In a similar line of thought, how many wildlife sanctuaries such as your marsh have been destroyed by urbanization, farming, home owners, transportation, businesses, etc.? Here in MN, according to the DNR, at the time of the Public Land Survey (1847-1908), Minnesota had 18 million acres of prairie. Today only a little over 1 percent of native prairie remains.
We are not immune to the responsibility and it will take a complete change of attitude to affect positive change. We sit on our hands and change nothing and expect government to tell us what we must do. Are we that naive?
I think about my own local Lake Osakis. Like many lakes throughout the country, the water quality is somewhat less than desired. The fishery is only a shadow of what it once was due to poorly managed over-harvest and pollution. It was only in the last couple decades that some things have been done to improve the lake's ecosystem and it got a boost from nature itself with the introduction of the invasive zebra mussels. The pollution came from a few sources like farm nutrient runoff, city storm sewer pouring into the lake, and home owners dumping raw sewage into the lake.