A good book about the related topic of novel urban ecosystems is "Darwin Comes to Town: How the Urban Jungle Drives Evolution" by Menno Schilthuizen. For urban ecosystems Schilthuizen argues we should accept it; cities are a new habitat anyway, and we should treasure the novel ecosystem that forms in them.

For non-urban places where thriving existing ecosystems get changed completely due to introductions the picture is more complicated; we should not ignore what has been gained by accident, but also mourn the loss.