Urban Trees

[tomh009]

danbrotherston
I am curious how you know plantings today are less diverse?  I realize that historically they have been pretty much a monoculture (mostly ash, unfortunately), but I thought we'd realized how terrible an idea that is, and would now be planting a more diverse population.

Actually, when I said that our plantings are less diverse now, I was thinking more of private property owners than municipalities and other organizations. The majority of trees are on private property, after all, and those owners may have different priorities and different levels of knowledge.

Is there some data somewhere on the tree species on private properties?  Or is this just anecdotal observation?