Most visitors to northern Michigan are looking for sugar sand beaches on the Great Lakes. But if you’re a spawning fish or a migratory bird, you might be looking for a coastal marsh. The Great Lakes used to be lined with coastal marshes that were full of native plants and wildlife. But in lower Michigan, many of these places been drained, plowed, polluted and, more recently, overrun by exotic plants from other parts of the world. Some conservation groups are working to restore and protect the