Sierra Nevada Tree Loss (image) University of Washington Share Print E-Mail Caption This August 2016 aerial photo of the Sierra Nevada Mountains in central California shows widespread tree loss. The new study shows changes here can affect plant growth across the country. Credit US Forest Service Usage Restrictions With credit Share Print E-Mail 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.