The Renkonen similarity index (P), is a measure of dissimilarity between two communities (sites), based on relative (proportional) abundances
of individuals of composite species.
It was developed by the botanist Olavi Renkonen and published in 1938.
- percentage structure of one set,
- percentage structure of second set.
The codomain of this distance function ranges from 1 (identical proportional abundances) to 0 (no taxa shared).
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