Delayed postglacial colonization of Betula in Iceland and the circum North Atlantic
As the Arctic continues to warm, woody shrubs are expected to expand northward. This process, known as ‘shrubification,’ has important implications for regional biodiversity, food web structure, and high-latitude temperature amplification. While the future rate of shrubification remains poorly const...
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ftpubmed:oai:pubmedcentral.nih.gov:10642962 2023-12-17T10:25:07+01:00 Delayed postglacial colonization of Betula in Iceland and the circum North Atlantic Harning, David J Sacco, Samuel Anamthawat-Jónsson, Kesara Ardenghi, Nicolò Thordarson, Thor Raberg, Jonathan H Sepúlveda, Julio Geirsdóttir, Áslaug Shapiro, Beth Miller, Gifford H 2023-11-13 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10642962/ http://www.ncbi.nlm.nih.gov/pubmed/37955570 https://doi.org/10.7554/eLife.87749 en eng eLife Sciences Publications, Ltd http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10642962/ http://www.ncbi.nlm.nih.gov/pubmed/37955570 http://dx.doi.org/10.7554/eLife.87749 © 2023, Harning et al https://creativecommons.org/licenses/by/4.0/This article is distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use and redistribution provided that the original author and source are credited. eLife Ecology Text 2023 ftpubmed https://doi.org/10.7554/eLife.87749 2023-11-19T01:54:27Z As the Arctic continues to warm, woody shrubs are expected to expand northward. This process, known as ‘shrubification,’ has important implications for regional biodiversity, food web structure, and high-latitude temperature amplification. While the future rate of shrubification remains poorly constrained, past records of plant immigration to newly deglaciated landscapes in the Arctic may serve as useful analogs. We provide one new postglacial Holocene sedimentary ancient DNA (sedaDNA) record of vascular plants from Iceland and place a second Iceland postglacial sedaDNA record on an improved geochronology; both show Salicaceae present shortly after deglaciation, whereas Betulaceae first appears more than 1000 y later. We find a similar pattern of delayed Betulaceae colonization in eight previously published postglacial sedaDNA records from across the glaciated circum North Atlantic. In nearly all cases, we find that Salicaceae colonizes earlier than Betulaceae and that Betulaceae colonization is increasingly delayed for locations farther from glacial-age woody plant refugia. These trends in Salicaceae and Betulaceae colonization are consistent with the plant families’ environmental tolerances, species diversity, reproductive strategies, seed sizes, and soil preferences. As these reconstructions capture the efficiency of postglacial vascular plant migration during a past period of high-latitude warming, a similarly slow response of some woody shrubs to current warming in glaciated regions, and possibly non-glaciated tundra, may delay Arctic shrubification and future changes in the structure of tundra ecosystems and temperature amplification. Text Arctic Iceland North Atlantic Tundra PubMed Central (PMC) Arctic eLife 12 |
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PubMed Central (PMC) |
op_collection_id |
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English |
topic |
Ecology |
spellingShingle |
Ecology Harning, David J Sacco, Samuel Anamthawat-Jónsson, Kesara Ardenghi, Nicolò Thordarson, Thor Raberg, Jonathan H Sepúlveda, Julio Geirsdóttir, Áslaug Shapiro, Beth Miller, Gifford H Delayed postglacial colonization of Betula in Iceland and the circum North Atlantic |
topic_facet |
Ecology |
description |
As the Arctic continues to warm, woody shrubs are expected to expand northward. This process, known as ‘shrubification,’ has important implications for regional biodiversity, food web structure, and high-latitude temperature amplification. While the future rate of shrubification remains poorly constrained, past records of plant immigration to newly deglaciated landscapes in the Arctic may serve as useful analogs. We provide one new postglacial Holocene sedimentary ancient DNA (sedaDNA) record of vascular plants from Iceland and place a second Iceland postglacial sedaDNA record on an improved geochronology; both show Salicaceae present shortly after deglaciation, whereas Betulaceae first appears more than 1000 y later. We find a similar pattern of delayed Betulaceae colonization in eight previously published postglacial sedaDNA records from across the glaciated circum North Atlantic. In nearly all cases, we find that Salicaceae colonizes earlier than Betulaceae and that Betulaceae colonization is increasingly delayed for locations farther from glacial-age woody plant refugia. These trends in Salicaceae and Betulaceae colonization are consistent with the plant families’ environmental tolerances, species diversity, reproductive strategies, seed sizes, and soil preferences. As these reconstructions capture the efficiency of postglacial vascular plant migration during a past period of high-latitude warming, a similarly slow response of some woody shrubs to current warming in glaciated regions, and possibly non-glaciated tundra, may delay Arctic shrubification and future changes in the structure of tundra ecosystems and temperature amplification. |
format |
Text |
author |
Harning, David J Sacco, Samuel Anamthawat-Jónsson, Kesara Ardenghi, Nicolò Thordarson, Thor Raberg, Jonathan H Sepúlveda, Julio Geirsdóttir, Áslaug Shapiro, Beth Miller, Gifford H |
author_facet |
Harning, David J Sacco, Samuel Anamthawat-Jónsson, Kesara Ardenghi, Nicolò Thordarson, Thor Raberg, Jonathan H Sepúlveda, Julio Geirsdóttir, Áslaug Shapiro, Beth Miller, Gifford H |
author_sort |
Harning, David J |
title |
Delayed postglacial colonization of Betula in Iceland and the circum North Atlantic |
title_short |
Delayed postglacial colonization of Betula in Iceland and the circum North Atlantic |
title_full |
Delayed postglacial colonization of Betula in Iceland and the circum North Atlantic |
title_fullStr |
Delayed postglacial colonization of Betula in Iceland and the circum North Atlantic |
title_full_unstemmed |
Delayed postglacial colonization of Betula in Iceland and the circum North Atlantic |
title_sort |
delayed postglacial colonization of betula in iceland and the circum north atlantic |
publisher |
eLife Sciences Publications, Ltd |
publishDate |
2023 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10642962/ http://www.ncbi.nlm.nih.gov/pubmed/37955570 https://doi.org/10.7554/eLife.87749 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Iceland North Atlantic Tundra |
genre_facet |
Arctic Iceland North Atlantic Tundra |
op_source |
eLife |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10642962/ http://www.ncbi.nlm.nih.gov/pubmed/37955570 http://dx.doi.org/10.7554/eLife.87749 |
op_rights |
© 2023, Harning et al https://creativecommons.org/licenses/by/4.0/This article is distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use and redistribution provided that the original author and source are credited. |
op_doi |
https://doi.org/10.7554/eLife.87749 |
container_title |
eLife |
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12 |
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1785573449111961600 |