Wildland Health Index graph (IMAGE) Montana State University Caption Montana State University professor Andrew Hansen and MSU research scientist Linda Phillips, both in MSU's Department of Ecology, have created a wildland health index that shows that increased population and density, as well as a changing climate, are affecting the overall ecological health of the Greater Yellowstone Ecosystem. Credit Linda Phillips Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.