Giant Tortoises (image) Ecological Society of America Share Print E-Mail Caption Galapagos giant tortoises are sometimes called gardeners of the Galapagos because they are responsible for long-distance seed dispersal. Their migration is key for many tree and plant species' survival. Credit Photo courtesy of Guillame Bastille-Rousseau. Usage Restrictions Photo courtesy of Guillame Bastille-Rousseau. 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.