I spent three Sundays last fall with a community group removing buckthorn and other invasives from an oak savannah hillside that was choking to death. The work was rewarding because one could physically attack and remove the nasties, but I couldn’t help wondering how much good, really, we were doing. I just came across this post about invasives removal and the effect on native pollinator populations: Removing privet helps restore native bee populations. If the effects in southern Ontario are anything like those reported, yes, it works, it is worth doing. Good to know.