karst system Plitvice (IMAGE) Johannes Gutenberg Universitaet Mainz Caption Example of a karst system in the Plitvice Lakes National Park in Croatia: Karst groundwater aquifers are major and important habitats. Credit photo/©: Robert Reinecke Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. No derivatives or adaptations of the work are permitted. License CC BY-NC-ND 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.