Ice-age endurance: DNA evidence of a white spruce refugium in Alaska
Paleorecords offer key information for evaluating model simulations of species migration in response to forecast climatic change. However, their utility can be greatly compromised by the existence of glacial refugia that are undetectable in fossil records (cryptic refugia). Despite several decades o...
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National Academy of Sciences
2006
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ftoskarbordeaux:oai:oskar-bordeaux.fr:20.500.12278/157108 2023-05-15T16:41:09+02:00 Ice-age endurance: DNA evidence of a white spruce refugium in Alaska ANDERSON, Lynn L. HU, Feng Sheng NELSON, David M. PETIT, Remy PAIGE, Ken N. 2006 https://oskar-bordeaux.fr/handle/20.500.12278/157108 https://hdl.handle.net/20.500.12278/157108 https://doi.org/10.1073/pnas.0605310103 en eng National Academy of Sciences 0027-8424 https://oskar-bordeaux.fr/handle/20.500.12278/157108 doi:10.1073/pnas.0605310103 PICEA GLAUCA ADN CHLOROPLASTIQUE REFUGIA CHLOROPLAST CLIMATIC CHANGE BERINGIA EPICEA Sciences du Vivant [q-bio]/Biologie cellulaire Article de revue 2006 ftoskarbordeaux https://doi.org/20.500.12278/157108 https://doi.org/10.1073/pnas.0605310103 2022-10-18T22:33:43Z Paleorecords offer key information for evaluating model simulations of species migration in response to forecast climatic change. However, their utility can be greatly compromised by the existence of glacial refugia that are undetectable in fossil records (cryptic refugia). Despite several decades of investigation, it remains controversial whether Beringia, the largely unglaciated area extending from northeastern Siberia to the Yukon Territory, harbored small populations of certain boreal tree species during the last glaciation. Here, we present genetic evidence for the existence of a glacial refuge in Alaska that helps to resolve this long-standing controversy. We sequenced chloroplast DNA (cpDNA) of white spruce (Picea glauca), a dominant boreal tree species, in 24 forest stands across northwestern North America. The majority of cpDNA haplotypes are unique, and haplotype diversity is relatively high in Alaska, arguing against the possibility that this species migrated into the region from areas south of the Laurentide Ice Sheet after the end of the last glaciation. Thus, white spruce apparently survived long glacial episodes under climatic extremes in a heterogeneous landscape matrix. These results suggest that estimated rates of tree migration from fossil records may be too high and that the ability of trees to track anthropogenic warming may be more limited than previously thought Other/Unknown Material Ice Sheet Alaska Beringia Siberia Yukon OSKAR Bordeaux (Open Science Knowledge ARchive) Yukon |
institution |
Open Polar |
collection |
OSKAR Bordeaux (Open Science Knowledge ARchive) |
op_collection_id |
ftoskarbordeaux |
language |
English |
topic |
PICEA GLAUCA ADN CHLOROPLASTIQUE REFUGIA CHLOROPLAST CLIMATIC CHANGE BERINGIA EPICEA Sciences du Vivant [q-bio]/Biologie cellulaire |
spellingShingle |
PICEA GLAUCA ADN CHLOROPLASTIQUE REFUGIA CHLOROPLAST CLIMATIC CHANGE BERINGIA EPICEA Sciences du Vivant [q-bio]/Biologie cellulaire ANDERSON, Lynn L. HU, Feng Sheng NELSON, David M. PETIT, Remy PAIGE, Ken N. Ice-age endurance: DNA evidence of a white spruce refugium in Alaska |
topic_facet |
PICEA GLAUCA ADN CHLOROPLASTIQUE REFUGIA CHLOROPLAST CLIMATIC CHANGE BERINGIA EPICEA Sciences du Vivant [q-bio]/Biologie cellulaire |
description |
Paleorecords offer key information for evaluating model simulations of species migration in response to forecast climatic change. However, their utility can be greatly compromised by the existence of glacial refugia that are undetectable in fossil records (cryptic refugia). Despite several decades of investigation, it remains controversial whether Beringia, the largely unglaciated area extending from northeastern Siberia to the Yukon Territory, harbored small populations of certain boreal tree species during the last glaciation. Here, we present genetic evidence for the existence of a glacial refuge in Alaska that helps to resolve this long-standing controversy. We sequenced chloroplast DNA (cpDNA) of white spruce (Picea glauca), a dominant boreal tree species, in 24 forest stands across northwestern North America. The majority of cpDNA haplotypes are unique, and haplotype diversity is relatively high in Alaska, arguing against the possibility that this species migrated into the region from areas south of the Laurentide Ice Sheet after the end of the last glaciation. Thus, white spruce apparently survived long glacial episodes under climatic extremes in a heterogeneous landscape matrix. These results suggest that estimated rates of tree migration from fossil records may be too high and that the ability of trees to track anthropogenic warming may be more limited than previously thought |
format |
Other/Unknown Material |
author |
ANDERSON, Lynn L. HU, Feng Sheng NELSON, David M. PETIT, Remy PAIGE, Ken N. |
author_facet |
ANDERSON, Lynn L. HU, Feng Sheng NELSON, David M. PETIT, Remy PAIGE, Ken N. |
author_sort |
ANDERSON, Lynn L. |
title |
Ice-age endurance: DNA evidence of a white spruce refugium in Alaska |
title_short |
Ice-age endurance: DNA evidence of a white spruce refugium in Alaska |
title_full |
Ice-age endurance: DNA evidence of a white spruce refugium in Alaska |
title_fullStr |
Ice-age endurance: DNA evidence of a white spruce refugium in Alaska |
title_full_unstemmed |
Ice-age endurance: DNA evidence of a white spruce refugium in Alaska |
title_sort |
ice-age endurance: dna evidence of a white spruce refugium in alaska |
publisher |
National Academy of Sciences |
publishDate |
2006 |
url |
https://oskar-bordeaux.fr/handle/20.500.12278/157108 https://hdl.handle.net/20.500.12278/157108 https://doi.org/10.1073/pnas.0605310103 |
geographic |
Yukon |
geographic_facet |
Yukon |
genre |
Ice Sheet Alaska Beringia Siberia Yukon |
genre_facet |
Ice Sheet Alaska Beringia Siberia Yukon |
op_relation |
0027-8424 https://oskar-bordeaux.fr/handle/20.500.12278/157108 doi:10.1073/pnas.0605310103 |
op_doi |
https://doi.org/20.500.12278/157108 https://doi.org/10.1073/pnas.0605310103 |
_version_ |
1766031582746902528 |