Technical Comments

Response to Comment on “Glacial Survival of Boreal Trees in Northern Scandinavia”

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Science  09 Nov 2012:
Vol. 338, Issue 6108, pp. 742
DOI: 10.1126/science.1225476

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Abstract

Birks et al. question our proposition that trees survived the Last Glacial Maximum (LGM) in Northern Scandinavia. We dispute their interpretation of our modern genetic data but agree that more work is required. Our field and laboratory procedures were robust; contamination is an unlikely explanation of our results. Their description of Endletvatn as ice-covered and inundated during the LGM is inconsistent with recent geological literature.

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