Phenology of a northern hardwood forest canopy Richardson, Andrew D. ; Bailey, Amey Schenck ; Denny, Ellen G. ; Martin, C. Wayne ; O'Keefe, John Abstract Publication: Global Change Biology Pub Date: July 2006 DOI: 10.1111/j.1365-2486.2006.01164.x Bibcode: 2006GCBio..12.1174R