Pine Forest (IMAGE) Stanford University Caption Stanford researchers gathered soil samples from dozens of North American forests, including Pike National Forest in Colorado. They used these samples to better understand the influence of climate change on symbiotic soil microbes that control the health of forests. Credit Kabir Peay Usage Restrictions Image may only be used with appropriate caption or 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.