Foundation of the Marshes: Spartina Grass (IMAGE) U.S. National Science Foundation Caption The coast of Louisiana is lined with extensive salt marshes whose foundation is two species of Spartina grass. Credit USGS 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.