Fig 1.

A simplified schematic depiction of the relationships among context, concepts, and measures of diversity. Arrows represent informational dependencies (e.g., a reference population is needed to apply a comparative, and hence, a representative diversity concept). Dotted lines indicate optional elements. The context suggests appropriate attributes, reference population, and similarity measures. Given a context, concepts of diversity can be divided into two general types: within-group and comparative, with the latter involving a comparison between the group distribution and properties of a reference population. Diversity measures can then be used to quantify these concepts