Green Salt Marsh (IMAGE) U.S. National Science Foundation Caption Where are all the salt marshes going? Excess nutrients may be to blame for their decline. Credit NSF Plum Island Ecosystems LTER Site 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.