Hmm... I can’t see it. Please explain. Doesn’t evolution work just as well at tropical latitudes as at temperate latitudes? Not questioning your knowledge, just trying to understand.
Diversity is, at best, holding steady in the tropics and dying a slow death everywhere else. Evolution is the idea that living DNA re organizes itself into better and better designs. There appears to be a conflict. We are witnessing a “winding down” of diversity as if DNA’s ability to re-invent itself is played out, or getting there real soon. I don’t see how both evolution and this “winding down” phenomenon can be true.