The Institute for Tropical Ecosystem Studies (ITES) operates as a unit within the Faculty of Natural Sciences of the Río Piedras campusof the University of Puerto Rico (UPR-RP).

ITES conducts research relevant to the management of natural ecosystems and atmospheric chemistry. They establish and maintain long-term experimental and reference studies of ecosystems. ITES applies knowledge gained to develop mechanisms for the restoration of degraded tropical ecosystems and to increase public awareness of the importance of natural ecosystems to human welfare through undergraduate and graduate education.