Bray-Curtis Index | | where *n*_{ik} are the number of individuals of taxon *k* at site i, and *n*_{jk} the number at site *j* | similarity/dissimilarity of communities |

Simpson Diversity Index (SDI) | | where *n*_{i} is number of individuals of taxon *i* | more sensitive to species and genera evenness |

Shannon-Wiener Diversity Index (*H*) | | where *n*_{i} is number of individuals of taxon *i* | more sensitive to species and genera richness and to sample size |

Evenness | *e*^{H}/S | where *S* is number of taxa | quantifies the similarity of species and genera frequencies |

Inverse SDI | 1/SDI | where SDI is the Simpson Diversity Index statistic | measures diversity rather than dominance |

Effective Diversity | *e*^{H} | where *H* is the Shannon-Wiener Diversity Index statistic | not logarithmic, unlike the Shannon-Wiener Diversity Index (*H*), and therefore more directly comparable |