Algal Overgrowth (IMAGE) Virginia Institute of Marine Science Caption Excess nutrients from fertilizers, wastewater treatment plants, and other sources can fuel algae blooms that shade eelgrass plants by clouding the water and growing on eelgrass blades. Credit © J. Lefcheck/VIMS. Usage Restrictions One-time use only. 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.