An Urchin Barren (IMAGE) University of California - Santa Barbara Caption An urchin barren, pictured, is the result of unchecked population growth among sea urchins, causing destructive and widespread grazing of kelp forests. Credit Ron H. McPeak/UC Regents* 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.