Stan Harpole, Iowa State University (IMAGE) Iowa State University Caption Stan Harpole, assistant professor of ecology, evolution and organismal biology at Iowa State University, says that invasive plants, on average, aren't any more abundant away from home than they are at home. Credit ISU photo by Bob Elbert 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.