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:2/13/2020)... LOS ANGELES (PRWEB) , ... February 13, 2020 ... ... pleased to announce an exclusive interview with Nobio CEO Yoram Ashery ... , Nobio is a company that combats bacteria to keep people healthy ...
(Date:2/10/2020)... ... February 10, 2020 , ... A Worcester Polytechnic ... the new coronavirus (2019-nCoV), a major development that potentially holds the key to ... published viral genome of the Wuhan coronavirus made available on the National ...
(Date:2/5/2020)... ... February 04, 2020 , ... Crystal Diagnostics (CDx) ... a second patent related to proprietary liquid crystal technology for rapid and accurate ... the USPTO issued on December 3, 2019. Together, these patents protect the company’s ...
Breaking Biology News(10 mins):
(Date:1/28/2020)... ... January 28, 2020 , ... ... exclusive distributor to food and beverage manufactures within North America. Both Lifecycle and ... This agreement will allow each company to pool their collective resources and provide ...
(Date:1/24/2020)... ... January 24, 2020 , ... The plastic and reconstructive surgeons ... in New Jersey epitomize the notion that plastic surgery is much more than just ... popular media. , Over the last 20 years NJ Top Docs, Dr. Andrew Elkwood, ...
(Date:1/22/2020)... ... January 21, 2020 , ... Microbial Discovery Group ... Midwest Region Industrial and Institutional (I&I) Account Manager. Darrell will focus on servicing ... Darrell brings over 30 years of sales experience working across multiple different market ...
(Date:1/10/2020)... ... January 09, 2020 , ... GenScript Biotech ... GenScript Biotech Global Forum on Jan. 14 in San Francisco, coinciding with the ... Therapy and the Booming China Market," will feature gene and cell therapy leaders ...
Breaking Biology Technology:
Cached News: