Assisted migration to address climate change: recommendations for aspen reforestation in western Canada Gray, Laura K. ; Gylander, Tim ; Mbogga, Michael S. ; Chen, Pei-yu ; Hamann, Andreas Abstract Publication: Ecological Applications Pub Date: July 2011 DOI: 10.1890/10-1054.1 Bibcode: 2011EcoAp..21.1591G