In Brief from the Canadian Forest Service, Laurentian Forest Centre

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In this study, researchers from the University of British Columbia and the Canadian Forest Service showed that the existence of natural barriers, such as mountain ranges, have influenced the recolonization process of western white pine since the last glacial period and, therefore, its genetic diversity. Western white pine is mainly found in the mountains of western North America. A significant decrease in the genetic diversity of this species has been observed in the north, which reflects a recolonization process involving rare seed dispersal events over long distance. Such events would have helped the seeds cross natural barriers.