Geometricbirds {gpk}

Rank abundance distribution of bird species

Description

4. One approach to biodiversity measurement is fitting a distribution to rank abundance data. In the present case data on abundance of different species is recorded at two localities in western-ghats in India. The species are ranked from most abundant (rank 1) to least abundant. Some ecological considerations suggest that a geometric distribution should fit the data. Parameter of the geometric distribution is taken as indicator of diversity. Higher the value of parameter, lower the diversity.

Usage

data(Geometricbirds)

Format

A data frame with 80 observations on the following 3 variables.

Location

Location of the species

Species_Rank

Species rank

Abundance

number of birds seen of a species

Details

Begin with good ness of fit. Model builder aspirants can also try calculating the Simpson index and Shannon-Wiener index of species diversity.

Source

http://ces.iisc.ernet.in/hpg/nvjoshi/statspunedatabook/databook.html

Examples

data(Geometricbirds)