Tropical Forest Tree (IMAGE) Smithsonian Tropical Research Institute Caption Tropical forest tree growth, distribution and mortality may be difficult to model. Credit Photo: Christian Ziegler, STRI Archives. 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.