Less impressive? Do you think there is no significant loss of biodiversity?

In the cities yes. I live outside the city. Some of the biodiversity near me is deadly and city dwellers haven't a clue.

Regardless, fish outweigh mammals by at least an order of magnitude. then calculate arthropods, mollusks, bacteria and plants and you will see this is an overstating of a complex ecosystem.

We’ve decimated many bird populations. Silent Spring is all about that, albeit 50 years old.