Temporary Dam (image) Cary Institute of Ecosystem Studies Share Print E-Mail Caption Authors Emma Rosi and David Post near a temporary dam, erected during field experiments to simulate flushing flows on hippo pools. Credit Amanda Subalusky Usage Restrictions To promote this press release. 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.