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:6/19/2020)... ... June 18, 2020 , ... Join experts from Envigo Lauren Klaskala, ... live webinar on Wednesday, July 8, 2020 at 11am EDT (4pm BST/UK). ... engineer new models. However, while modifying the genome may be more straightforward, the challenge ...
(Date:6/5/2020)... ... ... “Although we are disappointed to have to make this decision our primary ... We remain committed to creating a global platform to showcase the science, and ... of WMIS. , The abstract deadline for the virtual meeting is ...
(Date:5/28/2020)... ... May 27, 2020 , ... Today bioinformatics leader hc1® ... uniquely combines lab testing insights and hc1’s exclusive Local Risk Index in a ... safety of employees returning to the workplace. , “Some of the best ways ...
Breaking Biology News(10 mins):
(Date:6/23/2020)... ... June 23, 2020 , ... Nobilis Therapeutics, a biopharmaceutical company ... filed an Investigational New Drug application (IND) with the U.S. Food & Drug ... candidate NBTX-001 in patients with panic disorder (PD). , "Adding a PD trial ...
(Date:6/11/2020)... ... June 08, 2020 , ... ... platform delivered through the use of proprietary clean viral vectors, recently announced a ... United States. Greffex’s platform is the world’s most successful gene therapy delivery ...
(Date:6/11/2020)... ... June 09, 2020 , ... TRX ... NEON Micro-Tracer Solution, a highly accurate, contact tracing solution for identification ... workplace. Contact tracing, a core disease control measure, is a key strategy for ...
(Date:6/3/2020)... ... 03, 2020 , ... Thought Technology Ltd. is offering a ... installment, Dr. Inna Khazan will discuss the benefits of using mindfulness techniques with ... the feelings, thoughts, and emotions they are having in the present moment and ...
Breaking Biology Technology:
Cached News: