skbio.diversity.alpha.enspie

skbio.diversity.alpha.enspie(counts)

Calculate ENS_pie alpha diversity measure.

ENS_pie is equivalent to 1 / dominance:

\[ENS_{pie} = \frac{1}{\sum_{i=1}^s{p_i^2}}\]

where \(s\) is the number of taxa and \(p_i\) is the proportion of the sample represented by taxon \(i\).

Parameters:

counts1-D array_like, int

Vector of counts.

Returns:

double

ENS_pie alpha diversity measure.

See also

dominance

Notes

ENS_pie is defined in [1].

References

[1]

Chase and Knight (2013). “Scale-dependent effect sizes of ecological drivers on biodiversity: why standardised sampling is not enough”. Ecology Letters, Volume 16, Issue Supplement s1, pgs 17-26.