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Modern Analogues of Late-Quaternary Pollen Spectra from the Western Interior of North America

P. M. Anderson, P. J. Bartlein, L. B. Brubaker, K. Gajewski and J. C. Ritchie
Journal of Biogeography
Vol. 16, No. 6 (Nov., 1989), pp. 573-596
Published by: Wiley
DOI: 10.2307/2845212
Stable URL: http://www.jstor.org/stable/2845212
Page Count: 24
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Modern Analogues of Late-Quaternary Pollen Spectra from the Western Interior of North America
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Abstract

The western interior of Canada and adjacent north-central Alaska is a well-defined phytogeographic region, centred on the boreal forest, and including marginal grassland, parkland, forest-tundra and tundra zones. Late Quaternary fossil pollen spectra from twelve lake sites across this area are compared with each of 303 modern pollen sites by a chord-distance similarity measure. The resulting analysis, presented in mapped and downcore form, provides an objective assessment of the range of similarity between fossil and modern pollen spectra in space and time. In general, full-glacial (18,000-15,000 yr BP) spectra have analogues with modern arctic and mid-arctic sites. Late-glacial (14,000-9000 yr BP) spectra have no or very few analogues, but modern analogues are found among the modern spectra for most Holocene spectra, with regional variation in the patterns.

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