{"term":{"id":"14499","title":"biotic index","longtitle":"IUPAC Gold Book - biotic index","doi":"10.1351\/goldbook.14499","code":"14499","status":"current","definitions":[{"id":1,"text":"One of several ranking systems calculated from the presence or abundance of sensitive species relative to tolerant species.","notes":{"1":"Biotic indices measure decreased environmental quality from effects on especially sensitive species and should not be compared to diversity indices, which measure community structure."},"links":[{"term":"community structure","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/14536"},{"term":"diversity indices","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/14599"}],"sources":["PAC, 2009, 81, 829. 'Glossary of terms used in ecotoxicology (IUPAC Recommendations 2009)' on page 852 (https:\/\/doi.org\/10.1351\/PAC-REC-08-07-09)"]}],"altoutputs":{"html":"https:\/\/goldbook.iupac.org\/terms\/view\/14499\/html","xml":"https:\/\/goldbook.iupac.org\/terms\/view\/14499\/xml","plain":"https:\/\/goldbook.iupac.org\/terms\/view\/14499\/plain"},"citation":"Citation: 'biotic index' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351\/goldbook.14499","license":"The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https:\/\/creativecommons.org\/licenses\/by-sa\/4.0\/) for individual terms.","collection":"If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org .","disclaimer":"The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using.","accessed":"2026-06-20T01:23:09+00:00"}}