Title: realised niche
Long Title: IUPAC Gold Book - realised niche
DOI: 10.1351/goldbook.14973
Status: current

Definition
Portion of a species’ fundamental niche that it actually occupies.

Note
The realized niche is narrower than the fundamental niche due to pressure from, and interactions with, other organisms (e.g., superior competitors).

Related Terms
- Hutchinsonian niche: https://goldbook.iupac.org//terms/view/14747
- niche: https://goldbook.iupac.org//terms/view/14877

Source
- PAC, 2009, 81, 829. 'Glossary of terms used in ecotoxicology (IUPAC Recommendations 2009)' on page 935 (https://doi.org/10.1351/PAC-REC-08-07-09)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/14973/html
- json: https://goldbook.iupac.org/terms/view/14973/json
- xml: https://goldbook.iupac.org/terms/view/14973/xml

Citation: Citation: 'realised niche' 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.14973
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.
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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: 2026-06-20T01:23:53+00:00