Carbon Stores (IMAGE) Smithsonian Tropical Research Institute Caption Researchers found that the amount of carbon a forest stores is mainly affected by the selective extraction of large trees. Credit Sean Mattson/Smithsonian Tropical Research Institute 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.