Elkhorn Slough Floating Algal Mat (IMAGE) University of California - Santa Cruz Caption Excess nutrients stimulate the growth of algae in Elkhorn Slough, leading to the formation of green algal mats on the surface. Credit Brent Hughes Usage Restrictions For use only with news coverage of this research. 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.