Impact of Large Herbivores (IMAGE) Carnegie Institution for Science Caption 3-D images of African savanna vegetation in areas from which large herbivores have been excluded (left) and allowed access (right) give researchers a detailed picture of the ecological impact of the herbivores. The researchers can quantify not only the amount of vegetation change but also structural changes in the habitat. Credit Asner Lab, Carnegie Institution 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.