The National Science Foundation (NSF) is inviting renewal proposals for its Long-Term Ecological Research (LTER) Program, which aims to address ecological questions through long-term observations and experiments at designated research sites. Eligible applicants include organizations or institutions currently holding active LTER awards, with the lead Principal Investigator (PI) required to be the same as on the current award or a co-PI. This program, established in 1980, supports research that contributes to fundamental ecological theories and enhances understanding of long-term ecological dynamics across various ecosystems. The estimated total funding for this opportunity is $15.3 million, with approximately 12 awards expected, and proposals are due by March 6, 2025. For further information, applicants can contact NSF grants.gov support at grantsgovsupport@nsf.gov.