Grazing Crab (IMAGE) Duke University Caption Salt marshes at higher latitudes, including those in densely populated coastal regions of New England and Europe, are more susceptible to nutrient loading and overgrazing by herbivorous critters such as this crab than their counterparts in the tropics. Credit Brian Silliman 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.