Glacial Survival of Boreal Trees in Northern Scandinavia

Tree Refugia Ideas of how and when boreal plants spread to the formerly glaciated parts of the world following the retreat of the glaciers 9000 years ago are long debated. Models of the postglacial spread of boreal plants argue for dispersal from southern refugia; however, Parducci et al. (p. 1083 )...

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Bibliographic Details
Published in:Science
Main Authors: Parducci, Laura, Jørgensen, Tina, Tollefsrud, Mari Mette, Elverland, Ellen, Alm, Torbjørn, Fontana, Sonia L., Bennett, K. D., Haile, James, Matetovici, Irina, Suyama, Yoshihisa, Edwards, Mary E., Andersen, Kenneth, Rasmussen, Morten, Boessenkool, Sanne, Coissac, Eric, Brochmann, Christian, Taberlet, Pierre, Houmark-Nielsen, Michael, Larsen, Nicolaj Krog, Orlando, Ludovic, Gilbert, M. Thomas P., Kjær, Kurt H., Alsos, Inger Greve, Willerslev, Eske
Format: Article in Journal/Newspaper
Language:English
Published: American Association for the Advancement of Science (AAAS) 2012
Subjects:
Norway
Northern Norway
Online Access:http://dx.doi.org/10.1126/science.1216043
https://www.science.org/doi/pdf/10.1126/science.1216043
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Summary:Tree Refugia Ideas of how and when boreal plants spread to the formerly glaciated parts of the world following the retreat of the glaciers 9000 years ago are long debated. Models of the postglacial spread of boreal plants argue for dispersal from southern refugia; however, Parducci et al. (p. 1083 ) have shown that both spruce and pine were present in small ice-free regions of Scandinavia much earlier than thought. DNA haplotyping confirmed that a remnant mitochondrial type of spruce, once unique to Scandinavia, now lives alongside the more common spruce originating from Eastern Europe. Evidence from lake cores collected from central and northern Norway indicated the survival of conifers as early as 22,000 years before the present, when apart from ice-free pockets, most of Scandinavia was covered by ice.

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