The Long Term Ecological Research (LTER) program concentrates on studies of ecological processes that play out at time scales spanning decades to centuries. Long-term data sets from the LTER program provide a context to evaluate the nature and pace of ecological change, to interpret its effects, and to forecast the range of future biological responses to change.
LTER is covered by Thomson Reuters Data Citation Index. LTER is built on software Provenance Aware Synthesis Tracking Architecture (PASTA). The Network brings together a multi-disciplinary group of more than 2000 scientists and graduate students. The 26 LTER sites encompass diverse ecosystems in the continental United States, Alaska, Antarctica and islands in the Caribbean and the Pacific—including deserts, estuaries, lakes, oceans, coral reefs, prairies, forests, alpine and Arctic tundra, urban areas, and production agriculture. LTER is a founding member of the International Long Term Ecological Research Network. The LTER Network Office is housed at the University of New Mexico (UNM) (ILTER)