Red Knot (IMAGE) PLOS Caption Commercial shellfish dredging in the Dutch Wadden Sea led to declines in both the quality and amount of the red knot's food resources, causing the population to crash. Credit Photo: Jan van de Kam Usage Restrictions Please cite the authors and PLoS Biology and the source. 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.