Postglacial viability and colonization in North America's ice-free corridor.
During the Last Glacial Maximum, continental ice sheets isolated Beringia (northeast Siberia and northwest North America) from unglaciated North America. By around 15 to 14 thousand calibrated radiocarbon years before present (cal. kyr bp), glacial retreat opened an approximately 1,500-km-long corri...
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ftcdlib:oai:escholarship.org:ark:/13030/qt76h9t39c 2023-06-18T03:43:29+02:00 Postglacial viability and colonization in North America's ice-free corridor. Pedersen, Mikkel W Ruter, Anthony Schweger, Charles Friebe, Harvey Staff, Richard A Kjeldsen, Kristian K Mendoza, Marie LZ Beaudoin, Alwynne B Zutter, Cynthia Larsen, Nicolaj K Potter, Ben A Nielsen, Rasmus Rainville, Rebecca A Orlando, Ludovic Meltzer, David J Kjær, Kurt H Willerslev, Eske 45 - 49 2016-09-01 application/pdf https://escholarship.org/uc/item/76h9t39c unknown eScholarship, University of California qt76h9t39c https://escholarship.org/uc/item/76h9t39c CC-BY-NC-ND Nature, vol 537, iss 7618 Animals Bison Deer Humans Pollen DNA Animal Migration Genomics Ice Cover Geologic Sediments Models Theoretical Fossils History Ancient North America Siberia Radiometric Dating Mammoths Human Migration Forests Climate Action General Science & Technology article 2016 ftcdlib 2023-06-05T18:01:05Z During the Last Glacial Maximum, continental ice sheets isolated Beringia (northeast Siberia and northwest North America) from unglaciated North America. By around 15 to 14 thousand calibrated radiocarbon years before present (cal. kyr bp), glacial retreat opened an approximately 1,500-km-long corridor between the ice sheets. It remains unclear when plants and animals colonized this corridor and it became biologically viable for human migration. We obtained radiocarbon dates, pollen, macrofossils and metagenomic DNA from lake sediment cores in a bottleneck portion of the corridor. We find evidence of steppe vegetation, bison and mammoth by approximately 12.6 cal. kyr bp, followed by open forest, with evidence of moose and elk at about 11.5 cal. kyr bp, and boreal forest approximately 10 cal. kyr bp. Our findings reveal that the first Americans, whether Clovis or earlier groups in unglaciated North America before 12.6 cal. kyr bp, are unlikely to have travelled by this route into the Americas. However, later groups may have used this north-south passageway. Article in Journal/Newspaper Beringia Siberia University of California: eScholarship The Corridor ENVELOPE(78.139,78.139,-68.582,-68.582) |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
Animals Bison Deer Humans Pollen DNA Animal Migration Genomics Ice Cover Geologic Sediments Models Theoretical Fossils History Ancient North America Siberia Radiometric Dating Mammoths Human Migration Forests Climate Action General Science & Technology |
spellingShingle |
Animals Bison Deer Humans Pollen DNA Animal Migration Genomics Ice Cover Geologic Sediments Models Theoretical Fossils History Ancient North America Siberia Radiometric Dating Mammoths Human Migration Forests Climate Action General Science & Technology Pedersen, Mikkel W Ruter, Anthony Schweger, Charles Friebe, Harvey Staff, Richard A Kjeldsen, Kristian K Mendoza, Marie LZ Beaudoin, Alwynne B Zutter, Cynthia Larsen, Nicolaj K Potter, Ben A Nielsen, Rasmus Rainville, Rebecca A Orlando, Ludovic Meltzer, David J Kjær, Kurt H Willerslev, Eske Postglacial viability and colonization in North America's ice-free corridor. |
topic_facet |
Animals Bison Deer Humans Pollen DNA Animal Migration Genomics Ice Cover Geologic Sediments Models Theoretical Fossils History Ancient North America Siberia Radiometric Dating Mammoths Human Migration Forests Climate Action General Science & Technology |
description |
During the Last Glacial Maximum, continental ice sheets isolated Beringia (northeast Siberia and northwest North America) from unglaciated North America. By around 15 to 14 thousand calibrated radiocarbon years before present (cal. kyr bp), glacial retreat opened an approximately 1,500-km-long corridor between the ice sheets. It remains unclear when plants and animals colonized this corridor and it became biologically viable for human migration. We obtained radiocarbon dates, pollen, macrofossils and metagenomic DNA from lake sediment cores in a bottleneck portion of the corridor. We find evidence of steppe vegetation, bison and mammoth by approximately 12.6 cal. kyr bp, followed by open forest, with evidence of moose and elk at about 11.5 cal. kyr bp, and boreal forest approximately 10 cal. kyr bp. Our findings reveal that the first Americans, whether Clovis or earlier groups in unglaciated North America before 12.6 cal. kyr bp, are unlikely to have travelled by this route into the Americas. However, later groups may have used this north-south passageway. |
format |
Article in Journal/Newspaper |
author |
Pedersen, Mikkel W Ruter, Anthony Schweger, Charles Friebe, Harvey Staff, Richard A Kjeldsen, Kristian K Mendoza, Marie LZ Beaudoin, Alwynne B Zutter, Cynthia Larsen, Nicolaj K Potter, Ben A Nielsen, Rasmus Rainville, Rebecca A Orlando, Ludovic Meltzer, David J Kjær, Kurt H Willerslev, Eske |
author_facet |
Pedersen, Mikkel W Ruter, Anthony Schweger, Charles Friebe, Harvey Staff, Richard A Kjeldsen, Kristian K Mendoza, Marie LZ Beaudoin, Alwynne B Zutter, Cynthia Larsen, Nicolaj K Potter, Ben A Nielsen, Rasmus Rainville, Rebecca A Orlando, Ludovic Meltzer, David J Kjær, Kurt H Willerslev, Eske |
author_sort |
Pedersen, Mikkel W |
title |
Postglacial viability and colonization in North America's ice-free corridor. |
title_short |
Postglacial viability and colonization in North America's ice-free corridor. |
title_full |
Postglacial viability and colonization in North America's ice-free corridor. |
title_fullStr |
Postglacial viability and colonization in North America's ice-free corridor. |
title_full_unstemmed |
Postglacial viability and colonization in North America's ice-free corridor. |
title_sort |
postglacial viability and colonization in north america's ice-free corridor. |
publisher |
eScholarship, University of California |
publishDate |
2016 |
url |
https://escholarship.org/uc/item/76h9t39c |
op_coverage |
45 - 49 |
long_lat |
ENVELOPE(78.139,78.139,-68.582,-68.582) |
geographic |
The Corridor |
geographic_facet |
The Corridor |
genre |
Beringia Siberia |
genre_facet |
Beringia Siberia |
op_source |
Nature, vol 537, iss 7618 |
op_relation |
qt76h9t39c https://escholarship.org/uc/item/76h9t39c |
op_rights |
CC-BY-NC-ND |
_version_ |
1769009954465775616 |