Publication Type: | Journal Article |
Year of Publication: | 1974 |
Authors: | Bock, CE, Bock, JH |
Journal: | American Midland Naturalist |
Volume: | 92 |
Issue: | 2 |
Date Published: | 1974 |
ISBN Number: | 00030031 |
Keywords: | Picidae, Picoides, Picoides tridactylus |
Abstract: | The distribution, ecology and evolution of the three-toed woodpeckers (Picoides) is given a new explanation resolving certain biogeographical paradoxes. One species, Picoides tridactylus, is circumboreally distributed with spruce (Picea), while the other species, P. arcticus, is a larger bird adapted to and distributed with North American closed boreal and montane coniferous forests. It seems highly likely that speciation occurred in North America during Pleistocene glaciation, when pre-tridactylus populations became isolated in the sprucedominated refugium of interior Alaska, and arcticus evolved in more substantial and diverse coniferous forests south of the ice cap. |
URL: | http://www.jstor.org/stable/2424304 |
Short Title: | American Midland Naturalist |
Taxonomic name: