Die-off along Ditches, Cape Cod Salt Marsh (image) Ecological Society of America Share Print E-Mail Caption Ditches at sites with heavy recreational fishing pressure are denuded by Sesarma herbivory and widen over time through erosion and continued herbivory. Ditches at this site were dug in the 1930s at <0.5m wide, but are now >5m in many areas. Ditches at nearby die-off sites on Cape Cod have expanded to >30m where herbivory is intense. Credit Tyler Coverdale Usage Restrictions Include credit Share Print E-Mail 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.