... July 16, 2020 , ... “We are thrilled to ... Bioactives. “It’s the only technology of its kind on the market and we were ... with the protective capacity of traditional cultured ingredients, creating a natural way to extend ...
(Date:7/10/2020)... ... July 09, 2020 , ... ... Technology (MIT) has expanded the company’s exclusive license to include clinical applications ... point-of-care diagnostic market, focusing initially on the SARS-CoV-2 biosensor. CANARY’s™ fast ...
(Date:7/7/2020)... ... July 06, 2020 , ... Bio-IT World ... Eli Lilly, Bristol-Myers Squibb, the University of Chicago, Massachusetts General Hospital, Mission: Cure, ... an elite awards program, highlighting outstanding examples of how technology innovations and strategic ...
(Date:6/28/2020)... NIGUEL, Calif. (PRWEB) , ... June 25, 2020 , ... ... announced the launch of Safe Space™ for businesses of all types to ensure cleanliness, ... 3D LiDAR. , A Safe Space™ enabled business will provide a health ...
Breaking Biology Technology:
Cached News: