Title: species richness
Long Title: IUPAC Gold Book - species richness
DOI: 10.1351/goldbook.15051
Status: current

Definition
Total number of species in an ecosystem.

Note
This index makes no use of relative abundances.

Related Term
- biodiversity: https://goldbook.iupac.org//terms/view/14479

Source
- PAC, 2009, 81, 829. 'Glossary of terms used in ecotoxicology (IUPAC Recommendations 2009)' on page 948 (https://doi.org/10.1351/PAC-REC-08-07-09)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/15051/html
- json: https://goldbook.iupac.org/terms/view/15051/json
- xml: https://goldbook.iupac.org/terms/view/15051/xml

Citation: Citation: 'species richness' 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.15051
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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: 2026-04-21T11:05:20+00:00