Margalef D

This window displays the index calculated separately for each chosen sample.

Margalef's D has been a favourite index for many years. It is calculated as the species number (S) minus 1 divided by the logarithm of the total number of individuals (N). This program uses the natural logarithm:

To compare two indices see Testing for significant differences between indices.

A simple plot of the way the index changes between samples is displayed by clicking on the Graph tab on the output window.