Invasive Grasses' Effect on Fire Risk (IMAGE) University of Massachusetts Amherst Caption In the western United States, cheatgrass invasion and the fires that follow leads to 90 percent loss of above-ground biomass, as sagebrush (left) burns and cheatgrass monoculture (right) takes over. Credit UMass Amherst 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.