RT Journal Article SR Electronic T1 Planting Frequencies and Trends of Street Trees in Southern Ontario Municipalities JF Arboriculture & Urban Forestry (AUF) FD International Society of Arboriculture SP 189 OP 192 DO 10.48044/jauf.1982.045 VO 8 IS 7 A1 J.R. Pickering A1 R.G. Perkins YR 1982 UL http://auf.isa-arbor.com/content/8/7/189.abstract AB Traditionally, municipalities have relied upon a rather narrow range of species for their planting programs. A survey of 23 municipalities in southern Ontario indicates that upwards of 90% of all street trees planted during the 1970’s comprised six species and their cultivars. Trends in the use of individual species have shown changes during the same period. Urban forest managers must be careful not to sacrifice short term gains for long term management difficulties through reduced species diversity.