Cary Institute of Ecosystem Studies (Cary Institute), formerly known as the Institute of Ecosystem Studies, is an independent, not-for-profit environmental research organization dedicated to the scientific study of the world's ecosystems and the natural and human factors that influence them. The organization is headquartered in Millbrook, NY on a 2,000-acre (810 ha) research campus. Areas of expertise include disease ecology, urban ecology, freshwater ecology and provisioning, and forest health.