Affiliation: | 1.Canadian Forest Service,Laurentian Forestry Centre,Quebec City,Canada;2.School of Forestry,Northern Arizona University,Flagstaff,USA;3.USDA Forest Service,Southern Research Station,Pineville,USA;4.USDA Forest Service,Forest Health Protection,Flagstaff,USA;5.Department of Statistics,North Carolina State University,Raleigh,USA |