Svalbard's Alkhornet bird cliffs (IMAGE) Norwegian University of Science and Technology Caption The Alkhornet bird cliffs. Naturally occurring nutrient-rich soil can be found directly below the bird cliffs, and researchers are monitoring whether non-native plants have spread there. Credit Photo: Kristine Bakke Westergaard, NTNU Usage Restrictions Use only in association with articles about this research and with proper credit. 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.