Constraints on post-glacial boreal tree expansion out of far-northern refugia
Aim: To use a variety of data sources to infer how northern boreal trees recovered their range upon deglaciation and/or Holocene warming. Location: Scandinavia, Alaska/north-west Canada (eastern Beringia). Methods: Mapped fossil occurrences for Picea (spruce) were assessed against available palaeoen...
Published in: | Global Ecology and Biogeography |
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Language: | English |
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2014
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Online Access: | https://rhul.elsevierpure.com/en/publications/f7cddc02-ccdc-4a19-96af-85bce33860bd https://doi.org/10.1111/geb.12213 https://pure.royalholloway.ac.uk/ws/files/22903416/Manuscript_final_version.pdf |
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fthollowaycris:oai:pure.royalholloway.ac.uk:publications/f7cddc02-ccdc-4a19-96af-85bce33860bd 2024-04-07T07:51:28+00:00 Constraints on post-glacial boreal tree expansion out of far-northern refugia Edwards, Mary Armbruster, Scott Elias, Scott 2014-11 application/pdf https://rhul.elsevierpure.com/en/publications/f7cddc02-ccdc-4a19-96af-85bce33860bd https://doi.org/10.1111/geb.12213 https://pure.royalholloway.ac.uk/ws/files/22903416/Manuscript_final_version.pdf eng eng https://rhul.elsevierpure.com/en/publications/f7cddc02-ccdc-4a19-96af-85bce33860bd info:eu-repo/semantics/restrictedAccess Edwards , M , Armbruster , S & Elias , S 2014 , ' Constraints on post-glacial boreal tree expansion out of far-northern refugia ' , Global Ecology and Biogeography Letters , vol. 23 , no. 11 , pp. 1198-1208 . https://doi.org/10.1111/geb.12213 Alaska climate change eastern Beringia evolution Late Quaternary Picea refugial population relictual population Scandinavia /dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action article 2014 fthollowaycris https://doi.org/10.1111/geb.12213 2024-03-08T02:42:10Z Aim: To use a variety of data sources to infer how northern boreal trees recovered their range upon deglaciation and/or Holocene warming. Location: Scandinavia, Alaska/north-west Canada (eastern Beringia). Methods: Mapped fossil occurrences for Picea (spruce) were assessed against available palaeoenvironmental and phylogeographic information. Results: For Scandinavia, Last Glacial Maximum (LGM) evidence of Picea is confined to one DNA record, but late-glacial and early-Holocene records include scattered macrofossils. Holocene pollen data show a clear east–west increase to high values. A haplotype unique to the Scandinavian Peninsula is recognized. For eastern Beringia pre- and post-LGM macrofossils occur, but the LGM fossil record comprises only scattered low pollen values. Early Holocene pollen values increase markedly c. 11 cal yr bp (north-west Canada) and c. 10 kcal yr bp (central Alaska). Also at this time three sites on the Bering Land Bridge indicate the presence of Picea where it is now absent. Several unique regional haplotypes were recorded; while most are rare one is common in some modern populations. Main conclusions Small Picea populations probably occurred in pre-Holocene Scandinavia, but pollen patterns argue against immediate expansion with the onset of warmer conditions. Despite relatively weak fossil evidence, refugial populations are also probable in eastern Beringia, particularly given the extent of unglaciated terrain. Post-glacial pollen patterns are more nuanced, suggesting two spatially and temporally distinct expansions, one possibly consistent with a unique central Alaskan haplotype, and subsequent westerly ‘filling-in’. The presence of macrofossils and/or neutral markers does not require that current northern populations are derived primarily from refugial ones, particularly where pollen patterns show delayed directional expansion of large populations though time. Refugial populations initially responded weakly to major post-glacial environmental change; if subject to genetic isolation ... Article in Journal/Newspaper Bering Land Bridge Alaska Beringia Royal Holloway, University of London research portal Canada Global Ecology and Biogeography 23 11 1198 1208 |
institution |
Open Polar |
collection |
Royal Holloway, University of London research portal |
op_collection_id |
fthollowaycris |
language |
English |
topic |
Alaska climate change eastern Beringia evolution Late Quaternary Picea refugial population relictual population Scandinavia /dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action |
spellingShingle |
Alaska climate change eastern Beringia evolution Late Quaternary Picea refugial population relictual population Scandinavia /dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action Edwards, Mary Armbruster, Scott Elias, Scott Constraints on post-glacial boreal tree expansion out of far-northern refugia |
topic_facet |
Alaska climate change eastern Beringia evolution Late Quaternary Picea refugial population relictual population Scandinavia /dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action |
description |
Aim: To use a variety of data sources to infer how northern boreal trees recovered their range upon deglaciation and/or Holocene warming. Location: Scandinavia, Alaska/north-west Canada (eastern Beringia). Methods: Mapped fossil occurrences for Picea (spruce) were assessed against available palaeoenvironmental and phylogeographic information. Results: For Scandinavia, Last Glacial Maximum (LGM) evidence of Picea is confined to one DNA record, but late-glacial and early-Holocene records include scattered macrofossils. Holocene pollen data show a clear east–west increase to high values. A haplotype unique to the Scandinavian Peninsula is recognized. For eastern Beringia pre- and post-LGM macrofossils occur, but the LGM fossil record comprises only scattered low pollen values. Early Holocene pollen values increase markedly c. 11 cal yr bp (north-west Canada) and c. 10 kcal yr bp (central Alaska). Also at this time three sites on the Bering Land Bridge indicate the presence of Picea where it is now absent. Several unique regional haplotypes were recorded; while most are rare one is common in some modern populations. Main conclusions Small Picea populations probably occurred in pre-Holocene Scandinavia, but pollen patterns argue against immediate expansion with the onset of warmer conditions. Despite relatively weak fossil evidence, refugial populations are also probable in eastern Beringia, particularly given the extent of unglaciated terrain. Post-glacial pollen patterns are more nuanced, suggesting two spatially and temporally distinct expansions, one possibly consistent with a unique central Alaskan haplotype, and subsequent westerly ‘filling-in’. The presence of macrofossils and/or neutral markers does not require that current northern populations are derived primarily from refugial ones, particularly where pollen patterns show delayed directional expansion of large populations though time. Refugial populations initially responded weakly to major post-glacial environmental change; if subject to genetic isolation ... |
format |
Article in Journal/Newspaper |
author |
Edwards, Mary Armbruster, Scott Elias, Scott |
author_facet |
Edwards, Mary Armbruster, Scott Elias, Scott |
author_sort |
Edwards, Mary |
title |
Constraints on post-glacial boreal tree expansion out of far-northern refugia |
title_short |
Constraints on post-glacial boreal tree expansion out of far-northern refugia |
title_full |
Constraints on post-glacial boreal tree expansion out of far-northern refugia |
title_fullStr |
Constraints on post-glacial boreal tree expansion out of far-northern refugia |
title_full_unstemmed |
Constraints on post-glacial boreal tree expansion out of far-northern refugia |
title_sort |
constraints on post-glacial boreal tree expansion out of far-northern refugia |
publishDate |
2014 |
url |
https://rhul.elsevierpure.com/en/publications/f7cddc02-ccdc-4a19-96af-85bce33860bd https://doi.org/10.1111/geb.12213 https://pure.royalholloway.ac.uk/ws/files/22903416/Manuscript_final_version.pdf |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Bering Land Bridge Alaska Beringia |
genre_facet |
Bering Land Bridge Alaska Beringia |
op_source |
Edwards , M , Armbruster , S & Elias , S 2014 , ' Constraints on post-glacial boreal tree expansion out of far-northern refugia ' , Global Ecology and Biogeography Letters , vol. 23 , no. 11 , pp. 1198-1208 . https://doi.org/10.1111/geb.12213 |
op_relation |
https://rhul.elsevierpure.com/en/publications/f7cddc02-ccdc-4a19-96af-85bce33860bd |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1111/geb.12213 |
container_title |
Global Ecology and Biogeography |
container_volume |
23 |
container_issue |
11 |
container_start_page |
1198 |
op_container_end_page |
1208 |
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1795666428448210944 |