Change in surface topography (IMAGE) The University of Hong Kong Caption Invertebrate animals influence many ecological functions of mangrove forests, like the change in surface topography caused by the mounds of burrowing crustaceans at Sam A Chung, located in the northeastern part of Hong Kong. Credit Joe S Y Lee Usage Restrictions N/A License Original 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.