Large Tree Decline Linked to Water Stress (IMAGE) University of California - Berkeley Caption Severe water stress (left red) since the 1930s mirrors the decline of large trees (right red) seen throughout the state, from the Sierra Nevada to the Coast Ranges. Credit Patrick McIntyre, David Ackerly and Maggi Kelly, UC Berkeley Usage Restrictions None 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.