When diversity indices are used in ecology, the types of interest are usually species, but they can also be other categories, such as genera, families, functional types, or haplotypes. The entities of interest are usually individual … See more

The Shannon index has been a popular diversity index in the ecological literature, where it is also known as Shannon's diversity index, Shannon–Wiener index, and (erroneously) … See more

The Simpson index was introduced in 1949 by Edward H. Simpson to measure the degree of concentration when individuals are classified into types. The same index was … See more

• Alpha diversity
• Beta diversity
• Cultural diversity
• Effective number of parties, a diversity index applied to political parties See more

The value of q is often referred to as the order of the diversity. It defines the sensitivity of the true diversity to rare vs. abundant species by modifying how the weighted mean of … See more

Richness R simply quantifies how many different types the dataset of interest contains. For example, species richness (usually noted S) of a dataset is the number of species in the corresponding species list. Richness is a simple measure, so it has … See more

The Berger–Parker index equals the maximum pi value in the dataset, i.e., the proportional abundance of the most abundant type. This corresponds to the weighted generalized mean of the pi values when q approaches infinity, and hence equals the inverse … See more