MediumBiologyHigh School (9–10)GeneralDiversity of Living Organisms › Plant and Animal KingdomsNumerical

A meadow has four kinds of butterflies, with 18, 12, 6 and 4 individuals.

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A meadow has four kinds of butterflies, with $18$ , $12$ , $6$ and $4$ individuals. Find Simpson's diversity index, $D = 1 - \sum (n/N)^2$ .

Need a reminder? The key ideaShow

Simpson's diversity index: $D = 1 - \sum \left(\dfrac{n}{N}\right)^2$ , where $n$ is the number of one species and $N$ the total. Near 0: one species dominates. Larger: the numbers are even.

The worked solution

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