Five Factors Influencing Forests (image) USDA Forest Service - Northern Research Station Caption Climate change isn't the only factor influencing forests. A new study by Forest Service scientists and partners describes five anthropogenic factors that will radically alter forest conditions and management needs in the Northern United States. Credit Joseph O'Brien, US Forest Service Usage Restrictions None 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.