Field and Stream posted a very interesting story recently on how building a dike around Lake Okeechobee has affected the Everglades and the fish and wildlife that live there.  The result of stopping the free flow of water through the area, partly for flood protection after a devastating hurricane and partly for agricultural purposes, has been to decrease and degrade the swamps and increase harmful algal blooms in the waterways due to excess runoff of fertilizer. I have visited the Everglades and marveled at how unique they are, and I hope you get the chance to do so too. You can read the story at https://www.fieldandstream.com/catastrophe-in-everglades-and-how-to-fix-it.

Source: NASA