Use Pielou Corrected when you need to compute corrected Pielou evenness as natural Shannon entropy divided by the natural logarithm of the species count, returning exactly zero when entropy is zero. Enter Shannon entropy and Species count using the definitions and units below so the result can be reproduced.

Shannon entropy

A finite measured or assumed value greater than or equal to 0.

Species count

An integer count or setting greater than or equal to 2.

The published tool contract uses this rule: Compute corrected Pielou evenness as natural Shannon entropy divided by the natural logarithm of the species count, returning exactly zero when entropy is zero.

Corrected Pielou evenness

The calculated corrected pielou evenness.

A ratio or percentage can conceal the scale of its numerator and denominator and becomes sensitive to measurement error when the denominator is small.

Retain the original Shannon entropy and Species count values and their units alongside the result. Species Evenness Pielou is useful when you instead need to compute Pielou evenness from natural-log Shannon entropy and species count. Pielou Evenness provides another view by helping you compute Pielou evenness J = H / ln(S) from the Shannon index and species count, requiring at least two species.

• Species Evenness Pielou

  Compute Pielou evenness from natural-log Shannon entropy and species count.

• Pielou Evenness

  Compute Pielou evenness J = H / ln(S) from the Shannon index and species count, requiring at least two species.

• Shannon Evenness

  Compute Shannon evenness E = H / ln(S) from the Shannon natural-log diversity index and species count, requiring at least two species.