Comment on "Glacial Survival of Boreal Trees in Northern Scandinavia"

ISSN
0036-8075
Date Issued
2012
Author(s)
Birks, Hilary H.
Hewitt, Godfrey M.
Tzedakis, Polychronis C.
Bakke, Jostein
Birks, H. John B.
DOI
10.1126/science.1225345
Abstract
Parducci et al. (Reports, 2 March 2012, p. 1083) fail to present convincing evidence for glacial survival of Pinus and Picea in northern Scandinavia. Their methodology does not exclude contamination. Additionally, they should consider the lack of suitable habitats, the apparent extinction of both taxa after deglacial warming, and alternative hypotheses for the distribution of the Picea genetic marker haplotype A.