| Abbreviation | Definition |
|---|---|
| INDIRA | Innocent Natural Dynamic Intelligent Reliable Attractive |
| INRMM | Integrated Natural Resources Modelling and Management |
| IPCA | Indigenous Protected and Conserved Area |
| IPEE | International Political Economy and Ecology |
| IPEN | International Pollutant Elimination Network |
| IPSE | Integrative Primate Socio Ecology |
| ISBE | International Society for Behavioral Ecology |
| ISEC | International Society for Ecology and Culture |
| ISIE | International Society for Industrial Ecology |
| ISIE | International Society of Industrial Ecology |
| ISME | International Society for Microbial Ecology |
| ISOG | Iraqi Society of Obstetrics Gynecology |
| ITCE | Integrated Training for Continental Ecology |
| ITME | Institute for Theoretical and Mathematical Ecology |
| ITME | Institute for Tropical Marine Ecology |
| ITTA | InInternal Tropical Timber Agreement |
| IWEC | Indian Wildlife Ecology Conference |
| JCSC | Junction Creek Stewardship Committee |
| KAAE | Kazakh Agency of Applied Ecology |
| KBA | Key Biodiversity Area |