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The Renkonen similarity index (P), is a measure of dissimilarity between two communities (sites), based on relative (proportional) abundances ${\displaystyle p_{i}=n_{i}/\sum {n_{i}}}$ of individuals of composite species. It was developed by the botanist Olavi Renkonen and published in 1938.

${\displaystyle P=\sum {min(p_{1};p_{2})}}$,

${\displaystyle p_{1}}$ - percentage structure of one set,

${\displaystyle p_{2}}$ - percentage structure of second set.

The codomain of this distance function ranges from 1 (identical proportional abundances) to 0 (no taxa shared).

See also

• Index of dissimilarity

References

1. Renkonen, O. 1938. Statisch-ökologische Untersuchungen über die terrestrische Käferwelt der finnischen Bruchmoore. Ann. Zool. Soc. Bot. Fenn. Vanamo 6:1-231

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