Ozark Glade (IMAGE) University of California - Davis Caption Increases in woody vegetation have been especially pronounced in glades where fire has been excluded for long periods. In this glade, which has not been burned in several decades, trees and shrubs have become abundant and few grassland wildflowers or grasses remain. Credit Jesse Miller/UC Davis Usage Restrictions Provide credit. 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.