Those "pools" are already man-made ecological systems. Not much to upset there. And you really don't want to live in a swamp, so any swamps that occupy desirabl

Those "pools" are already man-made ecological systems. Not much to upset there. And you really don't want to live in a swamp, so any swamps that occupy desirable real estate are pretty much f*ed anyway. I know that certain species of Killifish in Africa can survive and reproduce in pools left behind by foot-prints. So, yes, quite interesting micro-ecosystems can exist.