Lower water levels and warming temperatures have begun to have an effect on the Indiana Dunes area of Lake Michigan, according to recent research. 
From the Post-Tribune
“From lower water levels in Lake Michigan to declining food sources for the endangered Karner Blue butterfly, climate change is having an impact on the national park.
That was the message Saturday during a program at the Douglas Center in Gary’s Miller neighborhood presented by Joy Marburger, a research coordinator with the Great Lakes Research and Education Center based at the lakeshore. It’s one of 19 research centers located in national parks across the country.”
Read the complete article at the link above. You can also read another recent study specifically about the Karner Blue butterfly on the IISG website.