Norway Maples are considered an invasive tree in my area. I've got a very large, mature-looking specimen in my yard and while it looks quite lovely I know it only supports a tiny fraction of the insect life a native tree of similar size would. Since I'm trying to use my yard to support the ecosystem a la Homegrown National Park, this is a big concern for me. On the other hand, removing a large tree is very expensive... and I'm not sure whether having any mature tree, even an invasive one, is better for the micro-habitat that is my yard than waiting decades for a replacement native tree to reach the same size.
I'm wondering whether it's better to...
- Leave it, and hope it dies on its own soon (one arborist I spoke to said they have a tendency to girdle themselves and die young, but I don't know whether that's true when they aren't planted as street trees) knowing it could take decades to go
- Take the nuclear option and pay hundreds or thousands of dollars to get it removed, then immediately replace it with a nice oak sapling
- Perform arboreal euthanasia by inoculating it with oyster mushrooms and letting them turn it into a nice dead snag. I imagine it'll be more use to the ecosystem dead than alive, but I don't know if I risk the mushrooms spreading to the (native) maples nearby and harming them too.
- Some other option I haven't thought of???