Indicator value is a term that is used in the ecology of plants for two different indices. The older usage of the term refers to Ellenberg's indicator values from 1974, which are based on a simple ordinal classification of plants according to the position of their realized ecological niche along an environmental gradient.[1] Since 1997, the term has also been used to refer to Dufrêne & Legendre's indicator value, which is a quantitative index measuring the statistical alliance of a species to any one of the classes in a classification of sites.[2]
- ^ Ellenberg H. Zeigerwerte der Gefässpflanzen Mitteleuropas / H. Ellenberg // Scripta geobotanica. Göttingen, 1974. – Vol. 9. – 197 p.
- ^ Dufrene, Marc; Legendre, Pierre (August 1997). "Species Assemblages and Indicator Species: The Need for a Flexible Asymmetrical Approach". Ecological Monographs. 67 (3): 345. Bibcode:1997EcoM...67..345D. doi:10.2307/2963459. hdl:2268/145383. JSTOR 2963459.