Salt marshes (IMAGE) University of Oldenburg Caption Salt marshes in the Wadden Sea, an intertidal zone in the southeastern part of the North Sea, are among the most diverse ecosystems. Credit Monika Feiling Usage Restrictions To be used only in connection with the press release 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.