Changing Landscape (image) University of Illinois at Urbana-Champaign Caption The magenta-flowered fireweed, which springs up after a burn, dominates a landscape once covered in black spruce in Alaska's Yukon Flats. Credit Feng Sheng Hu Usage Restrictions Image may be used only to accompany stories described in this release. Credit required: Feng Sheng Hu. 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.