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Glacial Survival of Boreal Trees in Northern Scandinavia
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Plant Ecology and Evolution.
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2012 (English)In: Science, ISSN 0036-8075, E-ISSN 1095-9203, Vol. 335, no 6072, 1083-1086 p.Article in journal (Refereed) Published
Abstract [en]

It is commonly believed that trees were absent in Scandinavia during the last glaciation and first recolonized the Scandinavian Peninsula with the retreat of its ice sheet some 9000 years ago. Here, we show the presence of a rare mitochondrial DNA haplotype of spruce that appears unique to Scandinavia and with its highest frequency to the west-an area believed to sustain ice-free refugia during most of the last ice age. We further show the survival of DNA from this haplotype in lake sediments and pollen of Trondelag in central Norway dating back similar to 10,300 years and chloroplast DNA of pine and spruce in lake sediments adjacent to the ice-free Andoya refugium in northwestern Norway as early as similar to 22,000 and 17,700 years ago, respectively. Our findings imply that conifer trees survived in ice-free refugia of Scandinavia during the last glaciation, challenging current views on survival and spread of trees as a response to climate changes.

Place, publisher, year, edition, pages
2012. Vol. 335, no 6072, 1083-1086 p.
National Category
Earth and Related Environmental Sciences
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URN: urn:nbn:se:uu:diva-171400DOI: 10.1126/science.1216043ISI: 000300931100042OAI: oai:DiVA.org:uu-171400DiVA: diva2:511131
Available from: 2012-03-20 Created: 2012-03-19 Last updated: 2017-12-07Bibliographically approved

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Parducci, LauraFontana, Sonia L.Bennett, Keith D.

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